changeset 49694:dce997f9a93e

8200359: (tz) Upgrade time-zone data to tzdata2018d Reviewed-by: naoto
author rpatil
date Mon, 09 Apr 2018 04:43:03 -0700
parents 1975a94f16cc
children 0d4786e42471
files make/data/tzdata/VERSION make/data/tzdata/africa make/data/tzdata/antarctica make/data/tzdata/asia make/data/tzdata/australasia make/data/tzdata/europe make/data/tzdata/northamerica make/data/tzdata/southamerica make/data/tzdata/zone.tab src/java.base/share/classes/sun/util/resources/TimeZoneNames.java src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_de.java src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_es.java src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_fr.java src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_it.java src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_ja.java src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_ko.java src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_pt_BR.java src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_sv.java src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_zh_CN.java src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_zh_TW.java test/jdk/sun/util/calendar/zi/tzdata/VERSION test/jdk/sun/util/calendar/zi/tzdata/africa test/jdk/sun/util/calendar/zi/tzdata/antarctica test/jdk/sun/util/calendar/zi/tzdata/asia test/jdk/sun/util/calendar/zi/tzdata/australasia test/jdk/sun/util/calendar/zi/tzdata/europe test/jdk/sun/util/calendar/zi/tzdata/northamerica test/jdk/sun/util/calendar/zi/tzdata/southamerica test/jdk/sun/util/calendar/zi/tzdata/zone.tab
diffstat 29 files changed, 1091 insertions(+), 723 deletions(-) [+]
line wrap: on
line diff
--- a/make/data/tzdata/VERSION	Mon Apr 09 13:35:19 2018 +0200
+++ b/make/data/tzdata/VERSION	Mon Apr 09 04:43:03 2018 -0700
@@ -21,4 +21,4 @@
 # or visit www.oracle.com if you need additional information or have any
 # questions.
 #
-tzdata2018c
+tzdata2018d
--- a/make/data/tzdata/africa	Mon Apr 09 13:35:19 2018 +0200
+++ b/make/data/tzdata/africa	Mon Apr 09 04:43:03 2018 -0700
@@ -138,13 +138,13 @@
 
 # Cape Verde / Cabo Verde
 #
+# From Paul Eggert (2018-02-16):
 # Shanks gives 1907 for the transition to +02.
-# Perhaps the 1911-05-26 Portuguese decree
-# https://dre.pt/pdf1sdip/1911/05/12500/23132313.pdf
-# merely made it official?
+# For now, ignore that and follow the 1911-05-26 Portuguese decree
+# (see Europe/Lisbon).
 #
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
-Zone Atlantic/Cape_Verde -1:34:04 -	LMT	1907        # Praia
+Zone Atlantic/Cape_Verde -1:34:04 -	LMT	1912 Jan 01  2:00u # Praia
 			-2:00	-	-02	1942 Sep
 			-2:00	1:00	-01	1945 Oct 15
 			-2:00	-	-02	1975 Nov 25  2:00
@@ -393,15 +393,34 @@
 # See Africa/Abidjan.
 
 # Ghana
+
+# From Paul Eggert (2018-01-30):
+# Whitman says DST was observed from 1931 to "the present";
+# Shanks & Pottenger say 1936 to 1942 with 20 minutes of DST,
+# with transitions on 09-01 and 12-31 at 00:00.
+# Page 33 of Parish GCB, Colonial Reports - Annual. No. 1066. Gold
+# Coast. Report for 1919. (March 1921), OCLC 784024077
+# http://libsysdigi.library.illinois.edu/ilharvest/africana/books2011-05/5530214/5530214_1919/5530214_1919_opt.pdf
+# lists the Determination of the Time Ordinance, 1919, No. 18,
+# "to advance the time observed locally by the space of twenty minutes
+# during the last four months of each year; the object in view being
+# to extend during those months the period of daylight-time available
+# for evening recreation after office hours."
+# Vanessa Ogle, The Global Transformation of Time, 1870-1950 (2015), p 33,
+# writes "In 1919, the Gold Coast (Ghana as of 1957) made Greenwich
+# time its legal time and simultaneously legalized a summer time of
+# UTC - 00:20 minutes from March to October."; a footnote lists
+# the ordinance as being dated 1919-11-24.
+# The Crown Colonist, Volume 12 (1942), p 176, says "the Government
+# intend advancing Gold Coast time half an hour ahead of G.M.T.
+# The actual date of the alteration has not yet been announced."
+# These sources are incomplete and contradictory.  Possibly what is
+# now Ghana observed different DST regimes in different years.  For
+# lack of better info, use Shanks except treat the minus sign as a
+# typo, and assume DST started in 1920 not 1936.
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-# Whitman says DST was observed from 1931 to "the present";
-# Shanks & Pottenger say 1936 to 1942;
-# and September 1 to January 1 is given by:
-# Scott Keltie J, Epstein M (eds), The Statesman's Year-Book,
-# 57th ed. Macmillan, London (1920), OCLC 609408015, pp xxviii.
-# For lack of better info, assume DST was observed from 1920 to 1942.
-Rule	Ghana	1920	1942	-	Sep	 1	0:00	0:20	GHST
-Rule	Ghana	1920	1942	-	Dec	31	0:00	0	GMT
+Rule	Ghana	1920	1942	-	Sep	 1	0:00	0:20	-
+Rule	Ghana	1920	1942	-	Dec	31	0:00	0	-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Africa/Accra	-0:00:52 -	LMT	1918
 			 0:00	Ghana	GMT/+0020
@@ -411,13 +430,13 @@
 
 # Guinea-Bissau
 #
+# From Paul Eggert (2018-02-16):
 # Shanks gives 1911-05-26 for the transition to WAT,
 # evidently confusing the date of the Portuguese decree
-# https://dre.pt/pdf1sdip/1911/05/12500/23132313.pdf
-# with the date that it took effect, namely 1912-01-01.
+# (see Europe/Lisbon) with the date that it took effect.
 #
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
-Zone	Africa/Bissau	-1:02:20 -	LMT	1912 Jan  1
+Zone	Africa/Bissau	-1:02:20 -	LMT	1912 Jan  1  1:00u
 			-1:00	-	-01	1975
 			 0:00	-	GMT
 
@@ -613,9 +632,9 @@
 # at 2am (or 02:00) local time..."
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule Mauritius	1982	only	-	Oct	10	0:00	1:00	S
+Rule Mauritius	1982	only	-	Oct	10	0:00	1:00	-
 Rule Mauritius	1983	only	-	Mar	21	0:00	0	-
-Rule Mauritius	2008	only	-	Oct	lastSun	2:00	1:00	S
+Rule Mauritius	2008	only	-	Oct	lastSun	2:00	1:00	-
 Rule Mauritius	2009	only	-	Mar	lastSun	2:00	0	-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone Indian/Mauritius	3:50:00 -	LMT	1907 # Port Louis
@@ -1060,6 +1079,8 @@
 
 # São Tomé and Príncipe
 
+# See Europe/Lisbon for info about the 1912 transition.
+
 # From Steffen Thorsen (2018-01-08):
 # Multiple sources tell that São Tomé changed from UTC to UTC+1 as
 # they entered the year 2018.
@@ -1068,7 +1089,7 @@
 # http://www.mnec.gov.st/index.php/publicacoes/documentos/file/90-decreto-lei-n-25-2017
 
 Zone	Africa/Sao_Tome	 0:26:56 -	LMT	1884
-			-0:36:45 -	LMT	1912 # Lisbon Mean Time
+			-0:36:45 -	LMT	1912 Jan  1 00:00u # Lisbon MT
 			 0:00	-	GMT	2018 Jan  1 01:00
 			 1:00	-	WAT
 
--- a/make/data/tzdata/antarctica	Mon Apr 09 13:35:19 2018 +0200
+++ b/make/data/tzdata/antarctica	Mon Apr 09 04:43:03 2018 -0700
@@ -98,7 +98,8 @@
 			8:00	-	+08	2011 Oct 28  2:00
 			11:00	-	+11	2012 Feb 21 17:00u
 			8:00	-	+08	2016 Oct 22
-			11:00	-	+11
+			11:00	-	+11	2018 Mar 11  4:00
+			8:00	-	+08
 Zone Antarctica/Davis	0	-	-00	1957 Jan 13
 			7:00	-	+07	1964 Nov
 			0	-	-00	1969 Feb
--- a/make/data/tzdata/asia	Mon Apr 09 13:35:19 2018 +0200
+++ b/make/data/tzdata/asia	Mon Apr 09 04:43:03 2018 -0700
@@ -92,13 +92,13 @@
 Rule	EUAsia	1981	max	-	Mar	lastSun	 1:00u	1:00	S
 Rule	EUAsia	1979	1995	-	Sep	lastSun	 1:00u	0	-
 Rule	EUAsia	1996	max	-	Oct	lastSun	 1:00u	0	-
-Rule E-EurAsia	1981	max	-	Mar	lastSun	 0:00	1:00	S
+Rule E-EurAsia	1981	max	-	Mar	lastSun	 0:00	1:00	-
 Rule E-EurAsia	1979	1995	-	Sep	lastSun	 0:00	0	-
 Rule E-EurAsia	1996	max	-	Oct	lastSun	 0:00	0	-
-Rule RussiaAsia	1981	1984	-	Apr	1	 0:00	1:00	S
+Rule RussiaAsia	1981	1984	-	Apr	1	 0:00	1:00	-
 Rule RussiaAsia	1981	1983	-	Oct	1	 0:00	0	-
 Rule RussiaAsia	1984	1995	-	Sep	lastSun	 2:00s	0	-
-Rule RussiaAsia	1985	2010	-	Mar	lastSun	 2:00s	1:00	S
+Rule RussiaAsia	1985	2010	-	Mar	lastSun	 2:00s	1:00	-
 Rule RussiaAsia	1996	2010	-	Oct	lastSun	 2:00s	0	-
 
 # Afghanistan
@@ -133,7 +133,7 @@
 # (brief)
 # http://www.worldtimezone.com/dst_news/dst_news_armenia03.html
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule Armenia	2011	only	-	Mar	lastSun	 2:00s	1:00	S
+Rule Armenia	2011	only	-	Mar	lastSun	 2:00s	1:00	-
 Rule Armenia	2011	only	-	Oct	lastSun	 2:00s	0	-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Asia/Yerevan	2:58:00 -	LMT	1924 May  2
@@ -159,7 +159,7 @@
 # http://en.apa.az/xeber_azerbaijan_abolishes_daylight_savings_ti_240862.html
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	Azer	1997	2015	-	Mar	lastSun	 4:00	1:00	S
+Rule	Azer	1997	2015	-	Mar	lastSun	 4:00	1:00	-
 Rule	Azer	1997	2015	-	Oct	lastSun	 5:00	0	-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Asia/Baku	3:19:24 -	LMT	1924 May  2
@@ -246,7 +246,7 @@
 # http://www.worldtimezone.com/dst_news/dst_news_bangladesh06.html
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	Dhaka	2009	only	-	Jun	19	23:00	1:00	S
+Rule	Dhaka	2009	only	-	Jun	19	23:00	1:00	-
 Rule	Dhaka	2009	only	-	Dec	31	24:00	0	-
 
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
@@ -787,8 +787,9 @@
 Rule	Macau	1975	1977	-	Apr	Sun>=15	3:30	1:00	D
 Rule	Macau	1978	1980	-	Apr	Sun>=15	0:00	1:00	D
 Rule	Macau	1978	1980	-	Oct	Sun>=15	0:00	0	S
+# See Europe/Lisbon for info about the 1912 transition.
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
-Zone	Asia/Macau	7:34:20 -	LMT	1912 Jan  1
+Zone	Asia/Macau	7:34:20 -	LMT	1911 Dec 31 16:00u
 			8:00	Macau	C%sT
 
 
@@ -1129,61 +1130,61 @@
 # thirtieth day of Shahrivar.
 #
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	Iran	1978	1980	-	Mar	21	0:00	1:00	D
-Rule	Iran	1978	only	-	Oct	21	0:00	0	S
-Rule	Iran	1979	only	-	Sep	19	0:00	0	S
-Rule	Iran	1980	only	-	Sep	23	0:00	0	S
-Rule	Iran	1991	only	-	May	 3	0:00	1:00	D
-Rule	Iran	1992	1995	-	Mar	22	0:00	1:00	D
-Rule	Iran	1991	1995	-	Sep	22	0:00	0	S
-Rule	Iran	1996	only	-	Mar	21	0:00	1:00	D
-Rule	Iran	1996	only	-	Sep	21	0:00	0	S
-Rule	Iran	1997	1999	-	Mar	22	0:00	1:00	D
-Rule	Iran	1997	1999	-	Sep	22	0:00	0	S
-Rule	Iran	2000	only	-	Mar	21	0:00	1:00	D
-Rule	Iran	2000	only	-	Sep	21	0:00	0	S
-Rule	Iran	2001	2003	-	Mar	22	0:00	1:00	D
-Rule	Iran	2001	2003	-	Sep	22	0:00	0	S
-Rule	Iran	2004	only	-	Mar	21	0:00	1:00	D
-Rule	Iran	2004	only	-	Sep	21	0:00	0	S
-Rule	Iran	2005	only	-	Mar	22	0:00	1:00	D
-Rule	Iran	2005	only	-	Sep	22	0:00	0	S
-Rule	Iran	2008	only	-	Mar	21	0:00	1:00	D
-Rule	Iran	2008	only	-	Sep	21	0:00	0	S
-Rule	Iran	2009	2011	-	Mar	22	0:00	1:00	D
-Rule	Iran	2009	2011	-	Sep	22	0:00	0	S
-Rule	Iran	2012	only	-	Mar	21	0:00	1:00	D
-Rule	Iran	2012	only	-	Sep	21	0:00	0	S
-Rule	Iran	2013	2015	-	Mar	22	0:00	1:00	D
-Rule	Iran	2013	2015	-	Sep	22	0:00	0	S
-Rule	Iran	2016	only	-	Mar	21	0:00	1:00	D
-Rule	Iran	2016	only	-	Sep	21	0:00	0	S
-Rule	Iran	2017	2019	-	Mar	22	0:00	1:00	D
-Rule	Iran	2017	2019	-	Sep	22	0:00	0	S
-Rule	Iran	2020	only	-	Mar	21	0:00	1:00	D
-Rule	Iran	2020	only	-	Sep	21	0:00	0	S
-Rule	Iran	2021	2023	-	Mar	22	0:00	1:00	D
-Rule	Iran	2021	2023	-	Sep	22	0:00	0	S
-Rule	Iran	2024	only	-	Mar	21	0:00	1:00	D
-Rule	Iran	2024	only	-	Sep	21	0:00	0	S
-Rule	Iran	2025	2027	-	Mar	22	0:00	1:00	D
-Rule	Iran	2025	2027	-	Sep	22	0:00	0	S
-Rule	Iran	2028	2029	-	Mar	21	0:00	1:00	D
-Rule	Iran	2028	2029	-	Sep	21	0:00	0	S
-Rule	Iran	2030	2031	-	Mar	22	0:00	1:00	D
-Rule	Iran	2030	2031	-	Sep	22	0:00	0	S
-Rule	Iran	2032	2033	-	Mar	21	0:00	1:00	D
-Rule	Iran	2032	2033	-	Sep	21	0:00	0	S
-Rule	Iran	2034	2035	-	Mar	22	0:00	1:00	D
-Rule	Iran	2034	2035	-	Sep	22	0:00	0	S
+Rule	Iran	1978	1980	-	Mar	21	0:00	1:00	-
+Rule	Iran	1978	only	-	Oct	21	0:00	0	-
+Rule	Iran	1979	only	-	Sep	19	0:00	0	-
+Rule	Iran	1980	only	-	Sep	23	0:00	0	-
+Rule	Iran	1991	only	-	May	 3	0:00	1:00	-
+Rule	Iran	1992	1995	-	Mar	22	0:00	1:00	-
+Rule	Iran	1991	1995	-	Sep	22	0:00	0	-
+Rule	Iran	1996	only	-	Mar	21	0:00	1:00	-
+Rule	Iran	1996	only	-	Sep	21	0:00	0	-
+Rule	Iran	1997	1999	-	Mar	22	0:00	1:00	-
+Rule	Iran	1997	1999	-	Sep	22	0:00	0	-
+Rule	Iran	2000	only	-	Mar	21	0:00	1:00	-
+Rule	Iran	2000	only	-	Sep	21	0:00	0	-
+Rule	Iran	2001	2003	-	Mar	22	0:00	1:00	-
+Rule	Iran	2001	2003	-	Sep	22	0:00	0	-
+Rule	Iran	2004	only	-	Mar	21	0:00	1:00	-
+Rule	Iran	2004	only	-	Sep	21	0:00	0	-
+Rule	Iran	2005	only	-	Mar	22	0:00	1:00	-
+Rule	Iran	2005	only	-	Sep	22	0:00	0	-
+Rule	Iran	2008	only	-	Mar	21	0:00	1:00	-
+Rule	Iran	2008	only	-	Sep	21	0:00	0	-
+Rule	Iran	2009	2011	-	Mar	22	0:00	1:00	-
+Rule	Iran	2009	2011	-	Sep	22	0:00	0	-
+Rule	Iran	2012	only	-	Mar	21	0:00	1:00	-
+Rule	Iran	2012	only	-	Sep	21	0:00	0	-
+Rule	Iran	2013	2015	-	Mar	22	0:00	1:00	-
+Rule	Iran	2013	2015	-	Sep	22	0:00	0	-
+Rule	Iran	2016	only	-	Mar	21	0:00	1:00	-
+Rule	Iran	2016	only	-	Sep	21	0:00	0	-
+Rule	Iran	2017	2019	-	Mar	22	0:00	1:00	-
+Rule	Iran	2017	2019	-	Sep	22	0:00	0	-
+Rule	Iran	2020	only	-	Mar	21	0:00	1:00	-
+Rule	Iran	2020	only	-	Sep	21	0:00	0	-
+Rule	Iran	2021	2023	-	Mar	22	0:00	1:00	-
+Rule	Iran	2021	2023	-	Sep	22	0:00	0	-
+Rule	Iran	2024	only	-	Mar	21	0:00	1:00	-
+Rule	Iran	2024	only	-	Sep	21	0:00	0	-
+Rule	Iran	2025	2027	-	Mar	22	0:00	1:00	-
+Rule	Iran	2025	2027	-	Sep	22	0:00	0	-
+Rule	Iran	2028	2029	-	Mar	21	0:00	1:00	-
+Rule	Iran	2028	2029	-	Sep	21	0:00	0	-
+Rule	Iran	2030	2031	-	Mar	22	0:00	1:00	-
+Rule	Iran	2030	2031	-	Sep	22	0:00	0	-
+Rule	Iran	2032	2033	-	Mar	21	0:00	1:00	-
+Rule	Iran	2032	2033	-	Sep	21	0:00	0	-
+Rule	Iran	2034	2035	-	Mar	22	0:00	1:00	-
+Rule	Iran	2034	2035	-	Sep	22	0:00	0	-
 #
 # The following rules are approximations starting in the year 2038.
 # These are the best post-2037 approximations available, given the
 # restrictions of a single rule using a Gregorian-based data format.
 # At some point this table will need to be extended, though quite
 # possibly Iran will change the rules first.
-Rule	Iran	2036	max	-	Mar	21	0:00	1:00	D
-Rule	Iran	2036	max	-	Sep	21	0:00	0	S
+Rule	Iran	2036	max	-	Mar	21	0:00	1:00	-
+Rule	Iran	2036	max	-	Sep	21	0:00	0	-
 
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Asia/Tehran	3:25:44	-	LMT	1916
@@ -1219,17 +1220,17 @@
 # https://www.timeanddate.com/news/time/iraq-dumps-daylight-saving.html
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	Iraq	1982	only	-	May	1	0:00	1:00	D
-Rule	Iraq	1982	1984	-	Oct	1	0:00	0	S
-Rule	Iraq	1983	only	-	Mar	31	0:00	1:00	D
-Rule	Iraq	1984	1985	-	Apr	1	0:00	1:00	D
-Rule	Iraq	1985	1990	-	Sep	lastSun	1:00s	0	S
-Rule	Iraq	1986	1990	-	Mar	lastSun	1:00s	1:00	D
+Rule	Iraq	1982	only	-	May	1	0:00	1:00	-
+Rule	Iraq	1982	1984	-	Oct	1	0:00	0	-
+Rule	Iraq	1983	only	-	Mar	31	0:00	1:00	-
+Rule	Iraq	1984	1985	-	Apr	1	0:00	1:00	-
+Rule	Iraq	1985	1990	-	Sep	lastSun	1:00s	0	-
+Rule	Iraq	1986	1990	-	Mar	lastSun	1:00s	1:00	-
 # IATA SSIM (1991/1996) says Apr 1 12:01am UTC; guess the ':01' is a typo.
 # Shanks & Pottenger say Iraq did not observe DST 1992/1997; ignore this.
 #
-Rule	Iraq	1991	2007	-	Apr	 1	3:00s	1:00	D
-Rule	Iraq	1991	2007	-	Oct	 1	3:00s	0	S
+Rule	Iraq	1991	2007	-	Apr	 1	3:00s	1:00	-
+Rule	Iraq	1991	2007	-	Oct	 1	3:00s	0	-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Asia/Baghdad	2:57:40	-	LMT	1890
 			2:57:36	-	BMT	1918     # Baghdad Mean Time?
@@ -1501,8 +1502,7 @@
 
 # From Hideyuki Suzuki (1998-11-09):
 # 'Tokyo' usually stands for the former location of Tokyo Astronomical
-# Observatory: 139 degrees 44' 40.90" E (9h 18m 58.727s),
-# 35 degrees 39' 16.0" N.
+# Observatory: 139° 44' 40.90" E (9h 18m 58.727s), 35° 39' 16.0" N.
 # This data is from 'Rika Nenpyou (Chronological Scientific Tables) 1996'
 # edited by National Astronomical Observatory of Japan....
 # JST (Japan Standard Time) has been used since 1888-01-01 00:00 (JST).
@@ -1510,10 +1510,10 @@
 
 # From Hideyuki Suzuki (1998-11-16):
 # The ordinance No. 51 (1886) established "standard time" in Japan,
-# which stands for the time on 135 degrees E.
+# which stands for the time on 135° E.
 # In the ordinance No. 167 (1895), "standard time" was renamed to "central
 # standard time".  And the same ordinance also established "western standard
-# time", which stands for the time on 120 degrees E....  But "western standard
+# time", which stands for the time on 120° E....  But "western standard
 # time" was abolished in the ordinance No. 529 (1937).  In the ordinance No.
 # 167, there is no mention regarding for what place western standard time is
 # standard....
@@ -1926,9 +1926,9 @@
 # From 2005-08-12 our GMT-offset is +6, w/o any daylight saving.
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	Kyrgyz	1992	1996	-	Apr	Sun>=7	0:00s	1:00	S
+Rule	Kyrgyz	1992	1996	-	Apr	Sun>=7	0:00s	1:00	-
 Rule	Kyrgyz	1992	1996	-	Sep	lastSun	0:00	0	-
-Rule	Kyrgyz	1997	2005	-	Mar	lastSun	2:30	1:00	S
+Rule	Kyrgyz	1997	2005	-	Mar	lastSun	2:30	1:00	-
 Rule	Kyrgyz	1997	2004	-	Oct	lastSun	2:30	0	-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Asia/Bishkek	4:58:24 -	LMT	1924 May  2
@@ -2060,7 +2060,7 @@
 
 # Malaysia
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	NBorneo	1935	1941	-	Sep	14	0:00	0:20	TS # one-Third Summer
+Rule	NBorneo	1935	1941	-	Sep	14	0:00	0:20	-
 Rule	NBorneo	1935	1941	-	Dec	14	0:00	0	-
 #
 # peninsular Malaysia
@@ -2205,7 +2205,7 @@
 # http://zasag.mn/news/view/8969
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	Mongol	1983	1984	-	Apr	1	0:00	1:00	S
+Rule	Mongol	1983	1984	-	Apr	1	0:00	1:00	-
 Rule	Mongol	1983	only	-	Oct	1	0:00	0	-
 # Shanks & Pottenger and IATA SSIM say 1990s switches occurred at 00:00,
 # but McDow says the 2001 switches occurred at 02:00.  Also, IATA SSIM
@@ -2222,13 +2222,13 @@
 # Mongolian Government meeting has concluded today to cancel daylight
 # saving time adoption in Mongolia.  Source: http://zasag.mn/news/view/16192
 
-Rule	Mongol	1985	1998	-	Mar	lastSun	0:00	1:00	S
+Rule	Mongol	1985	1998	-	Mar	lastSun	0:00	1:00	-
 Rule	Mongol	1984	1998	-	Sep	lastSun	0:00	0	-
 # IATA SSIM (1999-09) says Mongolia no longer observes DST.
-Rule	Mongol	2001	only	-	Apr	lastSat	2:00	1:00	S
+Rule	Mongol	2001	only	-	Apr	lastSat	2:00	1:00	-
 Rule	Mongol	2001	2006	-	Sep	lastSat	2:00	0	-
-Rule	Mongol	2002	2006	-	Mar	lastSat	2:00	1:00	S
-Rule	Mongol	2015	2016	-	Mar	lastSat	2:00	1:00	S
+Rule	Mongol	2002	2006	-	Mar	lastSat	2:00	1:00	-
+Rule	Mongol	2015	2016	-	Mar	lastSat	2:00	1:00	-
 Rule	Mongol	2015	2016	-	Sep	lastSat	0:00	0	-
 
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
@@ -2662,9 +2662,6 @@
 # [Google translation]: "The Council also decided to start daylight
 # saving in Palestine as of one o'clock on Saturday morning,
 # 2016-03-26, to provide the clock 60 minutes ahead."
-#
-# From Paul Eggert (2016-03-12):
-# Predict spring transitions on March's last Saturday at 01:00 from now on.
 
 # From Sharef Mustafa (2016-10-19):
 # [T]he Palestinian cabinet decision (Mar 8th 2016) published on
@@ -2681,6 +2678,16 @@
 # https://www.timeanddate.com/time/change/gaza-strip/gaza
 # https://www.timeanddate.com/time/change/west-bank/hebron
 
+# From Sharef Mustafa (2018-03-16):
+# Palestine summer time will start on Mar 24th 2018 by advancing the
+# clock by 60 minutes as per Palestinian cabinet decision published on
+# the offical website, though the decree did not specify the exact
+# time of the time shift.
+# http://www.palestinecabinet.gov.ps/Website/AR/NDecrees/ViewFile.ashx?ID=e7a42ab7-ee23-435a-b9c8-a4f7e81f3817
+#
+# From Paul Eggert (2018-03-16):
+# For 2016 on, predict spring transitions on March's fourth Saturday at 01:00.
+
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 Rule EgyptAsia	1957	only	-	May	10	0:00	1:00	S
 Rule EgyptAsia	1957	1958	-	Oct	 1	0:00	0	-
@@ -2710,7 +2717,7 @@
 Rule Palestine	2013	only	-	Sep	Fri>=21	0:00	0	-
 Rule Palestine	2014	2015	-	Oct	Fri>=21	0:00	0	-
 Rule Palestine	2015	only	-	Mar	lastFri	24:00	1:00	S
-Rule Palestine	2016	max	-	Mar	lastSat	1:00	1:00	S
+Rule Palestine	2016	max	-	Mar	Sat>=22	1:00	1:00	S
 Rule Palestine	2016	max	-	Oct	lastSat	1:00	0	-
 
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
@@ -2760,11 +2767,11 @@
 # http://www.philstar.com/headlines/2014/08/05/1354152/pnoy-urged-declare-use-daylight-saving-time
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	Phil	1936	only	-	Nov	1	0:00	1:00	S
+Rule	Phil	1936	only	-	Nov	1	0:00	1:00	-
 Rule	Phil	1937	only	-	Feb	1	0:00	0	-
-Rule	Phil	1954	only	-	Apr	12	0:00	1:00	S
+Rule	Phil	1954	only	-	Apr	12	0:00	1:00	-
 Rule	Phil	1954	only	-	Jul	1	0:00	0	-
-Rule	Phil	1978	only	-	Mar	22	0:00	1:00	S
+Rule	Phil	1978	only	-	Mar	22	0:00	1:00	-
 Rule	Phil	1978	only	-	Sep	21	0:00	0	-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Asia/Manila	-15:56:00 -	LMT	1844 Dec 31
@@ -3120,9 +3127,9 @@
 # and is the basis for the information below.
 #
 # The 1906 transition was effective July 1 and standardized Indochina to
-# Phù Liễn Observatory, legally 104 deg. 17'17" east of Paris.
+# Phù Liễn Observatory, legally 104° 17' 17" east of Paris.
 # It's unclear whether this meant legal Paris Mean Time (00:09:21) or
-# the Paris Meridian (2 deg. 20'14.03" E); the former yields 07:06:30.1333...
+# the Paris Meridian (2° 20' 14.03" E); the former yields 07:06:30.1333...
 # and the latter 07:06:29.333... so either way it rounds to 07:06:30,
 # which is used below even though the modern-day Phù Liễn Observatory
 # is closer to 07:06:31.  Abbreviate Phù Liễn Mean Time as PLMT.
--- a/make/data/tzdata/australasia	Mon Apr 09 13:35:19 2018 +0200
+++ b/make/data/tzdata/australasia	Mon Apr 09 04:43:03 2018 -0700
@@ -219,20 +219,20 @@
 
 # Lord Howe Island
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	LH	1981	1984	-	Oct	lastSun	2:00	1:00	D
-Rule	LH	1982	1985	-	Mar	Sun>=1	2:00	0	S
-Rule	LH	1985	only	-	Oct	lastSun	2:00	0:30	D
-Rule	LH	1986	1989	-	Mar	Sun>=15	2:00	0	S
-Rule	LH	1986	only	-	Oct	19	2:00	0:30	D
-Rule	LH	1987	1999	-	Oct	lastSun	2:00	0:30	D
-Rule	LH	1990	1995	-	Mar	Sun>=1	2:00	0	S
-Rule	LH	1996	2005	-	Mar	lastSun	2:00	0	S
-Rule	LH	2000	only	-	Aug	lastSun	2:00	0:30	D
-Rule	LH	2001	2007	-	Oct	lastSun	2:00	0:30	D
-Rule	LH	2006	only	-	Apr	Sun>=1	2:00	0	S
-Rule	LH	2007	only	-	Mar	lastSun	2:00	0	S
-Rule	LH	2008	max	-	Apr	Sun>=1	2:00	0	S
-Rule	LH	2008	max	-	Oct	Sun>=1	2:00	0:30	D
+Rule	LH	1981	1984	-	Oct	lastSun	2:00	1:00	-
+Rule	LH	1982	1985	-	Mar	Sun>=1	2:00	0	-
+Rule	LH	1985	only	-	Oct	lastSun	2:00	0:30	-
+Rule	LH	1986	1989	-	Mar	Sun>=15	2:00	0	-
+Rule	LH	1986	only	-	Oct	19	2:00	0:30	-
+Rule	LH	1987	1999	-	Oct	lastSun	2:00	0:30	-
+Rule	LH	1990	1995	-	Mar	Sun>=1	2:00	0	-
+Rule	LH	1996	2005	-	Mar	lastSun	2:00	0	-
+Rule	LH	2000	only	-	Aug	lastSun	2:00	0:30	-
+Rule	LH	2001	2007	-	Oct	lastSun	2:00	0:30	-
+Rule	LH	2006	only	-	Apr	Sun>=1	2:00	0	-
+Rule	LH	2007	only	-	Mar	lastSun	2:00	0	-
+Rule	LH	2008	max	-	Apr	Sun>=1	2:00	0	-
+Rule	LH	2008	max	-	Oct	Sun>=1	2:00	0:30	-
 Zone Australia/Lord_Howe 10:36:20 -	LMT	1895 Feb
 			10:00	-	AEST	1981 Mar
 			10:30	LH	+1030/+1130 1985 Jul
@@ -390,15 +390,15 @@
 # practice than guessing no DST.
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	Fiji	1998	1999	-	Nov	Sun>=1	2:00	1:00	S
+Rule	Fiji	1998	1999	-	Nov	Sun>=1	2:00	1:00	-
 Rule	Fiji	1999	2000	-	Feb	lastSun	3:00	0	-
-Rule	Fiji	2009	only	-	Nov	29	2:00	1:00	S
+Rule	Fiji	2009	only	-	Nov	29	2:00	1:00	-
 Rule	Fiji	2010	only	-	Mar	lastSun	3:00	0	-
-Rule	Fiji	2010	2013	-	Oct	Sun>=21	2:00	1:00	S
+Rule	Fiji	2010	2013	-	Oct	Sun>=21	2:00	1:00	-
 Rule	Fiji	2011	only	-	Mar	Sun>=1	3:00	0	-
 Rule	Fiji	2012	2013	-	Jan	Sun>=18	3:00	0	-
 Rule	Fiji	2014	only	-	Jan	Sun>=18	2:00	0	-
-Rule	Fiji	2014	max	-	Nov	Sun>=1	2:00	1:00	S
+Rule	Fiji	2014	max	-	Nov	Sun>=1	2:00	1:00	-
 Rule	Fiji	2015	max	-	Jan	Sun>=14	3:00	0	-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Pacific/Fiji	11:55:44 -	LMT	1915 Oct 26 # Suva
@@ -429,11 +429,11 @@
 			 12:00	-	+12
 Zone Pacific/Enderbury	-11:24:20 -	LMT	1901
 			-12:00	-	-12	1979 Oct
-			-11:00	-	-11	1995
+			-11:00	-	-11	1994 Dec 31
 			 13:00	-	+13
 Zone Pacific/Kiritimati	-10:29:20 -	LMT	1901
 			-10:40	-	-1040	1979 Oct
-			-10:00	-	-10	1995
+			-10:00	-	-10	1994 Dec 31
 			 14:00	-	+14
 
 # N Mariana Is
@@ -470,9 +470,9 @@
 
 # New Caledonia
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	NC	1977	1978	-	Dec	Sun>=1	0:00	1:00	S
+Rule	NC	1977	1978	-	Dec	Sun>=1	0:00	1:00	-
 Rule	NC	1978	1979	-	Feb	27	0:00	0	-
-Rule	NC	1996	only	-	Dec	 1	2:00s	1:00	S
+Rule	NC	1996	only	-	Dec	 1	2:00s	1:00	-
 # Shanks & Pottenger say the following was at 2:00; go with IATA.
 Rule	NC	1997	only	-	Mar	 2	2:00s	0	-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
@@ -492,27 +492,28 @@
 Rule	NZ	1934	1940	-	Apr	lastSun	2:00	0	M
 Rule	NZ	1934	1940	-	Sep	lastSun	2:00	0:30	S
 Rule	NZ	1946	only	-	Jan	 1	0:00	0	S
-# Since 1957 Chatham has been 45 minutes ahead of NZ, but there's no
-# convenient single notation for the date and time of this transition
-# so we must duplicate the Rule lines.
+# Since 1957 Chatham has been 45 minutes ahead of NZ, but until 2018a
+# there was no documented single notation for the date and time of this
+# transition.  Duplicate the Rule lines for now, to give the 2018a change
+# time to percolate out.
 Rule	NZ	1974	only	-	Nov	Sun>=1	2:00s	1:00	D
-Rule	Chatham	1974	only	-	Nov	Sun>=1	2:45s	1:00	D
+Rule	Chatham	1974	only	-	Nov	Sun>=1	2:45s	1:00	-
 Rule	NZ	1975	only	-	Feb	lastSun	2:00s	0	S
-Rule	Chatham	1975	only	-	Feb	lastSun	2:45s	0	S
+Rule	Chatham	1975	only	-	Feb	lastSun	2:45s	0	-
 Rule	NZ	1975	1988	-	Oct	lastSun	2:00s	1:00	D
-Rule	Chatham	1975	1988	-	Oct	lastSun	2:45s	1:00	D
+Rule	Chatham	1975	1988	-	Oct	lastSun	2:45s	1:00	-
 Rule	NZ	1976	1989	-	Mar	Sun>=1	2:00s	0	S
-Rule	Chatham	1976	1989	-	Mar	Sun>=1	2:45s	0	S
+Rule	Chatham	1976	1989	-	Mar	Sun>=1	2:45s	0	-
 Rule	NZ	1989	only	-	Oct	Sun>=8	2:00s	1:00	D
-Rule	Chatham	1989	only	-	Oct	Sun>=8	2:45s	1:00	D
+Rule	Chatham	1989	only	-	Oct	Sun>=8	2:45s	1:00	-
 Rule	NZ	1990	2006	-	Oct	Sun>=1	2:00s	1:00	D
-Rule	Chatham	1990	2006	-	Oct	Sun>=1	2:45s	1:00	D
+Rule	Chatham	1990	2006	-	Oct	Sun>=1	2:45s	1:00	-
 Rule	NZ	1990	2007	-	Mar	Sun>=15	2:00s	0	S
-Rule	Chatham	1990	2007	-	Mar	Sun>=15	2:45s	0	S
+Rule	Chatham	1990	2007	-	Mar	Sun>=15	2:45s	0	-
 Rule	NZ	2007	max	-	Sep	lastSun	2:00s	1:00	D
-Rule	Chatham	2007	max	-	Sep	lastSun	2:45s	1:00	D
+Rule	Chatham	2007	max	-	Sep	lastSun	2:45s	1:00	-
 Rule	NZ	2008	max	-	Apr	Sun>=1	2:00s	0	S
-Rule	Chatham	2008	max	-	Apr	Sun>=1	2:45s	0	S
+Rule	Chatham	2008	max	-	Apr	Sun>=1	2:45s	0	-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone Pacific/Auckland	11:39:04 -	LMT	1868 Nov  2
 			11:30	NZ	NZ%sT	1946 Jan  1
@@ -536,9 +537,9 @@
 # Cook Is
 # From Shanks & Pottenger:
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	Cook	1978	only	-	Nov	12	0:00	0:30	HS
+Rule	Cook	1978	only	-	Nov	12	0:00	0:30	-
 Rule	Cook	1979	1991	-	Mar	Sun>=1	0:00	0	-
-Rule	Cook	1979	1990	-	Oct	lastSun	0:00	0:30	HS
+Rule	Cook	1979	1990	-	Oct	lastSun	0:00	0:30	-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone Pacific/Rarotonga	-10:39:04 -	LMT	1901        # Avarua
 			-10:30	-	-1030	1978 Nov 12
@@ -679,11 +680,11 @@
 # Assume the pattern instituted in 2012 will continue indefinitely.
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	WS	2010	only	-	Sep	lastSun	0:00	1	D
-Rule	WS	2011	only	-	Apr	Sat>=1	4:00	0	S
-Rule	WS	2011	only	-	Sep	lastSat	3:00	1	D
-Rule	WS	2012	max	-	Apr	Sun>=1	4:00	0	S
-Rule	WS	2012	max	-	Sep	lastSun	3:00	1	D
+Rule	WS	2010	only	-	Sep	lastSun	0:00	1	-
+Rule	WS	2011	only	-	Apr	Sat>=1	4:00	0	-
+Rule	WS	2011	only	-	Sep	lastSat	3:00	1	-
+Rule	WS	2012	max	-	Apr	Sun>=1	4:00	0	-
+Rule	WS	2012	max	-	Sep	lastSun	3:00	1	-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone Pacific/Apia	 12:33:04 -	LMT	1892 Jul  5
 			-11:26:56 -	LMT	1911
@@ -723,11 +724,11 @@
 
 # Tonga
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	Tonga	1999	only	-	Oct	 7	2:00s	1:00	S
+Rule	Tonga	1999	only	-	Oct	 7	2:00s	1:00	-
 Rule	Tonga	2000	only	-	Mar	19	2:00s	0	-
-Rule	Tonga	2000	2001	-	Nov	Sun>=1	2:00	1:00	S
+Rule	Tonga	2000	2001	-	Nov	Sun>=1	2:00	1:00	-
 Rule	Tonga	2001	2002	-	Jan	lastSun	2:00	0	-
-Rule	Tonga	2016	only	-	Nov	Sun>=1	2:00	1:00	S
+Rule	Tonga	2016	only	-	Nov	Sun>=1	2:00	1:00	-
 Rule	Tonga	2017	only	-	Jan	Sun>=15	3:00	0	-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone Pacific/Tongatapu	12:19:20 -	LMT	1901
@@ -804,12 +805,12 @@
 
 # Vanuatu
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	Vanuatu	1983	only	-	Sep	25	0:00	1:00	S
+Rule	Vanuatu	1983	only	-	Sep	25	0:00	1:00	-
 Rule	Vanuatu	1984	1991	-	Mar	Sun>=23	0:00	0	-
-Rule	Vanuatu	1984	only	-	Oct	23	0:00	1:00	S
-Rule	Vanuatu	1985	1991	-	Sep	Sun>=23	0:00	1:00	S
+Rule	Vanuatu	1984	only	-	Oct	23	0:00	1:00	-
+Rule	Vanuatu	1985	1991	-	Sep	Sun>=23	0:00	1:00	-
 Rule	Vanuatu	1992	1993	-	Jan	Sun>=23	0:00	0	-
-Rule	Vanuatu	1992	only	-	Oct	Sun>=23	0:00	1:00	S
+Rule	Vanuatu	1992	only	-	Oct	Sun>=23	0:00	1:00	-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Pacific/Efate	11:13:16 -	LMT	1912 Jan 13 # Vila
 			11:00	Vanuatu	+11/+12
@@ -1108,6 +1109,13 @@
 # South Australian time even though it's located in Western Australia.
 
 # Queensland
+
+# From Paul Eggert (2018-02-26):
+# I lack access to the following source for Queensland DST:
+# Pearce C. History of daylight saving time in Queensland.
+# Queensland Hist J. 2017 Aug;23(6):389-403
+# https://search.informit.com.au/documentSummary;dn=994682348436426;res=IELHSS
+
 # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
 # #   The state of QUEENSLAND.. [ Courtesy Qld. Dept Premier Econ&Trade Devel ]
 # #						[ Dec 1990 ]
@@ -1534,6 +1542,12 @@
 # "declared it the same day [throughout] the country as of Jan. 1, 1995"
 # as part of the competition to be first into the 21st century.
 
+# From Kerry Shetline (2018-02-03):
+# December 31 was the day that was skipped, so that the transition
+# would be from Friday December 30, 1994 to Sunday January 1, 1995.
+# From Paul Eggert (2018-02-04):
+# One source for this is page 202 of: Bartky IR. One Time Fits All:
+# The Campaigns for Global Uniformity (2007).
 
 # Kwajalein
 
@@ -1626,7 +1640,7 @@
 
 # From Howie Phelps (1999-11-10), who talked to a Pitcairner via shortwave:
 # Betty Christian told me yesterday that their local time is the same as
-# Pacific Standard Time. They used to be 1/2 hour different from us here in
+# Pacific Standard Time. They used to be ½ hour different from us here in
 # Sacramento but it was changed a couple of years ago.
 
 
@@ -1665,7 +1679,7 @@
 # 12 hours and 20 minutes ahead of GMT.  When New Zealand adjusted its
 # standard time in 1940s, Tonga had the choice of subtracting from its
 # local time to come on the same standard time as New Zealand or of
-# advancing its time to maintain the differential of 13 degrees
+# advancing its time to maintain the differential of 13°
 # (approximately 50 minutes ahead of New Zealand time).
 #
 # Because His Majesty King Tāufaʻāhau Tupou IV, then Crown Prince
--- a/make/data/tzdata/europe	Mon Apr 09 13:35:19 2018 +0200
+++ b/make/data/tzdata/europe	Mon Apr 09 04:43:03 2018 -0700
@@ -140,8 +140,8 @@
 # along the towpath within a few yards of it.'
 #
 # I have a one inch to one mile map of London and my estimate of the stone's
-# position is 51 degrees 28' 30" N, 0 degrees 18' 45" W. The longitude should
-# be within about +-2". The Ordnance Survey grid reference is TQ172761.
+# position is 51° 28' 30" N, 0° 18' 45" W. The longitude should
+# be within about ±2". The Ordnance Survey grid reference is TQ172761.
 #
 # [This yields GMTOFF = -0:01:15 for London LMT in the 18th century.]
 
@@ -181,7 +181,7 @@
 # after-hours daylight in which to pursue his research.
 # In 1895 he presented a paper to the Wellington Philosophical Society
 # that proposed a two-hour daylight-saving shift.  See:
-# Hudson GV. On seasonal time-adjustment in countries south of lat. 30 deg.
+# Hudson GV. On seasonal time-adjustment in countries south of lat. 30°.
 # Transactions and Proceedings of the New Zealand Institute. 1895;28:734
 # http://rsnz.natlib.govt.nz/volume/rsnz_28/rsnz_28_00_006110.html
 # Although some interest was expressed in New Zealand, his proposal
@@ -531,11 +531,25 @@
 Link	Europe/London	Europe/Guernsey
 Link	Europe/London	Europe/Isle_of_Man
 
-# From Paul Eggert (2018-01-19):
+# From Paul Eggert (2018-02-15):
+# In January 2018 we discovered that the negative SAVE values in the
+# Eire rules cause problems with tests for ICU:
+# https://mm.icann.org/pipermail/tz/2018-January/025825.html
+# and with tests for OpenJDK:
+# https://mm.icann.org/pipermail/tz/2018-January/025822.html
+#
+# To work around this problem, the build procedure can translate the
+# following data into two forms, one with negative SAVE values and the
+# other form with a traditional approximation for Irish time stamps
+# after 1971-10-31 02:00 UTC; although this approximation has tm_isdst
+# flags that are reversed, its UTC offsets are correct and this often
+# suffices.  This source file currently uses only nonnegative SAVE
+# values, but this is intended to change and downstream code should
+# not rely on it.
+#
 # The following is like GB-Eire and EU, except with standard time in
-# summer and negative daylight saving time in winter.
-# Although currently commented out, this will need to become uncommented
-# once the ICU/OpenJDK workaround is removed; see below.
+# summer and negative daylight saving time in winter.  It is for when
+# negative SAVE values are used.
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 #Rule	Eire	1971	only	-	Oct	31	 2:00u	-1:00	GMT
 #Rule	Eire	1972	1980	-	Mar	Sun>=16	 2:00u	0	IST
@@ -556,24 +570,12 @@
 			 0:00	1:00	IST	1947 Nov  2  2:00s
 			 0:00	-	GMT	1948 Apr 18  2:00s
 			 0:00	GB-Eire	GMT/IST	1968 Oct 27
-# From Paul Eggert (2018-01-18):
-# The next line should look like this:
+# The next line is for when negative SAVE values are used.
 #			 1:00	Eire	IST/GMT
-# However, in January 2018 we discovered that the Eire rules cause
-# problems with tests for ICU:
-# https://mm.icann.org/pipermail/tz/2018-January/025825.html
-# and with tests for OpenJDK:
-# https://mm.icann.org/pipermail/tz/2018-January/025822.html
-# To work around this problem, use a traditional approximation for
-# time stamps after 1971-10-31 02:00 UTC, to give ICU and OpenJDK
-# developers breathing room to fix bugs.  This approximation has
-# correct UTC offsets, but results in tm_isdst flags are the reverse
-# of what they should be.  This workaround is temporary and should be
-# removed reasonably soon.
+# These three lines are for when SAVE values are always nonnegative.
 			 1:00	-	IST	1971 Oct 31  2:00u
 			 0:00	GB-Eire	GMT/IST	1996
 			 0:00	EU	GMT/IST
-# End of workaround for ICU and OpenJDK bugs.
 
 
 ###############################################################################
@@ -1557,21 +1559,21 @@
 # http://www.almanak.hi.is/klukkan.html
 #
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	Iceland	1917	1919	-	Feb	19	23:00	1:00	S
+Rule	Iceland	1917	1919	-	Feb	19	23:00	1:00	-
 Rule	Iceland	1917	only	-	Oct	21	 1:00	0	-
 Rule	Iceland	1918	1919	-	Nov	16	 1:00	0	-
-Rule	Iceland	1921	only	-	Mar	19	23:00	1:00	S
+Rule	Iceland	1921	only	-	Mar	19	23:00	1:00	-
 Rule	Iceland	1921	only	-	Jun	23	 1:00	0	-
-Rule	Iceland	1939	only	-	Apr	29	23:00	1:00	S
+Rule	Iceland	1939	only	-	Apr	29	23:00	1:00	-
 Rule	Iceland	1939	only	-	Oct	29	 2:00	0	-
-Rule	Iceland	1940	only	-	Feb	25	 2:00	1:00	S
+Rule	Iceland	1940	only	-	Feb	25	 2:00	1:00	-
 Rule	Iceland	1940	1941	-	Nov	Sun>=2	 1:00s	0	-
-Rule	Iceland	1941	1942	-	Mar	Sun>=2	 1:00s	1:00	S
+Rule	Iceland	1941	1942	-	Mar	Sun>=2	 1:00s	1:00	-
 # 1943-1946 - first Sunday in March until first Sunday in winter
-Rule	Iceland	1943	1946	-	Mar	Sun>=1	 1:00s	1:00	S
+Rule	Iceland	1943	1946	-	Mar	Sun>=1	 1:00s	1:00	-
 Rule	Iceland	1942	1948	-	Oct	Sun>=22	 1:00s	0	-
 # 1947-1967 - first Sunday in April until first Sunday in winter
-Rule	Iceland	1947	1967	-	Apr	Sun>=1	 1:00s	1:00	S
+Rule	Iceland	1947	1967	-	Apr	Sun>=1	 1:00s	1:00	-
 # 1949 and 1967 Oct transitions delayed by 1 week
 Rule	Iceland	1949	only	-	Oct	30	 1:00s	0	-
 Rule	Iceland	1950	1966	-	Oct	Sun>=22	 1:00s	0	-
@@ -2161,15 +2163,19 @@
 			1:00	EU	CE%sT
 
 # Portugal
-#
+
 # From Paul Eggert (2014-08-11), after a heads-up from Stephen Colebourne:
 # According to a Portuguese decree (1911-05-26)
 # https://dre.pt/application/dir/pdf1sdip/1911/05/12500/23132313.pdf
 # Lisbon was at -0:36:44.68, but switched to GMT on 1912-01-01 at 00:00.
-# Round the old offset to -0:36:45.  This agrees with Willett but disagrees
-# with Shanks, who says the transition occurred on 1911-05-24 at 00:00 for
-# Europe/Lisbon, Atlantic/Azores, and Atlantic/Madeira.
+# Round the old offset to -0:36:45.  This agrees with Willett....
 #
+# From Michael Deckers (2018-02-15):
+# article 5 [of the 1911 decree; Deckers's translation] ...:
+# These dispositions shall enter into force at the instant at which,
+# according to the 2nd article, the civil day January 1, 1912 begins,
+# all clocks therefore having to be advanced or set back correspondingly ...
+
 # From Rui Pedro Salgueiro (1992-11-12):
 # Portugal has recently (September, 27) changed timezone
 # (from WET to MET or CET) to harmonize with EEC.
@@ -2252,7 +2258,7 @@
 #
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Europe/Lisbon	-0:36:45 -	LMT	1884
-			-0:36:45 -	LMT	1912 Jan  1 # Lisbon Mean Time
+			-0:36:45 -	LMT	1912 Jan  1  0:00u # Lisbon MT
 			 0:00	Port	WE%sT	1966 Apr  3  2:00
 			 1:00	-	CET	1976 Sep 26  1:00
 			 0:00	Port	WE%sT	1983 Sep 25  1:00s
@@ -2261,7 +2267,7 @@
 			 0:00	EU	WE%sT
 # This Zone can be simplified once we assume zic %z.
 Zone Atlantic/Azores	-1:42:40 -	LMT	1884        # Ponta Delgada
-			-1:54:32 -	HMT	1912 Jan  1 # Horta Mean Time
+			-1:54:32 -	HMT	1912 Jan  1  2:00u # Horta MT
 			-2:00	Port	-02/-01	1942 Apr 25 22:00s
 			-2:00	Port	+00	1942 Aug 15 22:00s
 			-2:00	Port	-02/-01	1943 Apr 17 22:00s
@@ -2277,7 +2283,7 @@
 			-1:00	EU	-01/+00
 # This Zone can be simplified once we assume zic %z.
 Zone Atlantic/Madeira	-1:07:36 -	LMT	1884        # Funchal
-			-1:07:36 -	FMT	1912 Jan  1 # Funchal Mean Time
+			-1:07:36 -	FMT	1912 Jan  1  1:00u # Funchal MT
 			-1:00	Port	-01/+00	1942 Apr 25 22:00s
 			-1:00	Port	+01	1942 Aug 15 22:00s
 			-1:00	Port	-01/+00	1943 Apr 17 22:00s
@@ -2615,13 +2621,13 @@
 
 # From Vladimir Karpinsky (2014-07-08):
 # LMT in Moscow (before Jul 3, 1916) is 2:30:17, that was defined by Moscow
-# Observatory (coordinates: 55 deg. 45'29.70", 37 deg. 34'05.30")....
+# Observatory (coordinates: 55° 45' 29.70", 37° 34' 05.30")....
 # LMT in Moscow since Jul 3, 1916 is 2:31:01 as a result of new standard.
 # (The info is from the book by Byalokoz ... p. 18.)
 # The time in St. Petersburg as capital of Russia was defined by
 # Pulkov observatory, near St. Petersburg.  In 1916 LMT Moscow
 # was synchronized with LMT St. Petersburg (+30 minutes), (Pulkov observatory
-# coordinates: 59 deg. 46'18.70", 30 deg. 19'40.70") so 30 deg. 19'40.70" >
+# coordinates: 59° 46' 18.70", 30° 19' 40.70") so 30° 19' 40.70" >
 # 2h01m18.7s = 2:01:19.  LMT Moscow = LMT St.Petersburg + 30m 2:01:19 + 0:30 =
 # 2:31:19 ...
 #
@@ -3450,7 +3456,7 @@
 # three degrees, or twelve minutes of time, to the west of the
 # meridian of the Observatory of Stockholm".  The law is dated 1878-05-31.
 #
-# The observatory at that time had the meridian 18 degrees 03' 30"
+# The observatory at that time had the meridian 18° 03' 30"
 # eastern longitude = 01:12:14 in time.  Less 12 minutes gives the
 # national standard time as 01:00:14 ahead of GMT....
 #
@@ -3554,7 +3560,7 @@
 # From Alois Treindl (2013-09-11):
 # The Federal regulations say
 # https://www.admin.ch/opc/de/classified-compilation/20071096/index.html
-# ... the meridian for Bern mean time ... is 7 degrees 26' 22.50".
+# ... the meridian for Bern mean time ... is 7° 26' 22.50".
 # Expressed in time, it is 0h29m45.5s.
 
 # From Pierre-Yves Berger (2013-09-11):
--- a/make/data/tzdata/northamerica	Mon Apr 09 13:35:19 2018 +0200
+++ b/make/data/tzdata/northamerica	Mon Apr 09 04:43:03 2018 -0700
@@ -48,7 +48,7 @@
 # in New York City (1869-10).  His 1870 proposal was based on Washington, DC,
 # but in 1872-05 he moved the proposed origin to Greenwich.
 
-# From Paul Eggert (2016-09-21):
+# From Paul Eggert (2018-03-20):
 # Dowd's proposal left many details unresolved, such as where to draw
 # lines between time zones.  The key individual who made time zones
 # work in the US was William Frederick Allen - railway engineer,
@@ -59,10 +59,9 @@
 # to the General Time Convention on 1883-04-11, saying that his plan
 # meant "local time would be practically abolished" - a plus for
 # railway scheduling.  By the next convention on 1883-10-11 nearly all
-# railroads had agreed and it took effect on 1883-11-18 at 12:00.
-# That Sunday was called the "day of two noons", as the eastern parts
-# of the new zones observed noon twice.  Allen witnessed the
-# transition in New York City, writing:
+# railroads had agreed and it took effect on 1883-11-18.  That Sunday
+# was called the "day of two noons", as some locations observed noon
+# twice.  Allen witnessed the transition in New York City, writing:
 #
 #   I heard the bells of St. Paul's strike on the old time.  Four
 #   minutes later, obedient to the electrical signal from the Naval
@@ -447,8 +446,7 @@
 # ...according to the Census Bureau, the largest city is Beulah (although
 # it's commonly referred to as Beulah-Hazen, with Hazen being the next
 # largest city in Mercer County).  Google Maps places Beulah's city hall
-# at 47 degrees 15' 51" N, 101 degrees 46' 40" W, which yields an offset
-# of 6h47'07".
+# at 47° 15' 51" N, 101° 46' 40" W, which yields an offset of 6h47'07".
 
 Zone America/North_Dakota/Beulah -6:47:07 - LMT	1883 Nov 18 12:12:53
 			-7:00	US	M%sT	2010 Nov  7  2:00
@@ -481,7 +479,7 @@
 # California, northern Idaho (Benewah, Bonner, Boundary, Clearwater,
 # Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, Idaho county
 # north of the Salmon River, and the towns of Burgdorf and Warren),
-# Nevada (except West Wendover), Oregon (except the northern 3/4 of
+# Nevada (except West Wendover), Oregon (except the northern ¾ of
 # Malheur county), and Washington
 
 # From Paul Eggert (2016-08-20):
@@ -979,6 +977,13 @@
 			-5:00	-	EST	2006
 			-5:00	US	E%sT
 
+# From Paul Eggert (2018-03-20):
+# The Louisville & Nashville Railroad's 1883-11-18 change occurred at
+# 10:00 old local time; train were supposed to come to a standstill
+# for precisely 18 minutes.  See Bartky Fig. 1 (page 50).  It is not
+# clear how this matched civil time in Louisville, so for now continue
+# to assume Louisville switched at noon new local time, like New York.
+#
 # Part of Kentucky left its clocks alone in 1974.
 # This also includes Clark, Floyd, and Harrison counties in Indiana.
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
@@ -3287,8 +3292,8 @@
 # http://www.jamaicaobserver.com/columns/The-politician-in-all-of-us_17573647
 #
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
-Zone	America/Jamaica	-5:07:11 -	LMT	1890        # Kingston
-			-5:07:11 -	KMT	1912 Feb    # Kingston Mean Time
+Zone	America/Jamaica	-5:07:10 -	LMT	1890        # Kingston
+			-5:07:10 -	KMT	1912 Feb    # Kingston Mean Time
 			-5:00	-	EST	1974
 			-5:00	US	E%sT	1984
 			-5:00	-	EST
@@ -3438,7 +3443,7 @@
 #
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone America/Grand_Turk	-4:44:32 -	LMT	1890
-			-5:07:11 -	KMT	1912 Feb # Kingston Mean Time
+			-5:07:10 -	KMT	1912 Feb # Kingston Mean Time
 			-5:00	-	EST	1979
 			-5:00	US	E%sT	2015 Nov Sun>=1 2:00
 			-4:00	-	AST	2018 Mar 11 3:00
--- a/make/data/tzdata/southamerica	Mon Apr 09 13:35:19 2018 +0200
+++ b/make/data/tzdata/southamerica	Mon Apr 09 04:43:03 2018 -0700
@@ -70,28 +70,28 @@
 # AR was chosen because they are the ISO letters that represent Argentina.
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	Arg	1930	only	-	Dec	 1	0:00	1:00	S
+Rule	Arg	1930	only	-	Dec	 1	0:00	1:00	-
 Rule	Arg	1931	only	-	Apr	 1	0:00	0	-
-Rule	Arg	1931	only	-	Oct	15	0:00	1:00	S
+Rule	Arg	1931	only	-	Oct	15	0:00	1:00	-
 Rule	Arg	1932	1940	-	Mar	 1	0:00	0	-
-Rule	Arg	1932	1939	-	Nov	 1	0:00	1:00	S
-Rule	Arg	1940	only	-	Jul	 1	0:00	1:00	S
+Rule	Arg	1932	1939	-	Nov	 1	0:00	1:00	-
+Rule	Arg	1940	only	-	Jul	 1	0:00	1:00	-
 Rule	Arg	1941	only	-	Jun	15	0:00	0	-
-Rule	Arg	1941	only	-	Oct	15	0:00	1:00	S
+Rule	Arg	1941	only	-	Oct	15	0:00	1:00	-
 Rule	Arg	1943	only	-	Aug	 1	0:00	0	-
-Rule	Arg	1943	only	-	Oct	15	0:00	1:00	S
+Rule	Arg	1943	only	-	Oct	15	0:00	1:00	-
 Rule	Arg	1946	only	-	Mar	 1	0:00	0	-
-Rule	Arg	1946	only	-	Oct	 1	0:00	1:00	S
+Rule	Arg	1946	only	-	Oct	 1	0:00	1:00	-
 Rule	Arg	1963	only	-	Oct	 1	0:00	0	-
-Rule	Arg	1963	only	-	Dec	15	0:00	1:00	S
+Rule	Arg	1963	only	-	Dec	15	0:00	1:00	-
 Rule	Arg	1964	1966	-	Mar	 1	0:00	0	-
-Rule	Arg	1964	1966	-	Oct	15	0:00	1:00	S
+Rule	Arg	1964	1966	-	Oct	15	0:00	1:00	-
 Rule	Arg	1967	only	-	Apr	 2	0:00	0	-
-Rule	Arg	1967	1968	-	Oct	Sun>=1	0:00	1:00	S
+Rule	Arg	1967	1968	-	Oct	Sun>=1	0:00	1:00	-
 Rule	Arg	1968	1969	-	Apr	Sun>=1	0:00	0	-
-Rule	Arg	1974	only	-	Jan	23	0:00	1:00	S
+Rule	Arg	1974	only	-	Jan	23	0:00	1:00	-
 Rule	Arg	1974	only	-	May	 1	0:00	0	-
-Rule	Arg	1988	only	-	Dec	 1	0:00	1:00	S
+Rule	Arg	1988	only	-	Dec	 1	0:00	1:00	-
 #
 # From Hernan G. Otero (1995-06-26):
 # These corrections were contributed by InterSoft Argentina S.A.,
@@ -99,7 +99,7 @@
 # Talleres de Hidrografía Naval Argentina
 # (Argentine Naval Hydrography Institute)
 Rule	Arg	1989	1993	-	Mar	Sun>=1	0:00	0	-
-Rule	Arg	1989	1992	-	Oct	Sun>=15	0:00	1:00	S
+Rule	Arg	1989	1992	-	Oct	Sun>=15	0:00	1:00	-
 #
 # From Hernan G. Otero (1995-06-26):
 # From this moment on, the law that mandated the daylight saving
@@ -110,7 +110,7 @@
 # On October 3, 1999, 0:00 local, Argentina implemented daylight savings time,
 # which did not result in the switch of a time zone, as they stayed 9 hours
 # from the International Date Line.
-Rule	Arg	1999	only	-	Oct	Sun>=1	0:00	1:00	S
+Rule	Arg	1999	only	-	Oct	Sun>=1	0:00	1:00	-
 # From Paul Eggert (2007-12-28):
 # DST was set to expire on March 5, not March 3, but since it was converted
 # to standard time on March 3 it's more convenient for us to pretend that
@@ -213,9 +213,9 @@
 # la modificación del huso horario, ya que 2009 nos encuentra con
 # crecimiento en la producción y distribución energética."
 
-Rule	Arg	2007	only	-	Dec	30	0:00	1:00	S
+Rule	Arg	2007	only	-	Dec	30	0:00	1:00	-
 Rule	Arg	2008	2009	-	Mar	Sun>=15	0:00	0	-
-Rule	Arg	2008	only	-	Oct	Sun>=15	0:00	1:00	S
+Rule	Arg	2008	only	-	Oct	Sun>=15	0:00	1:00	-
 
 # From Mariano Absatz (2004-05-21):
 # Today it was officially published that the Province of Mendoza is changing
@@ -225,12 +225,14 @@
 # It's Law No. 7,210.  This change is due to a public power emergency, so for
 # now we'll assume it's for this year only.
 #
-# From Paul Eggert (2014-08-09):
+# From Paul Eggert (2018-01-31):
 # Hora de verano para la República Argentina
 # http://buenasiembra.com.ar/esoterismo/astrologia/hora-de-verano-de-la-republica-argentina-27.html
 # says that standard time in Argentina from 1894-10-31
 # to 1920-05-01 was -4:16:48.25.  Go with this more-precise value
-# over Shanks & Pottenger.
+# over Shanks & Pottenger.  It is upward compatible with Milne, who
+# says Córdoba time was -4:16:48.2.
+
 #
 # From Mariano Absatz (2004-06-05):
 # These media articles from a major newspaper mostly cover the current state:
@@ -404,9 +406,9 @@
 # rules...San Luis is still using "Western ARgentina Time" and it got
 # stuck on Summer daylight savings time even though the summer is over.
 
-# From Paul Eggert (2013-09-05):
+# From Paul Eggert (2018-01-23):
 # Perhaps San Luis operates on the legal fiction that it is at -04
-# with perpetual summer time, but ordinary usage typically seems to
+# with perpetual daylight saving time, but ordinary usage typically seems to
 # just say it's at -03; see, for example,
 # https://es.wikipedia.org/wiki/Hora_oficial_argentina
 # We've documented similar situations as being plain changes to
@@ -415,9 +417,6 @@
 # plus is that this silences a zic complaint that there's no POSIX TZ
 # setting for time stamps past 2038.
 
-# From Paul Eggert (2013-02-21):
-# Milne says Córdoba time was -4:16:48.2.  Round to the nearest second.
-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 #
 # Buenos Aires (BA), Capital Federal (CF),
@@ -552,7 +551,7 @@
 # San Luis (SL)
 
 Rule	SanLuis	2008	2009	-	Mar	Sun>=8	0:00	0	-
-Rule	SanLuis	2007	2008	-	Oct	Sun>=8	0:00	1:00	S
+Rule	SanLuis	2007	2008	-	Oct	Sun>=8	0:00	1:00	-
 
 Zone America/Argentina/San_Luis -4:25:24 - LMT	1894 Oct 31
 			-4:16:48 -	CMT	1920 May
@@ -794,14 +793,14 @@
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 # Decree 20,466 <http://pcdsh01.on.br/HV20466.htm> (1931-10-01)
 # Decree 21,896 <http://pcdsh01.on.br/HV21896.htm> (1932-01-10)
-Rule	Brazil	1931	only	-	Oct	 3	11:00	1:00	S
+Rule	Brazil	1931	only	-	Oct	 3	11:00	1:00	-
 Rule	Brazil	1932	1933	-	Apr	 1	 0:00	0	-
-Rule	Brazil	1932	only	-	Oct	 3	 0:00	1:00	S
+Rule	Brazil	1932	only	-	Oct	 3	 0:00	1:00	-
 # Decree 23,195 <http://pcdsh01.on.br/HV23195.htm> (1933-10-10)
 # revoked DST.
 # Decree 27,496 <http://pcdsh01.on.br/HV27496.htm> (1949-11-24)
 # Decree 27,998 <http://pcdsh01.on.br/HV27998.htm> (1950-04-13)
-Rule	Brazil	1949	1952	-	Dec	 1	 0:00	1:00	S
+Rule	Brazil	1949	1952	-	Dec	 1	 0:00	1:00	-
 Rule	Brazil	1950	only	-	Apr	16	 1:00	0	-
 Rule	Brazil	1951	1952	-	Apr	 1	 0:00	0	-
 # Decree 32,308 <http://pcdsh01.on.br/HV32308.htm> (1953-02-24)
@@ -813,51 +812,51 @@
 # in SP, RJ, GB, MG, ES, due to the prolongation of the drought.
 # Decree 53,071 <http://pcdsh01.on.br/HV53071.htm> (1963-12-03)
 # extended the above decree to all of the national territory on 12-09.
-Rule	Brazil	1963	only	-	Dec	 9	 0:00	1:00	S
+Rule	Brazil	1963	only	-	Dec	 9	 0:00	1:00	-
 # Decree 53,604 <http://pcdsh01.on.br/HV53604.htm> (1964-02-25)
 # extended summer time by one day to 1964-03-01 00:00 (start of school).
 Rule	Brazil	1964	only	-	Mar	 1	 0:00	0	-
 # Decree 55,639 <http://pcdsh01.on.br/HV55639.htm> (1965-01-27)
-Rule	Brazil	1965	only	-	Jan	31	 0:00	1:00	S
+Rule	Brazil	1965	only	-	Jan	31	 0:00	1:00	-
 Rule	Brazil	1965	only	-	Mar	31	 0:00	0	-
 # Decree 57,303 <http://pcdsh01.on.br/HV57303.htm> (1965-11-22)
-Rule	Brazil	1965	only	-	Dec	 1	 0:00	1:00	S
+Rule	Brazil	1965	only	-	Dec	 1	 0:00	1:00	-
 # Decree 57,843 <http://pcdsh01.on.br/HV57843.htm> (1966-02-18)
 Rule	Brazil	1966	1968	-	Mar	 1	 0:00	0	-
-Rule	Brazil	1966	1967	-	Nov	 1	 0:00	1:00	S
+Rule	Brazil	1966	1967	-	Nov	 1	 0:00	1:00	-
 # Decree 63,429 <http://pcdsh01.on.br/HV63429.htm> (1968-10-15)
 # revoked DST.
 # Decree 91,698 <http://pcdsh01.on.br/HV91698.htm> (1985-09-27)
-Rule	Brazil	1985	only	-	Nov	 2	 0:00	1:00	S
+Rule	Brazil	1985	only	-	Nov	 2	 0:00	1:00	-
 # Decree 92,310 (1986-01-21)
 # Decree 92,463 (1986-03-13)
 Rule	Brazil	1986	only	-	Mar	15	 0:00	0	-
 # Decree 93,316 (1986-10-01)
-Rule	Brazil	1986	only	-	Oct	25	 0:00	1:00	S
+Rule	Brazil	1986	only	-	Oct	25	 0:00	1:00	-
 Rule	Brazil	1987	only	-	Feb	14	 0:00	0	-
 # Decree 94,922 <http://pcdsh01.on.br/HV94922.htm> (1987-09-22)
-Rule	Brazil	1987	only	-	Oct	25	 0:00	1:00	S
+Rule	Brazil	1987	only	-	Oct	25	 0:00	1:00	-
 Rule	Brazil	1988	only	-	Feb	 7	 0:00	0	-
 # Decree 96,676 <http://pcdsh01.on.br/HV96676.htm> (1988-09-12)
 # except for the states of AC, AM, PA, RR, RO, and AP (then a territory)
-Rule	Brazil	1988	only	-	Oct	16	 0:00	1:00	S
+Rule	Brazil	1988	only	-	Oct	16	 0:00	1:00	-
 Rule	Brazil	1989	only	-	Jan	29	 0:00	0	-
 # Decree 98,077 <http://pcdsh01.on.br/HV98077.htm> (1989-08-21)
 # with the same exceptions
-Rule	Brazil	1989	only	-	Oct	15	 0:00	1:00	S
+Rule	Brazil	1989	only	-	Oct	15	 0:00	1:00	-
 Rule	Brazil	1990	only	-	Feb	11	 0:00	0	-
 # Decree 99,530 <http://pcdsh01.on.br/HV99530.htm> (1990-09-17)
 # adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF.
 # Decree 99,629 (1990-10-19) adds BA, MT.
-Rule	Brazil	1990	only	-	Oct	21	 0:00	1:00	S
+Rule	Brazil	1990	only	-	Oct	21	 0:00	1:00	-
 Rule	Brazil	1991	only	-	Feb	17	 0:00	0	-
 # Unnumbered decree <http://pcdsh01.on.br/HV1991.htm> (1991-09-25)
 # adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF.
-Rule	Brazil	1991	only	-	Oct	20	 0:00	1:00	S
+Rule	Brazil	1991	only	-	Oct	20	 0:00	1:00	-
 Rule	Brazil	1992	only	-	Feb	 9	 0:00	0	-
 # Unnumbered decree <http://pcdsh01.on.br/HV1992.htm> (1992-10-16)
 # adopted by same states.
-Rule	Brazil	1992	only	-	Oct	25	 0:00	1:00	S
+Rule	Brazil	1992	only	-	Oct	25	 0:00	1:00	-
 Rule	Brazil	1993	only	-	Jan	31	 0:00	0	-
 # Decree 942 <http://pcdsh01.on.br/HV942.htm> (1993-09-28)
 # adopted by same states, plus AM.
@@ -867,12 +866,12 @@
 # adopted by same states, plus MT and TO.
 # Decree 1,674 <http://pcdsh01.on.br/HV1674.htm> (1995-10-13)
 # adds AL, SE.
-Rule	Brazil	1993	1995	-	Oct	Sun>=11	 0:00	1:00	S
+Rule	Brazil	1993	1995	-	Oct	Sun>=11	 0:00	1:00	-
 Rule	Brazil	1994	1995	-	Feb	Sun>=15	 0:00	0	-
 Rule	Brazil	1996	only	-	Feb	11	 0:00	0	-
 # Decree 2,000 <http://pcdsh01.on.br/HV2000.htm> (1996-09-04)
 # adopted by same states, minus AL, SE.
-Rule	Brazil	1996	only	-	Oct	 6	 0:00	1:00	S
+Rule	Brazil	1996	only	-	Oct	 6	 0:00	1:00	-
 Rule	Brazil	1997	only	-	Feb	16	 0:00	0	-
 # From Daniel C. Sobral (1998-02-12):
 # In 1997, the DS began on October 6. The stated reason was that
@@ -882,19 +881,19 @@
 # to help dealing with the shortages of electric power.
 #
 # Decree 2,317 (1997-09-04), adopted by same states.
-Rule	Brazil	1997	only	-	Oct	 6	 0:00	1:00	S
+Rule	Brazil	1997	only	-	Oct	 6	 0:00	1:00	-
 # Decree 2,495 <http://pcdsh01.on.br/figuras/HV2495.JPG>
 # (1998-02-10)
 Rule	Brazil	1998	only	-	Mar	 1	 0:00	0	-
 # Decree 2,780 <http://pcdsh01.on.br/figuras/Hv98.jpg> (1998-09-11)
 # adopted by the same states as before.
-Rule	Brazil	1998	only	-	Oct	11	 0:00	1:00	S
+Rule	Brazil	1998	only	-	Oct	11	 0:00	1:00	-
 Rule	Brazil	1999	only	-	Feb	21	 0:00	0	-
 # Decree 3,150 <http://pcdsh01.on.br/figuras/HV3150.gif>
 # (1999-08-23) adopted by same states.
 # Decree 3,188 <http://pcdsh01.on.br/DecHV99.gif> (1999-09-30)
 # adds SE, AL, PB, PE, RN, CE, PI, MA and RR.
-Rule	Brazil	1999	only	-	Oct	 3	 0:00	1:00	S
+Rule	Brazil	1999	only	-	Oct	 3	 0:00	1:00	-
 Rule	Brazil	2000	only	-	Feb	27	 0:00	0	-
 # Decree 3,592 <http://pcdsh01.on.br/DEC3592.htm> (2000-09-06)
 # adopted by the same states as before.
@@ -904,34 +903,34 @@
 # repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00.
 # Decree 3,916 <http://pcdsh01.on.br/figuras/HV3916.gif>
 # (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE.
-Rule	Brazil	2000	2001	-	Oct	Sun>=8	 0:00	1:00	S
+Rule	Brazil	2000	2001	-	Oct	Sun>=8	 0:00	1:00	-
 Rule	Brazil	2001	2006	-	Feb	Sun>=15	 0:00	0	-
 # Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE.
 # 4,399 <http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm>
-Rule	Brazil	2002	only	-	Nov	 3	 0:00	1:00	S
+Rule	Brazil	2002	only	-	Nov	 3	 0:00	1:00	-
 # Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO.
 # 4,844 <http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm>
-Rule	Brazil	2003	only	-	Oct	19	 0:00	1:00	S
+Rule	Brazil	2003	only	-	Oct	19	 0:00	1:00	-
 # Decree 5,223 (2004-10-01) reestablishes DST in MT.
 # 5,223 <http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm>
-Rule	Brazil	2004	only	-	Nov	 2	 0:00	1:00	S
+Rule	Brazil	2004	only	-	Nov	 2	 0:00	1:00	-
 # Decree 5,539 <http://pcdsh01.on.br/DecHV5539.gif> (2005-09-19),
 # adopted by the same states as before.
-Rule	Brazil	2005	only	-	Oct	16	 0:00	1:00	S
+Rule	Brazil	2005	only	-	Oct	16	 0:00	1:00	-
 # Decree 5,920 <http://pcdsh01.on.br/DecHV5920.gif> (2006-10-03),
 # adopted by the same states as before.
-Rule	Brazil	2006	only	-	Nov	 5	 0:00	1:00	S
+Rule	Brazil	2006	only	-	Nov	 5	 0:00	1:00	-
 Rule	Brazil	2007	only	-	Feb	25	 0:00	0	-
 # Decree 6,212 <http://pcdsh01.on.br/DecHV6212.gif> (2007-09-26),
 # adopted by the same states as before.
-Rule	Brazil	2007	only	-	Oct	Sun>=8	 0:00	1:00	S
+Rule	Brazil	2007	only	-	Oct	Sun>=8	 0:00	1:00	-
 # From Frederico A. C. Neves (2008-09-10):
 # According to this decree
 # http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm
 # [t]he DST period in Brazil now on will be from the 3rd Oct Sunday to the
 # 3rd Feb Sunday. There is an exception on the return date when this is
 # the Carnival Sunday then the return date will be the next Sunday...
-Rule	Brazil	2008	2017	-	Oct	Sun>=15	0:00	1:00	S
+Rule	Brazil	2008	2017	-	Oct	Sun>=15	0:00	1:00	-
 Rule	Brazil	2008	2011	-	Feb	Sun>=15	0:00	0	-
 # Decree 7,584 <http://pcdsh01.on.br/HVdecreto7584_20111013.jpg> (2011-10-13)
 # added Bahia.
@@ -949,7 +948,7 @@
 # ... https://www.timeanddate.com/news/time/brazil-delays-dst-2018.html
 # From Steffen Thorsen (2017-12-20):
 # http://www.planalto.gov.br/ccivil_03/_ato2015-2018/2017/decreto/D9242.htm
-Rule	Brazil	2018	max	-	Nov	Sun>=1	0:00	1:00	S
+Rule	Brazil	2018	max	-	Nov	Sun>=1	0:00	1:00	-
 Rule	Brazil	2023	only	-	Feb	Sun>=22	0:00	0	-
 Rule	Brazil	2024	2025	-	Feb	Sun>=15	0:00	0	-
 Rule	Brazil	2026	only	-	Feb	Sun>=22	0:00	0	-
@@ -1256,28 +1255,28 @@
 # For now, assume that they will not revert.
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	Chile	1927	1931	-	Sep	 1	0:00	1:00	S
+Rule	Chile	1927	1931	-	Sep	 1	0:00	1:00	-
 Rule	Chile	1928	1932	-	Apr	 1	0:00	0	-
-Rule	Chile	1968	only	-	Nov	 3	4:00u	1:00	S
+Rule	Chile	1968	only	-	Nov	 3	4:00u	1:00	-
 Rule	Chile	1969	only	-	Mar	30	3:00u	0	-
-Rule	Chile	1969	only	-	Nov	23	4:00u	1:00	S
+Rule	Chile	1969	only	-	Nov	23	4:00u	1:00	-
 Rule	Chile	1970	only	-	Mar	29	3:00u	0	-
 Rule	Chile	1971	only	-	Mar	14	3:00u	0	-
-Rule	Chile	1970	1972	-	Oct	Sun>=9	4:00u	1:00	S
+Rule	Chile	1970	1972	-	Oct	Sun>=9	4:00u	1:00	-
 Rule	Chile	1972	1986	-	Mar	Sun>=9	3:00u	0	-
-Rule	Chile	1973	only	-	Sep	30	4:00u	1:00	S
-Rule	Chile	1974	1987	-	Oct	Sun>=9	4:00u	1:00	S
+Rule	Chile	1973	only	-	Sep	30	4:00u	1:00	-
+Rule	Chile	1974	1987	-	Oct	Sun>=9	4:00u	1:00	-
 Rule	Chile	1987	only	-	Apr	12	3:00u	0	-
 Rule	Chile	1988	1990	-	Mar	Sun>=9	3:00u	0	-
-Rule	Chile	1988	1989	-	Oct	Sun>=9	4:00u	1:00	S
-Rule	Chile	1990	only	-	Sep	16	4:00u	1:00	S
+Rule	Chile	1988	1989	-	Oct	Sun>=9	4:00u	1:00	-
+Rule	Chile	1990	only	-	Sep	16	4:00u	1:00	-
 Rule	Chile	1991	1996	-	Mar	Sun>=9	3:00u	0	-
-Rule	Chile	1991	1997	-	Oct	Sun>=9	4:00u	1:00	S
+Rule	Chile	1991	1997	-	Oct	Sun>=9	4:00u	1:00	-
 Rule	Chile	1997	only	-	Mar	30	3:00u	0	-
 Rule	Chile	1998	only	-	Mar	Sun>=9	3:00u	0	-
-Rule	Chile	1998	only	-	Sep	27	4:00u	1:00	S
+Rule	Chile	1998	only	-	Sep	27	4:00u	1:00	-
 Rule	Chile	1999	only	-	Apr	 4	3:00u	0	-
-Rule	Chile	1999	2010	-	Oct	Sun>=9	4:00u	1:00	S
+Rule	Chile	1999	2010	-	Oct	Sun>=9	4:00u	1:00	-
 Rule	Chile	2000	2007	-	Mar	Sun>=9	3:00u	0	-
 # N.B.: the end of March 29 in Chile is March 30 in Universal time,
 # which is used below in specifying the transition.
@@ -1285,11 +1284,11 @@
 Rule	Chile	2009	only	-	Mar	Sun>=9	3:00u	0	-
 Rule	Chile	2010	only	-	Apr	Sun>=1	3:00u	0	-
 Rule	Chile	2011	only	-	May	Sun>=2	3:00u	0	-
-Rule	Chile	2011	only	-	Aug	Sun>=16	4:00u	1:00	S
+Rule	Chile	2011	only	-	Aug	Sun>=16	4:00u	1:00	-
 Rule	Chile	2012	2014	-	Apr	Sun>=23	3:00u	0	-
-Rule	Chile	2012	2014	-	Sep	Sun>=2	4:00u	1:00	S
+Rule	Chile	2012	2014	-	Sep	Sun>=2	4:00u	1:00	-
 Rule	Chile	2016	max	-	May	Sun>=9	3:00u	0	-
-Rule	Chile	2016	max	-	Aug	Sun>=9	4:00u	1:00	S
+Rule	Chile	2016	max	-	Aug	Sun>=9	4:00u	1:00	-
 # IATA SSIM anomalies: (1992-02) says 1992-03-14;
 # (1996-09) says 1998-03-08.  Ignore these.
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
@@ -1354,7 +1353,7 @@
 # "A variation of fifteen minutes in the public clocks of Bogota is not rare."
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	CO	1992	only	-	May	 3	0:00	1:00	S
+Rule	CO	1992	only	-	May	 3	0:00	1:00	-
 Rule	CO	1993	only	-	Apr	 4	0:00	0	-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	America/Bogota	-4:56:16 -	LMT	1884 Mar 13
@@ -1414,7 +1413,7 @@
 # repeated.  For now, assume transitions were at 00:00 local time country-wide.
 #
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	Ecuador	1992	only	-	Nov	28	0:00	1:00	S
+Rule	Ecuador	1992	only	-	Nov	28	0:00	1:00	-
 Rule	Ecuador	1993	only	-	Feb	 5	0:00	0	-
 #
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
@@ -1504,22 +1503,22 @@
 #   the maintainers of the database to inform them we're adopting
 #   the same policy this year and suggest recommendations for future years.
 #
-# For now we will assume permanent summer time for the Falklands
+# For now we will assume permanent -03 for the Falklands
 # until advised differently (to apply for 2012 and beyond, after the 2011
 # experiment was apparently successful.)
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	Falk	1937	1938	-	Sep	lastSun	0:00	1:00	S
+Rule	Falk	1937	1938	-	Sep	lastSun	0:00	1:00	-
 Rule	Falk	1938	1942	-	Mar	Sun>=19	0:00	0	-
-Rule	Falk	1939	only	-	Oct	1	0:00	1:00	S
-Rule	Falk	1940	1942	-	Sep	lastSun	0:00	1:00	S
+Rule	Falk	1939	only	-	Oct	1	0:00	1:00	-
+Rule	Falk	1940	1942	-	Sep	lastSun	0:00	1:00	-
 Rule	Falk	1943	only	-	Jan	1	0:00	0	-
-Rule	Falk	1983	only	-	Sep	lastSun	0:00	1:00	S
+Rule	Falk	1983	only	-	Sep	lastSun	0:00	1:00	-
 Rule	Falk	1984	1985	-	Apr	lastSun	0:00	0	-
-Rule	Falk	1984	only	-	Sep	16	0:00	1:00	S
-Rule	Falk	1985	2000	-	Sep	Sun>=9	0:00	1:00	S
+Rule	Falk	1984	only	-	Sep	16	0:00	1:00	-
+Rule	Falk	1985	2000	-	Sep	Sun>=9	0:00	1:00	-
 Rule	Falk	1986	2000	-	Apr	Sun>=16	0:00	0	-
 Rule	Falk	2001	2010	-	Apr	Sun>=15	2:00	0	-
-Rule	Falk	2001	2010	-	Sep	Sun>=1	2:00	1:00	S
+Rule	Falk	2001	2010	-	Sep	Sun>=1	2:00	1:00	-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone Atlantic/Stanley	-3:51:24 -	LMT	1890
 			-3:51:24 -	SMT	1912 Mar 12 # Stanley Mean Time
@@ -1554,16 +1553,16 @@
 # adjust their clocks at 0 hour of the given dates.
 #
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	Para	1975	1988	-	Oct	 1	0:00	1:00	S
+Rule	Para	1975	1988	-	Oct	 1	0:00	1:00	-
 Rule	Para	1975	1978	-	Mar	 1	0:00	0	-
 Rule	Para	1979	1991	-	Apr	 1	0:00	0	-
-Rule	Para	1989	only	-	Oct	22	0:00	1:00	S
-Rule	Para	1990	only	-	Oct	 1	0:00	1:00	S
-Rule	Para	1991	only	-	Oct	 6	0:00	1:00	S
+Rule	Para	1989	only	-	Oct	22	0:00	1:00	-
+Rule	Para	1990	only	-	Oct	 1	0:00	1:00	-
+Rule	Para	1991	only	-	Oct	 6	0:00	1:00	-
 Rule	Para	1992	only	-	Mar	 1	0:00	0	-
-Rule	Para	1992	only	-	Oct	 5	0:00	1:00	S
+Rule	Para	1992	only	-	Oct	 5	0:00	1:00	-
 Rule	Para	1993	only	-	Mar	31	0:00	0	-
-Rule	Para	1993	1995	-	Oct	 1	0:00	1:00	S
+Rule	Para	1993	1995	-	Oct	 1	0:00	1:00	-
 Rule	Para	1994	1995	-	Feb	lastSun	0:00	0	-
 Rule	Para	1996	only	-	Mar	 1	0:00	0	-
 # IATA SSIM (2000-02) says 1999-10-10; ignore this for now.
@@ -1581,7 +1580,7 @@
 # year, the time will change on the first Sunday of October; likewise, the
 # clock will be set back on the first Sunday of March.
 #
-Rule	Para	1996	2001	-	Oct	Sun>=1	0:00	1:00	S
+Rule	Para	1996	2001	-	Oct	Sun>=1	0:00	1:00	-
 # IATA SSIM (1997-09) says Mar 1; go with Shanks & Pottenger.
 Rule	Para	1997	only	-	Feb	lastSun	0:00	0	-
 # Shanks & Pottenger say 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but
@@ -1592,7 +1591,7 @@
 # dst method to be from the first Sunday in September to the first Sunday in
 # April.
 Rule	Para	2002	2004	-	Apr	Sun>=1	0:00	0	-
-Rule	Para	2002	2003	-	Sep	Sun>=1	0:00	1:00	S
+Rule	Para	2002	2003	-	Sep	Sun>=1	0:00	1:00	-
 #
 # From Jesper Nørgaard Welen (2005-01-02):
 # There are several sources that claim that Paraguay made
@@ -1601,7 +1600,7 @@
 # Decree 1,867 (2004-03-05)
 # From Carlos Raúl Perasso via Jesper Nørgaard Welen (2006-10-13)
 # http://www.presidencia.gov.py/decretos/D1867.pdf
-Rule	Para	2004	2009	-	Oct	Sun>=15	0:00	1:00	S
+Rule	Para	2004	2009	-	Oct	Sun>=15	0:00	1:00	-
 Rule	Para	2005	2009	-	Mar	Sun>=8	0:00	0	-
 # From Carlos Raúl Perasso (2010-02-18):
 # By decree number 3958 issued yesterday
@@ -1614,7 +1613,7 @@
 # and that on the first Sunday of the month of October, it is to be set
 # forward 60 minutes, in all the territory of the Paraguayan Republic.
 # ...
-Rule	Para	2010	max	-	Oct	Sun>=1	0:00	1:00	S
+Rule	Para	2010	max	-	Oct	Sun>=1	0:00	1:00	-
 Rule	Para	2010	2012	-	Apr	Sun>=8	0:00	0	-
 #
 # From Steffen Thorsen (2013-03-07):
@@ -1647,16 +1646,16 @@
 # Shanks & Pottenger don't have this transition.  Assume 1986 was like 1987.
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	Peru	1938	only	-	Jan	 1	0:00	1:00	S
+Rule	Peru	1938	only	-	Jan	 1	0:00	1:00	-
 Rule	Peru	1938	only	-	Apr	 1	0:00	0	-
-Rule	Peru	1938	1939	-	Sep	lastSun	0:00	1:00	S
+Rule	Peru	1938	1939	-	Sep	lastSun	0:00	1:00	-
 Rule	Peru	1939	1940	-	Mar	Sun>=24	0:00	0	-
-Rule	Peru	1986	1987	-	Jan	 1	0:00	1:00	S
+Rule	Peru	1986	1987	-	Jan	 1	0:00	1:00	-
 Rule	Peru	1986	1987	-	Apr	 1	0:00	0	-
-Rule	Peru	1990	only	-	Jan	 1	0:00	1:00	S
+Rule	Peru	1990	only	-	Jan	 1	0:00	1:00	-
 Rule	Peru	1990	only	-	Apr	 1	0:00	0	-
 # IATA is ambiguous for 1993/1995; go with Shanks & Pottenger.
-Rule	Peru	1994	only	-	Jan	 1	0:00	1:00	S
+Rule	Peru	1994	only	-	Jan	 1	0:00	1:00	-
 Rule	Peru	1994	only	-	Apr	 1	0:00	0	-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	America/Lima	-5:08:12 -	LMT	1890
@@ -1702,72 +1701,201 @@
 # Uruguay
 # From Paul Eggert (1993-11-18):
 # Uruguay wins the prize for the strangest peacetime manipulation of the rules.
-# From Shanks & Pottenger:
+#
+# From Tim Parenti (2018-02-20), per Jeremie Bonjour (2018-01-31) and Michael
+# Deckers (2018-02-20):
+# ... At least they kept good records...
+#
+# http://www.armada.mil.uy/ContenidosPDFs/sohma/web/almanaque/almanaque_2018.pdf#page=36
+# Page 36 of Almanaque 2018, published by the Oceanography, Hydrography, and
+# Meteorology Service of the Uruguayan Navy, seems to give many transitions
+# with greater clarity than we've had before.  It directly references many laws
+# and decrees which are, in turn, referenced below.  They can be viewed in the
+# public archives of the Diario Oficial (in Spanish) at
+# http://www.impo.com.uy/diariooficial/
+#
+# Ley No. 3920 of 1908-06-10 placed the determination of legal time under the
+# auspices of the National Institute for the Prediction of Time.  It is unclear
+# exactly what offset was used during this period, though Ley No. 7200 of
+# 1920-04-23 used the Observatory of the National Meteorological Institute in
+# Montevideo (34° 54' 33" S, 56° 12' 45" W) as its reference meridian,
+# retarding legal time by 15 minutes 9 seconds from 1920-04-30 24:00,
+# resulting in UT-04.  Assume the corresponding LMT of UT-03:44:51 (given on
+# page 725 of the Proceedings of the Second Pan-American Scientific Congress,
+# 1915-1916) was in use, and merely became official from 1908-06-10.
+# https://www.impo.com.uy/diariooficial/1908/06/18/12
+# https://www.impo.com.uy/diariooficial/1920/04/27/9
+#
+# Ley No. 7594 of 1923-06-28 specified legal time as Observatory time advanced
+# by 44 minutes 51 seconds (UT-03) "from 30 September to 31 March", and by 14
+# minutes 51 seconds (UT-03:30) "the rest of the year"; a message from the
+# National Council of Administration the same day, published directly below the
+# law in the Diario Oficial, specified the first transition to be 1923-09-30
+# 24:00.  This effectively established standard time at UT-03:30 with 30
+# minutes DST.  Assume transitions at 24:00 on the specified days until Ley No.
+# 7919 of 1926-03-05 ended this arrangement, repealing all "laws and other
+# provisions which oppose" it, resulting in year-round UT-03:30; a Resolución
+# of 1926-03-11 puts the final transition at 1926-03-31 24:00, the same as it
+# would have been under the previous law.
+# https://www.impo.com.uy/diariooficial/1923/07/02/2
+# https://www.impo.com.uy/diariooficial/1926/03/10/2
+# https://www.impo.com.uy/diariooficial/1926/03/18/2
+#
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-# Whitman gives 1923 Oct 1; go with Shanks & Pottenger.
-Rule	Uruguay	1923	only	-	Oct	 2	 0:00	0:30	HS
+Rule	Uruguay	1923	1925	-	Oct	 1	 0:00	0:30	-
 Rule	Uruguay	1924	1926	-	Apr	 1	 0:00	0	-
-Rule	Uruguay	1924	1925	-	Oct	 1	 0:00	0:30	HS
-Rule	Uruguay	1933	1935	-	Oct	lastSun	 0:00	0:30	HS
-# Shanks & Pottenger give 1935 Apr 1 0:00 & 1936 Mar 30 0:00; go with Whitman.
-Rule	Uruguay	1934	1936	-	Mar	Sat>=25	23:30s	0	-
-Rule	Uruguay	1936	only	-	Nov	 1	 0:00	0:30	HS
-Rule	Uruguay	1937	1941	-	Mar	lastSun	 0:00	0	-
-# Whitman gives 1937 Oct 3; go with Shanks & Pottenger.
-Rule	Uruguay	1937	1940	-	Oct	lastSun	 0:00	0:30	HS
-# Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13,
-# and 1943 Apr 13 "to present time"; go with Shanks & Pottenger.
-Rule	Uruguay	1941	only	-	Aug	 1	 0:00	0:30	HS
-Rule	Uruguay	1942	only	-	Jan	 1	 0:00	0	-
-Rule	Uruguay	1942	only	-	Dec	14	 0:00	1:00	S
+# From Tim Parenti (2018-02-15):
+# http://www.impo.com.uy/diariooficial/1933/10/27/6
+#
+# It appears Ley No. 9122 of 1933 was never published as such in the Diario
+# Oficial, but instead appeared as Document 26 in the Diario on Friday
+# 1933-10-27 as a decree made Monday 1933-10-23 and filed under the Ministry of
+# National Defense.  It reinstituted a DST of 30 minutes (to UT-03) "from the
+# last Sunday of October...until the last Saturday of March."  In accordance
+# with this provision, the first transition was explicitly specified in Article
+# 2 of the decree as Saturday 1933-10-28 at 24:00; that is, Sunday 1933-10-29
+# at 00:00.  Assume transitions at 00:00 Sunday throughout.
+#
+# Departing from the matter-of-fact nature of previous timekeeping laws, the
+# 1933 decree "consider[s] the advantages of...the advance of legal time":
+#
+#   "Whereas: The measure adopted by almost all nations at the time of the last
+#    World War still persists in North America and Europe, precisely because of
+#    the economic, hygienic, and social advantages derived from such an
+#    emergency measure...
+#
+#    Whereas: The advance of the legal time during the summer seasons, by
+#    displacing social activity near sunrise, favors the citizen populations
+#    and especially the society that creates and works..."
+#
+# It further specified that "necessary measures" be taken to ensure that
+# "public spectacles finish, in general, before [01:00]."
+Rule	Uruguay	1933	1938	-	Oct	lastSun	 0:00	0:30	-
+Rule	Uruguay	1934	1941	-	Mar	lastSat	24:00	0	-
+# From Tim Parenti (2018-02-15):
+# Most of the Rules below, and their contemporaneous Zone lines, have been
+# updated simply to match the Almanaque 2018.  Although the document does not
+# list exact transition times, midnight transitions were already present in our
+# data here for all transitions through 2004-09, and this is both consistent
+# with prior transitions and verified in several decrees marked below between
+# 1939-09 and 2004-09, wherein the relevant text was typically of the form:
+#
+#   "From 0 hours on [date], the legal time of the entire Republic will be...
+#
+#    In accordance with [the preceding], on [previous date] at 24 hours, all
+#    clocks throughout the Republic will be [advanced/retarded] by..."
+#
+# It is possible that there is greater specificity to be found for the Rules
+# below, but it is buried in no fewer than 40 different decrees individually
+# referenced by the Almanaque for the period from 1939-09 to 2014-09.
+# Four-fifths of these were promulgated less than two weeks before taking
+# effect; more than half within a week and none more than 5 weeks.  Only the
+# handful with comments below have been checked with any thoroughness.
+Rule	Uruguay	1939	only	-	Oct	 1	 0:00	0:30	-
+Rule	Uruguay	1940	only	-	Oct	27	 0:00	0:30	-
+# From Tim Parenti (2018-02-15):
+# Decreto 1145 of the Ministry of National Defense, dated 1941-07-26, specified
+# UT-03 from Friday 1941-08-01 00:00, citing an "urgent...need to save fuel".
+# http://www.impo.com.uy/diariooficial/1941/08/04/1
+Rule	Uruguay	1941	only	-	Aug	 1	 0:00	0:30	-
+# From Tim Parenti (2018-02-15):
+# Decreto 1866 of the Ministry of National Defense, dated 1942-12-09, specified
+# further advancement (to UT-02:30) from Sunday 1942-12-13 24:00.  Since clocks
+# never went back to UT-03:30 thereafter, this is modeled as advancing standard
+# time by 30 minutes to UT-03, while retaining 30 minutes of DST.
+# http://www.impo.com.uy/diariooficial/1942/12/16/3
+Rule	Uruguay	1942	only	-	Dec	14	 0:00	0:30	-
 Rule	Uruguay	1943	only	-	Mar	14	 0:00	0	-
-Rule	Uruguay	1959	only	-	May	24	 0:00	1:00	S
+Rule	Uruguay	1959	only	-	May	24	 0:00	0:30	-
 Rule	Uruguay	1959	only	-	Nov	15	 0:00	0	-
-Rule	Uruguay	1960	only	-	Jan	17	 0:00	1:00	S
+Rule	Uruguay	1960	only	-	Jan	17	 0:00	1:00	-
 Rule	Uruguay	1960	only	-	Mar	 6	 0:00	0	-
-Rule	Uruguay	1965	1967	-	Apr	Sun>=1	 0:00	1:00	S
+Rule	Uruguay	1965	only	-	Apr	 4	 0:00	1:00	-
 Rule	Uruguay	1965	only	-	Sep	26	 0:00	0	-
-Rule	Uruguay	1966	1967	-	Oct	31	 0:00	0	-
-Rule	Uruguay	1968	1970	-	May	27	 0:00	0:30	HS
-Rule	Uruguay	1968	1970	-	Dec	 2	 0:00	0	-
-Rule	Uruguay	1972	only	-	Apr	24	 0:00	1:00	S
-Rule	Uruguay	1972	only	-	Aug	15	 0:00	0	-
-Rule	Uruguay	1974	only	-	Mar	10	 0:00	0:30	HS
-Rule	Uruguay	1974	only	-	Dec	22	 0:00	1:00	S
-Rule	Uruguay	1976	only	-	Oct	 1	 0:00	0	-
-Rule	Uruguay	1977	only	-	Dec	 4	 0:00	1:00	S
-Rule	Uruguay	1978	only	-	Apr	 1	 0:00	0	-
-Rule	Uruguay	1979	only	-	Oct	 1	 0:00	1:00	S
-Rule	Uruguay	1980	only	-	May	 1	 0:00	0	-
-Rule	Uruguay	1987	only	-	Dec	14	 0:00	1:00	S
-Rule	Uruguay	1988	only	-	Mar	14	 0:00	0	-
-Rule	Uruguay	1988	only	-	Dec	11	 0:00	1:00	S
-Rule	Uruguay	1989	only	-	Mar	12	 0:00	0	-
-Rule	Uruguay	1989	only	-	Oct	29	 0:00	1:00	S
-# Shanks & Pottenger say no DST was observed in 1990/1 and 1991/2,
-# and that 1992/3's DST was from 10-25 to 03-01.  Go with IATA.
-Rule	Uruguay	1990	1992	-	Mar	Sun>=1	 0:00	0	-
-Rule	Uruguay	1990	1991	-	Oct	Sun>=21	 0:00	1:00	S
-Rule	Uruguay	1992	only	-	Oct	18	 0:00	1:00	S
+# From Tim Parenti (2018-02-15):
+# Decreto 321/968 of 1968-05-25, citing emergency drought measures decreed the
+# day before, brought clocks forward 30 minutes from Monday 1968-05-27 00:00.
+# http://www.impo.com.uy/diariooficial/1968/05/30/5
+Rule	Uruguay	1968	only	-	May	27	 0:00	0:30	-
+Rule	Uruguay	1968	only	-	Dec	 1	 0:00	0	-
+# From Tim Parenti (2018-02-15):
+# Decreto 188/970 of 1970-04-23 instituted restrictions on electricity
+# consumption "as a consequence of the current rainfall regime in the country".
+# Articles 13 and 14 advanced clocks by an hour from Saturday 1970-04-25 00:00.
+# http://www.impo.com.uy/diariooficial/1970/04/29/4
+Rule	Uruguay	1970	only	-	Apr	25	 0:00	1:00	-
+Rule	Uruguay	1970	only	-	Jun	14	 0:00	0	-
+Rule	Uruguay	1972	only	-	Apr	23	 0:00	1:00	-
+Rule	Uruguay	1972	only	-	Jul	16	 0:00	0	-
+# From Tim Parenti (2018-02-15):
+# Decreto 29/974 of 1974-01-11, citing "the international rise in the price of
+# oil", advanced clocks by 90 minutes (to UT-01:30).  Decreto 163/974 of
+# 1974-03-04 returned 60 of those minutes (to UT-02:30), and the remaining 30
+# minutes followed in Decreto 679/974 of 1974-08-29.
+# http://www.impo.com.uy/diariooficial/1974/01/22/11
+# http://www.impo.com.uy/diariooficial/1974/03/14/3
+# http://www.impo.com.uy/diariooficial/1974/09/04/6
+Rule	Uruguay	1974	only	-	Jan	13	 0:00	1:30	-
+Rule	Uruguay	1974	only	-	Mar	10	 0:00	0:30	-
+Rule	Uruguay	1974	only	-	Sep	 1	 0:00	0	-
+Rule	Uruguay	1974	only	-	Dec	22	 0:00	1:00	-
+Rule	Uruguay	1975	only	-	Mar	30	 0:00	0	-
+Rule	Uruguay	1976	only	-	Dec	19	 0:00	1:00	-
+Rule	Uruguay	1977	only	-	Mar	 6	 0:00	0	-
+Rule	Uruguay	1977	only	-	Dec	 4	 0:00	1:00	-
+Rule	Uruguay	1978	1979	-	Mar	Sun>=1	 0:00	0	-
+Rule	Uruguay	1978	only	-	Dec	17	 0:00	1:00	-
+Rule	Uruguay	1979	only	-	Apr	29	 0:00	1:00	-
+Rule	Uruguay	1980	only	-	Mar	16	 0:00	0	-
+# From Tim Parenti (2018-02-15):
+# Decreto 725/987 of 1987-12-04 cited "better use of national tourist
+# attractions" to advance clocks one hour from Monday 1987-12-14 00:00.
+# http://www.impo.com.uy/diariooficial/1988/01/25/1
+Rule	Uruguay	1987	only	-	Dec	14	 0:00	1:00	-
+Rule	Uruguay	1988	only	-	Feb	28	 0:00	0	-
+Rule	Uruguay	1988	only	-	Dec	11	 0:00	1:00	-
+Rule	Uruguay	1989	only	-	Mar	 5	 0:00	0	-
+Rule	Uruguay	1989	only	-	Oct	29	 0:00	1:00	-
+Rule	Uruguay	1990	only	-	Feb	25	 0:00	0	-
+# From Tim Parenti (2018-02-15), per Paul Eggert (1999-11-04):
+# IATA agrees as below for 1990-10 through 1993-02.  Per Almanaque 2018, the
+# 1992/1993 season appears to be the first in over half a century where DST
+# both began and ended pursuant to the same decree.
+Rule	Uruguay	1990	1991	-	Oct	Sun>=21	 0:00	1:00	-
+Rule	Uruguay	1991	1992	-	Mar	Sun>=1	 0:00	0	-
+Rule	Uruguay	1992	only	-	Oct	18	 0:00	1:00	-
 Rule	Uruguay	1993	only	-	Feb	28	 0:00	0	-
 # From Eduardo Cota (2004-09-20):
 # The Uruguayan government has decreed a change in the local time....
-# http://www.presidencia.gub.uy/decretos/2004091502.htm
-Rule	Uruguay	2004	only	-	Sep	19	 0:00	1:00	S
+# From Tim Parenti (2018-02-15):
+# Decreto 328/004 of 2004-09-15.
+# http://www.impo.com.uy/diariooficial/2004/09/23/documentos.pdf#page=1
+Rule	Uruguay	2004	only	-	Sep	19	 0:00	1:00	-
 # From Steffen Thorsen (2005-03-11):
 # Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to
 # save energy ... it was postponed two weeks....
-# http://www.presidencia.gub.uy/_Web/noticias/2005/03/2005031005.htm
+# From Tim Parenti (2018-02-15):
+# This 2005 postponement is not in Almanaque 2018.  Go with the contemporaneous
+# reporting, which is confirmed by Decreto 107/005 of 2005-03-10 amending
+# Decreto 328/004:
+# http://www.impo.com.uy/diariooficial/2005/03/15/documentos.pdf#page=1
+# The original decree specified a transition of 2005-03-12 24:00, but the new
+# one specified 2005-03-27 02:00.
 Rule	Uruguay	2005	only	-	Mar	27	 2:00	0	-
 # From Eduardo Cota (2005-09-27):
-# http://www.presidencia.gub.uy/_Web/decretos/2005/09/CM%20119_09%2009%202005_00001.PDF
-# This means that from 2005-10-09 at 02:00 local time, until 2006-03-12 at
-# 02:00 local time, official time in Uruguay will be at GMT -2.
-Rule	Uruguay	2005	only	-	Oct	 9	 2:00	1:00	S
-Rule	Uruguay	2006	only	-	Mar	12	 2:00	0	-
-# From Jesper Nørgaard Welen (2006-09-06):
-# http://www.presidencia.gub.uy/_web/decretos/2006/09/CM%20210_08%2006%202006_00001.PDF
-#
+# ...from 2005-10-09 at 02:00 local time, until 2006-03-12 at 02:00 local time,
+# official time in Uruguay will be at GMT -2.
+# From Tim Parenti (2018-02-15):
+# Decreto 318/005 of 2005-09-19.
+# http://www.impo.com.uy/diariooficial/2005/09/23/documentos.pdf#page=1
+Rule	Uruguay	2005	only	-	Oct	 9	 2:00	1:00	-
+Rule	Uruguay	2006	2015	-	Mar	Sun>=8	 2:00	0	-
+# From Tim Parenti (2018-02-15), per Jesper Nørgaard Welen (2006-09-06):
+# Decreto 311/006 of 2006-09-04 established regular DST from the first Sunday
+# of October at 02:00 through the second Sunday of March at 02:00.  Almanaque
+# 2018 appears to have a few typoed dates through this period; ignore them.
+# http://www.impo.com.uy/diariooficial/2006/09/08/documentos.pdf#page=1
+Rule	Uruguay	2006	2014	-	Oct	Sun>=1	 2:00	1:00	-
 # From Steffen Thorsen (2015-06-30):
 # ... it looks like they will not be using DST the coming summer:
 # http://www.elobservador.com.uy/gobierno-resolvio-que-no-habra-cambio-horario-verano-n656787
@@ -1777,17 +1905,19 @@
 # instead of out to dinner.
 # From Pablo Camargo (2015-07-13):
 # http://archivo.presidencia.gub.uy/sci/decretos/2015/06/cons_min_201.pdf
-# [dated 2015-06-29; repeals Decree 311/006 dated 2006-09-04]
-Rule	Uruguay	2006	2014	-	Oct	Sun>=1	 2:00	1:00	S
-Rule	Uruguay	2007	2015	-	Mar	Sun>=8	 2:00	0	-
+# From Tim Parenti (2018-02-15):
+# Decreto 178/015 of 2015-06-29; repeals Decreto 311/006.
 
 # This Zone can be simplified once we assume zic %z.
-Zone America/Montevideo	-3:44:44 -	LMT	1898 Jun 28
-			-3:44:44 -	MMT	1920 May  1 # Montevideo MT
+Zone America/Montevideo	-3:44:51 -	LMT	1908 Jun 10
+			-3:44:51 -	MMT	1920 May  1 # Montevideo MT
+			-4:00	-	-04	1923 Oct  1
 			-3:30	Uruguay	-0330/-03 1942 Dec 14
+			-3:00	Uruguay	-03/-0230 1960
 			-3:00	Uruguay	-03/-02	1968
-			-3:00	Uruguay	-03/-0230 1971
+			-3:00	Uruguay	-03/-0230 1970
 			-3:00	Uruguay	-03/-02	1974
+			-3:00	Uruguay	-03/-0130 1974 Mar 10
 			-3:00	Uruguay	-03/-0230 1974 Dec 22
 			-3:00	Uruguay	-03/-02
 
--- a/make/data/tzdata/zone.tab	Mon Apr 09 13:35:19 2018 +0200
+++ b/make/data/tzdata/zone.tab	Mon Apr 09 04:43:03 2018 -0700
@@ -452,7 +452,7 @@
 US	+643004-1652423	America/Nome	Alaska (west)
 US	+515248-1763929	America/Adak	Aleutian Islands
 US	+211825-1575130	Pacific/Honolulu	Hawaii
-UY	-3453-05611	America/Montevideo
+UY	-345433-0561245	America/Montevideo
 UZ	+3940+06648	Asia/Samarkand	Uzbekistan (west)
 UZ	+4120+06918	Asia/Tashkent	Uzbekistan (east)
 VA	+415408+0122711	Europe/Vatican
--- a/src/java.base/share/classes/sun/util/resources/TimeZoneNames.java	Mon Apr 09 13:35:19 2018 +0200
+++ b/src/java.base/share/classes/sun/util/resources/TimeZoneNames.java	Mon Apr 09 04:43:03 2018 -0700
@@ -445,7 +445,7 @@
                                               "Western Greenland Summer Time", "WGST",
                                               "Western Greenland Time", "WGT"}},
             {"America/Goose_Bay", AST},
-            {"America/Grand_Turk", AST},
+            {"America/Grand_Turk", EST},
             {"America/Grenada", AST},
             {"America/Guadeloupe", AST},
             {"America/Guatemala", CST},
--- a/src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_de.java	Mon Apr 09 13:35:19 2018 +0200
+++ b/src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_de.java	Mon Apr 09 04:43:03 2018 -0700
@@ -446,7 +446,7 @@
                                               "Westgr\u00f6nl\u00e4ndische Sommerzeit", "WGST",
                                               "Westgr\u00F6nl\u00E4ndische Zeit", "WGT"}},
             {"America/Goose_Bay", AST},
-            {"America/Grand_Turk", AST},
+            {"America/Grand_Turk", EST},
             {"America/Grenada", AST},
             {"America/Guadeloupe", AST},
             {"America/Guatemala", CST},
--- a/src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_es.java	Mon Apr 09 13:35:19 2018 +0200
+++ b/src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_es.java	Mon Apr 09 04:43:03 2018 -0700
@@ -446,7 +446,7 @@
                                               "Hora de verano de Groenlandia Occidental", "WGST",
                                               "Hora de Groenlandia Occidental", "WGT"}},
             {"America/Goose_Bay", AST},
-            {"America/Grand_Turk", AST},
+            {"America/Grand_Turk", EST},
             {"America/Grenada", AST},
             {"America/Guadeloupe", AST},
             {"America/Guatemala", CST},
--- a/src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_fr.java	Mon Apr 09 13:35:19 2018 +0200
+++ b/src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_fr.java	Mon Apr 09 04:43:03 2018 -0700
@@ -446,7 +446,7 @@
                                               "Heure d'\u00e9t\u00e9 du Groenland de l'Ouest", "WGST",
                                               "Heure du Groenland de l'Ouest", "WGT"}},
             {"America/Goose_Bay", AST},
-            {"America/Grand_Turk", AST},
+            {"America/Grand_Turk", EST},
             {"America/Grenada", AST},
             {"America/Guadeloupe", AST},
             {"America/Guatemala", CST},
--- a/src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_it.java	Mon Apr 09 13:35:19 2018 +0200
+++ b/src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_it.java	Mon Apr 09 04:43:03 2018 -0700
@@ -446,7 +446,7 @@
                                               "Ora estiva della Groenlandia occidentale", "WGST",
                                               "Ora della Groenlandia occidentale", "WGT"}},
             {"America/Goose_Bay", AST},
-            {"America/Grand_Turk", AST},
+            {"America/Grand_Turk", EST},
             {"America/Grenada", AST},
             {"America/Guadeloupe", AST},
             {"America/Guatemala", CST},
--- a/src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_ja.java	Mon Apr 09 13:35:19 2018 +0200
+++ b/src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_ja.java	Mon Apr 09 04:43:03 2018 -0700
@@ -446,7 +446,7 @@
                                               "\u897f\u30b0\u30ea\u30fc\u30f3\u30e9\u30f3\u30c9\u590f\u6642\u9593", "WGST",
                                               "\u897F\u90E8\u30B0\u30EA\u30FC\u30F3\u30E9\u30F3\u30C9\u6642\u9593", "WGT"}},
             {"America/Goose_Bay", AST},
-            {"America/Grand_Turk", AST},
+            {"America/Grand_Turk", EST},
             {"America/Grenada", AST},
             {"America/Guadeloupe", AST},
             {"America/Guatemala", CST},
--- a/src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_ko.java	Mon Apr 09 13:35:19 2018 +0200
+++ b/src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_ko.java	Mon Apr 09 04:43:03 2018 -0700
@@ -446,7 +446,7 @@
                                               "\uc11c\ubd80 \uadf8\ub9b0\ub79c\ub4dc \uc77c\uad11\uc808\uc57d\uc2dc\uac04", "WGST",
                                               "\uC11C\uBD80 \uADF8\uB9B0\uB780\uB4DC \uD45C\uC900\uC2DC", "WGT"}},
             {"America/Goose_Bay", AST},
-            {"America/Grand_Turk", AST},
+            {"America/Grand_Turk", EST},
             {"America/Grenada", AST},
             {"America/Guadeloupe", AST},
             {"America/Guatemala", CST},
--- a/src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_pt_BR.java	Mon Apr 09 13:35:19 2018 +0200
+++ b/src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_pt_BR.java	Mon Apr 09 04:43:03 2018 -0700
@@ -446,7 +446,7 @@
                                               "Fuso hor\u00e1rio de ver\u00e3o da Groenl\u00e2ndia Ocidental", "WGST",
                                               "Hor\u00E1rio da Groenl\u00E2ndia Ocidental", "WGT"}},
             {"America/Goose_Bay", AST},
-            {"America/Grand_Turk", AST},
+            {"America/Grand_Turk", EST},
             {"America/Grenada", AST},
             {"America/Guadeloupe", AST},
             {"America/Guatemala", CST},
--- a/src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_sv.java	Mon Apr 09 13:35:19 2018 +0200
+++ b/src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_sv.java	Mon Apr 09 04:43:03 2018 -0700
@@ -446,7 +446,7 @@
                                               "V\u00e4stra Gr\u00f6nland, sommartid", "WGST",
                                               "V\u00E4stgr\u00F6nl\u00E4ndsk tid", "WGT"}},
             {"America/Goose_Bay", AST},
-            {"America/Grand_Turk", AST},
+            {"America/Grand_Turk", EST},
             {"America/Grenada", AST},
             {"America/Guadeloupe", AST},
             {"America/Guatemala", CST},
--- a/src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_zh_CN.java	Mon Apr 09 13:35:19 2018 +0200
+++ b/src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_zh_CN.java	Mon Apr 09 04:43:03 2018 -0700
@@ -446,7 +446,7 @@
                                               "\u897f\u683c\u6797\u5170\u5c9b\u590f\u4ee4\u65f6", "WGST",
                                               "\u897F\u683C\u6797\u5170\u5C9B\u65F6\u95F4", "WGT"}},
             {"America/Goose_Bay", AST},
-            {"America/Grand_Turk", AST},
+            {"America/Grand_Turk", EST},
             {"America/Grenada", AST},
             {"America/Guadeloupe", AST},
             {"America/Guatemala", CST},
--- a/src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_zh_TW.java	Mon Apr 09 13:35:19 2018 +0200
+++ b/src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_zh_TW.java	Mon Apr 09 04:43:03 2018 -0700
@@ -446,7 +446,7 @@
                                               "\u897f\u683c\u6797\u862d\u5cf6\u590f\u4ee4\u6642\u9593", "WGST",
                                               "\u897F\u683C\u9675\u862D\u6642\u9593", "WGT"}},
             {"America/Goose_Bay", AST},
-            {"America/Grand_Turk", AST},
+            {"America/Grand_Turk", EST},
             {"America/Grenada", AST},
             {"America/Guadeloupe", AST},
             {"America/Guatemala", CST},
--- a/test/jdk/sun/util/calendar/zi/tzdata/VERSION	Mon Apr 09 13:35:19 2018 +0200
+++ b/test/jdk/sun/util/calendar/zi/tzdata/VERSION	Mon Apr 09 04:43:03 2018 -0700
@@ -21,4 +21,4 @@
 # or visit www.oracle.com if you need additional information or have any
 # questions.
 #
-tzdata2018c
+tzdata2018d
--- a/test/jdk/sun/util/calendar/zi/tzdata/africa	Mon Apr 09 13:35:19 2018 +0200
+++ b/test/jdk/sun/util/calendar/zi/tzdata/africa	Mon Apr 09 04:43:03 2018 -0700
@@ -138,13 +138,13 @@
 
 # Cape Verde / Cabo Verde
 #
+# From Paul Eggert (2018-02-16):
 # Shanks gives 1907 for the transition to +02.
-# Perhaps the 1911-05-26 Portuguese decree
-# https://dre.pt/pdf1sdip/1911/05/12500/23132313.pdf
-# merely made it official?
+# For now, ignore that and follow the 1911-05-26 Portuguese decree
+# (see Europe/Lisbon).
 #
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
-Zone Atlantic/Cape_Verde -1:34:04 -	LMT	1907        # Praia
+Zone Atlantic/Cape_Verde -1:34:04 -	LMT	1912 Jan 01  2:00u # Praia
 			-2:00	-	-02	1942 Sep
 			-2:00	1:00	-01	1945 Oct 15
 			-2:00	-	-02	1975 Nov 25  2:00
@@ -393,15 +393,34 @@
 # See Africa/Abidjan.
 
 # Ghana
+
+# From Paul Eggert (2018-01-30):
+# Whitman says DST was observed from 1931 to "the present";
+# Shanks & Pottenger say 1936 to 1942 with 20 minutes of DST,
+# with transitions on 09-01 and 12-31 at 00:00.
+# Page 33 of Parish GCB, Colonial Reports - Annual. No. 1066. Gold
+# Coast. Report for 1919. (March 1921), OCLC 784024077
+# http://libsysdigi.library.illinois.edu/ilharvest/africana/books2011-05/5530214/5530214_1919/5530214_1919_opt.pdf
+# lists the Determination of the Time Ordinance, 1919, No. 18,
+# "to advance the time observed locally by the space of twenty minutes
+# during the last four months of each year; the object in view being
+# to extend during those months the period of daylight-time available
+# for evening recreation after office hours."
+# Vanessa Ogle, The Global Transformation of Time, 1870-1950 (2015), p 33,
+# writes "In 1919, the Gold Coast (Ghana as of 1957) made Greenwich
+# time its legal time and simultaneously legalized a summer time of
+# UTC - 00:20 minutes from March to October."; a footnote lists
+# the ordinance as being dated 1919-11-24.
+# The Crown Colonist, Volume 12 (1942), p 176, says "the Government
+# intend advancing Gold Coast time half an hour ahead of G.M.T.
+# The actual date of the alteration has not yet been announced."
+# These sources are incomplete and contradictory.  Possibly what is
+# now Ghana observed different DST regimes in different years.  For
+# lack of better info, use Shanks except treat the minus sign as a
+# typo, and assume DST started in 1920 not 1936.
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-# Whitman says DST was observed from 1931 to "the present";
-# Shanks & Pottenger say 1936 to 1942;
-# and September 1 to January 1 is given by:
-# Scott Keltie J, Epstein M (eds), The Statesman's Year-Book,
-# 57th ed. Macmillan, London (1920), OCLC 609408015, pp xxviii.
-# For lack of better info, assume DST was observed from 1920 to 1942.
-Rule	Ghana	1920	1942	-	Sep	 1	0:00	0:20	GHST
-Rule	Ghana	1920	1942	-	Dec	31	0:00	0	GMT
+Rule	Ghana	1920	1942	-	Sep	 1	0:00	0:20	-
+Rule	Ghana	1920	1942	-	Dec	31	0:00	0	-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Africa/Accra	-0:00:52 -	LMT	1918
 			 0:00	Ghana	GMT/+0020
@@ -411,13 +430,13 @@
 
 # Guinea-Bissau
 #
+# From Paul Eggert (2018-02-16):
 # Shanks gives 1911-05-26 for the transition to WAT,
 # evidently confusing the date of the Portuguese decree
-# https://dre.pt/pdf1sdip/1911/05/12500/23132313.pdf
-# with the date that it took effect, namely 1912-01-01.
+# (see Europe/Lisbon) with the date that it took effect.
 #
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
-Zone	Africa/Bissau	-1:02:20 -	LMT	1912 Jan  1
+Zone	Africa/Bissau	-1:02:20 -	LMT	1912 Jan  1  1:00u
 			-1:00	-	-01	1975
 			 0:00	-	GMT
 
@@ -613,9 +632,9 @@
 # at 2am (or 02:00) local time..."
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule Mauritius	1982	only	-	Oct	10	0:00	1:00	S
+Rule Mauritius	1982	only	-	Oct	10	0:00	1:00	-
 Rule Mauritius	1983	only	-	Mar	21	0:00	0	-
-Rule Mauritius	2008	only	-	Oct	lastSun	2:00	1:00	S
+Rule Mauritius	2008	only	-	Oct	lastSun	2:00	1:00	-
 Rule Mauritius	2009	only	-	Mar	lastSun	2:00	0	-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone Indian/Mauritius	3:50:00 -	LMT	1907 # Port Louis
@@ -1060,6 +1079,8 @@
 
 # São Tomé and Príncipe
 
+# See Europe/Lisbon for info about the 1912 transition.
+
 # From Steffen Thorsen (2018-01-08):
 # Multiple sources tell that São Tomé changed from UTC to UTC+1 as
 # they entered the year 2018.
@@ -1068,7 +1089,7 @@
 # http://www.mnec.gov.st/index.php/publicacoes/documentos/file/90-decreto-lei-n-25-2017
 
 Zone	Africa/Sao_Tome	 0:26:56 -	LMT	1884
-			-0:36:45 -	LMT	1912 # Lisbon Mean Time
+			-0:36:45 -	LMT	1912 Jan  1 00:00u # Lisbon MT
 			 0:00	-	GMT	2018 Jan  1 01:00
 			 1:00	-	WAT
 
--- a/test/jdk/sun/util/calendar/zi/tzdata/antarctica	Mon Apr 09 13:35:19 2018 +0200
+++ b/test/jdk/sun/util/calendar/zi/tzdata/antarctica	Mon Apr 09 04:43:03 2018 -0700
@@ -98,7 +98,8 @@
 			8:00	-	+08	2011 Oct 28  2:00
 			11:00	-	+11	2012 Feb 21 17:00u
 			8:00	-	+08	2016 Oct 22
-			11:00	-	+11
+			11:00	-	+11	2018 Mar 11  4:00
+			8:00	-	+08
 Zone Antarctica/Davis	0	-	-00	1957 Jan 13
 			7:00	-	+07	1964 Nov
 			0	-	-00	1969 Feb
--- a/test/jdk/sun/util/calendar/zi/tzdata/asia	Mon Apr 09 13:35:19 2018 +0200
+++ b/test/jdk/sun/util/calendar/zi/tzdata/asia	Mon Apr 09 04:43:03 2018 -0700
@@ -92,13 +92,13 @@
 Rule	EUAsia	1981	max	-	Mar	lastSun	 1:00u	1:00	S
 Rule	EUAsia	1979	1995	-	Sep	lastSun	 1:00u	0	-
 Rule	EUAsia	1996	max	-	Oct	lastSun	 1:00u	0	-
-Rule E-EurAsia	1981	max	-	Mar	lastSun	 0:00	1:00	S
+Rule E-EurAsia	1981	max	-	Mar	lastSun	 0:00	1:00	-
 Rule E-EurAsia	1979	1995	-	Sep	lastSun	 0:00	0	-
 Rule E-EurAsia	1996	max	-	Oct	lastSun	 0:00	0	-
-Rule RussiaAsia	1981	1984	-	Apr	1	 0:00	1:00	S
+Rule RussiaAsia	1981	1984	-	Apr	1	 0:00	1:00	-
 Rule RussiaAsia	1981	1983	-	Oct	1	 0:00	0	-
 Rule RussiaAsia	1984	1995	-	Sep	lastSun	 2:00s	0	-
-Rule RussiaAsia	1985	2010	-	Mar	lastSun	 2:00s	1:00	S
+Rule RussiaAsia	1985	2010	-	Mar	lastSun	 2:00s	1:00	-
 Rule RussiaAsia	1996	2010	-	Oct	lastSun	 2:00s	0	-
 
 # Afghanistan
@@ -133,7 +133,7 @@
 # (brief)
 # http://www.worldtimezone.com/dst_news/dst_news_armenia03.html
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule Armenia	2011	only	-	Mar	lastSun	 2:00s	1:00	S
+Rule Armenia	2011	only	-	Mar	lastSun	 2:00s	1:00	-
 Rule Armenia	2011	only	-	Oct	lastSun	 2:00s	0	-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Asia/Yerevan	2:58:00 -	LMT	1924 May  2
@@ -159,7 +159,7 @@
 # http://en.apa.az/xeber_azerbaijan_abolishes_daylight_savings_ti_240862.html
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	Azer	1997	2015	-	Mar	lastSun	 4:00	1:00	S
+Rule	Azer	1997	2015	-	Mar	lastSun	 4:00	1:00	-
 Rule	Azer	1997	2015	-	Oct	lastSun	 5:00	0	-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Asia/Baku	3:19:24 -	LMT	1924 May  2
@@ -246,7 +246,7 @@
 # http://www.worldtimezone.com/dst_news/dst_news_bangladesh06.html
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	Dhaka	2009	only	-	Jun	19	23:00	1:00	S
+Rule	Dhaka	2009	only	-	Jun	19	23:00	1:00	-
 Rule	Dhaka	2009	only	-	Dec	31	24:00	0	-
 
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
@@ -787,8 +787,9 @@
 Rule	Macau	1975	1977	-	Apr	Sun>=15	3:30	1:00	D
 Rule	Macau	1978	1980	-	Apr	Sun>=15	0:00	1:00	D
 Rule	Macau	1978	1980	-	Oct	Sun>=15	0:00	0	S
+# See Europe/Lisbon for info about the 1912 transition.
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
-Zone	Asia/Macau	7:34:20 -	LMT	1912 Jan  1
+Zone	Asia/Macau	7:34:20 -	LMT	1911 Dec 31 16:00u
 			8:00	Macau	C%sT
 
 
@@ -1129,61 +1130,61 @@
 # thirtieth day of Shahrivar.
 #
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	Iran	1978	1980	-	Mar	21	0:00	1:00	D
-Rule	Iran	1978	only	-	Oct	21	0:00	0	S
-Rule	Iran	1979	only	-	Sep	19	0:00	0	S
-Rule	Iran	1980	only	-	Sep	23	0:00	0	S
-Rule	Iran	1991	only	-	May	 3	0:00	1:00	D
-Rule	Iran	1992	1995	-	Mar	22	0:00	1:00	D
-Rule	Iran	1991	1995	-	Sep	22	0:00	0	S
-Rule	Iran	1996	only	-	Mar	21	0:00	1:00	D
-Rule	Iran	1996	only	-	Sep	21	0:00	0	S
-Rule	Iran	1997	1999	-	Mar	22	0:00	1:00	D
-Rule	Iran	1997	1999	-	Sep	22	0:00	0	S
-Rule	Iran	2000	only	-	Mar	21	0:00	1:00	D
-Rule	Iran	2000	only	-	Sep	21	0:00	0	S
-Rule	Iran	2001	2003	-	Mar	22	0:00	1:00	D
-Rule	Iran	2001	2003	-	Sep	22	0:00	0	S
-Rule	Iran	2004	only	-	Mar	21	0:00	1:00	D
-Rule	Iran	2004	only	-	Sep	21	0:00	0	S
-Rule	Iran	2005	only	-	Mar	22	0:00	1:00	D
-Rule	Iran	2005	only	-	Sep	22	0:00	0	S
-Rule	Iran	2008	only	-	Mar	21	0:00	1:00	D
-Rule	Iran	2008	only	-	Sep	21	0:00	0	S
-Rule	Iran	2009	2011	-	Mar	22	0:00	1:00	D
-Rule	Iran	2009	2011	-	Sep	22	0:00	0	S
-Rule	Iran	2012	only	-	Mar	21	0:00	1:00	D
-Rule	Iran	2012	only	-	Sep	21	0:00	0	S
-Rule	Iran	2013	2015	-	Mar	22	0:00	1:00	D
-Rule	Iran	2013	2015	-	Sep	22	0:00	0	S
-Rule	Iran	2016	only	-	Mar	21	0:00	1:00	D
-Rule	Iran	2016	only	-	Sep	21	0:00	0	S
-Rule	Iran	2017	2019	-	Mar	22	0:00	1:00	D
-Rule	Iran	2017	2019	-	Sep	22	0:00	0	S
-Rule	Iran	2020	only	-	Mar	21	0:00	1:00	D
-Rule	Iran	2020	only	-	Sep	21	0:00	0	S
-Rule	Iran	2021	2023	-	Mar	22	0:00	1:00	D
-Rule	Iran	2021	2023	-	Sep	22	0:00	0	S
-Rule	Iran	2024	only	-	Mar	21	0:00	1:00	D
-Rule	Iran	2024	only	-	Sep	21	0:00	0	S
-Rule	Iran	2025	2027	-	Mar	22	0:00	1:00	D
-Rule	Iran	2025	2027	-	Sep	22	0:00	0	S
-Rule	Iran	2028	2029	-	Mar	21	0:00	1:00	D
-Rule	Iran	2028	2029	-	Sep	21	0:00	0	S
-Rule	Iran	2030	2031	-	Mar	22	0:00	1:00	D
-Rule	Iran	2030	2031	-	Sep	22	0:00	0	S
-Rule	Iran	2032	2033	-	Mar	21	0:00	1:00	D
-Rule	Iran	2032	2033	-	Sep	21	0:00	0	S
-Rule	Iran	2034	2035	-	Mar	22	0:00	1:00	D
-Rule	Iran	2034	2035	-	Sep	22	0:00	0	S
+Rule	Iran	1978	1980	-	Mar	21	0:00	1:00	-
+Rule	Iran	1978	only	-	Oct	21	0:00	0	-
+Rule	Iran	1979	only	-	Sep	19	0:00	0	-
+Rule	Iran	1980	only	-	Sep	23	0:00	0	-
+Rule	Iran	1991	only	-	May	 3	0:00	1:00	-
+Rule	Iran	1992	1995	-	Mar	22	0:00	1:00	-
+Rule	Iran	1991	1995	-	Sep	22	0:00	0	-
+Rule	Iran	1996	only	-	Mar	21	0:00	1:00	-
+Rule	Iran	1996	only	-	Sep	21	0:00	0	-
+Rule	Iran	1997	1999	-	Mar	22	0:00	1:00	-
+Rule	Iran	1997	1999	-	Sep	22	0:00	0	-
+Rule	Iran	2000	only	-	Mar	21	0:00	1:00	-
+Rule	Iran	2000	only	-	Sep	21	0:00	0	-
+Rule	Iran	2001	2003	-	Mar	22	0:00	1:00	-
+Rule	Iran	2001	2003	-	Sep	22	0:00	0	-
+Rule	Iran	2004	only	-	Mar	21	0:00	1:00	-
+Rule	Iran	2004	only	-	Sep	21	0:00	0	-
+Rule	Iran	2005	only	-	Mar	22	0:00	1:00	-
+Rule	Iran	2005	only	-	Sep	22	0:00	0	-
+Rule	Iran	2008	only	-	Mar	21	0:00	1:00	-
+Rule	Iran	2008	only	-	Sep	21	0:00	0	-
+Rule	Iran	2009	2011	-	Mar	22	0:00	1:00	-
+Rule	Iran	2009	2011	-	Sep	22	0:00	0	-
+Rule	Iran	2012	only	-	Mar	21	0:00	1:00	-
+Rule	Iran	2012	only	-	Sep	21	0:00	0	-
+Rule	Iran	2013	2015	-	Mar	22	0:00	1:00	-
+Rule	Iran	2013	2015	-	Sep	22	0:00	0	-
+Rule	Iran	2016	only	-	Mar	21	0:00	1:00	-
+Rule	Iran	2016	only	-	Sep	21	0:00	0	-
+Rule	Iran	2017	2019	-	Mar	22	0:00	1:00	-
+Rule	Iran	2017	2019	-	Sep	22	0:00	0	-
+Rule	Iran	2020	only	-	Mar	21	0:00	1:00	-
+Rule	Iran	2020	only	-	Sep	21	0:00	0	-
+Rule	Iran	2021	2023	-	Mar	22	0:00	1:00	-
+Rule	Iran	2021	2023	-	Sep	22	0:00	0	-
+Rule	Iran	2024	only	-	Mar	21	0:00	1:00	-
+Rule	Iran	2024	only	-	Sep	21	0:00	0	-
+Rule	Iran	2025	2027	-	Mar	22	0:00	1:00	-
+Rule	Iran	2025	2027	-	Sep	22	0:00	0	-
+Rule	Iran	2028	2029	-	Mar	21	0:00	1:00	-
+Rule	Iran	2028	2029	-	Sep	21	0:00	0	-
+Rule	Iran	2030	2031	-	Mar	22	0:00	1:00	-
+Rule	Iran	2030	2031	-	Sep	22	0:00	0	-
+Rule	Iran	2032	2033	-	Mar	21	0:00	1:00	-
+Rule	Iran	2032	2033	-	Sep	21	0:00	0	-
+Rule	Iran	2034	2035	-	Mar	22	0:00	1:00	-
+Rule	Iran	2034	2035	-	Sep	22	0:00	0	-
 #
 # The following rules are approximations starting in the year 2038.
 # These are the best post-2037 approximations available, given the
 # restrictions of a single rule using a Gregorian-based data format.
 # At some point this table will need to be extended, though quite
 # possibly Iran will change the rules first.
-Rule	Iran	2036	max	-	Mar	21	0:00	1:00	D
-Rule	Iran	2036	max	-	Sep	21	0:00	0	S
+Rule	Iran	2036	max	-	Mar	21	0:00	1:00	-
+Rule	Iran	2036	max	-	Sep	21	0:00	0	-
 
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Asia/Tehran	3:25:44	-	LMT	1916
@@ -1219,17 +1220,17 @@
 # https://www.timeanddate.com/news/time/iraq-dumps-daylight-saving.html
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	Iraq	1982	only	-	May	1	0:00	1:00	D
-Rule	Iraq	1982	1984	-	Oct	1	0:00	0	S
-Rule	Iraq	1983	only	-	Mar	31	0:00	1:00	D
-Rule	Iraq	1984	1985	-	Apr	1	0:00	1:00	D
-Rule	Iraq	1985	1990	-	Sep	lastSun	1:00s	0	S
-Rule	Iraq	1986	1990	-	Mar	lastSun	1:00s	1:00	D
+Rule	Iraq	1982	only	-	May	1	0:00	1:00	-
+Rule	Iraq	1982	1984	-	Oct	1	0:00	0	-
+Rule	Iraq	1983	only	-	Mar	31	0:00	1:00	-
+Rule	Iraq	1984	1985	-	Apr	1	0:00	1:00	-
+Rule	Iraq	1985	1990	-	Sep	lastSun	1:00s	0	-
+Rule	Iraq	1986	1990	-	Mar	lastSun	1:00s	1:00	-
 # IATA SSIM (1991/1996) says Apr 1 12:01am UTC; guess the ':01' is a typo.
 # Shanks & Pottenger say Iraq did not observe DST 1992/1997; ignore this.
 #
-Rule	Iraq	1991	2007	-	Apr	 1	3:00s	1:00	D
-Rule	Iraq	1991	2007	-	Oct	 1	3:00s	0	S
+Rule	Iraq	1991	2007	-	Apr	 1	3:00s	1:00	-
+Rule	Iraq	1991	2007	-	Oct	 1	3:00s	0	-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Asia/Baghdad	2:57:40	-	LMT	1890
 			2:57:36	-	BMT	1918     # Baghdad Mean Time?
@@ -1501,8 +1502,7 @@
 
 # From Hideyuki Suzuki (1998-11-09):
 # 'Tokyo' usually stands for the former location of Tokyo Astronomical
-# Observatory: 139 degrees 44' 40.90" E (9h 18m 58.727s),
-# 35 degrees 39' 16.0" N.
+# Observatory: 139° 44' 40.90" E (9h 18m 58.727s), 35° 39' 16.0" N.
 # This data is from 'Rika Nenpyou (Chronological Scientific Tables) 1996'
 # edited by National Astronomical Observatory of Japan....
 # JST (Japan Standard Time) has been used since 1888-01-01 00:00 (JST).
@@ -1510,10 +1510,10 @@
 
 # From Hideyuki Suzuki (1998-11-16):
 # The ordinance No. 51 (1886) established "standard time" in Japan,
-# which stands for the time on 135 degrees E.
+# which stands for the time on 135° E.
 # In the ordinance No. 167 (1895), "standard time" was renamed to "central
 # standard time".  And the same ordinance also established "western standard
-# time", which stands for the time on 120 degrees E....  But "western standard
+# time", which stands for the time on 120° E....  But "western standard
 # time" was abolished in the ordinance No. 529 (1937).  In the ordinance No.
 # 167, there is no mention regarding for what place western standard time is
 # standard....
@@ -1926,9 +1926,9 @@
 # From 2005-08-12 our GMT-offset is +6, w/o any daylight saving.
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	Kyrgyz	1992	1996	-	Apr	Sun>=7	0:00s	1:00	S
+Rule	Kyrgyz	1992	1996	-	Apr	Sun>=7	0:00s	1:00	-
 Rule	Kyrgyz	1992	1996	-	Sep	lastSun	0:00	0	-
-Rule	Kyrgyz	1997	2005	-	Mar	lastSun	2:30	1:00	S
+Rule	Kyrgyz	1997	2005	-	Mar	lastSun	2:30	1:00	-
 Rule	Kyrgyz	1997	2004	-	Oct	lastSun	2:30	0	-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Asia/Bishkek	4:58:24 -	LMT	1924 May  2
@@ -2060,7 +2060,7 @@
 
 # Malaysia
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	NBorneo	1935	1941	-	Sep	14	0:00	0:20	TS # one-Third Summer
+Rule	NBorneo	1935	1941	-	Sep	14	0:00	0:20	-
 Rule	NBorneo	1935	1941	-	Dec	14	0:00	0	-
 #
 # peninsular Malaysia
@@ -2205,7 +2205,7 @@
 # http://zasag.mn/news/view/8969
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	Mongol	1983	1984	-	Apr	1	0:00	1:00	S
+Rule	Mongol	1983	1984	-	Apr	1	0:00	1:00	-
 Rule	Mongol	1983	only	-	Oct	1	0:00	0	-
 # Shanks & Pottenger and IATA SSIM say 1990s switches occurred at 00:00,
 # but McDow says the 2001 switches occurred at 02:00.  Also, IATA SSIM
@@ -2222,13 +2222,13 @@
 # Mongolian Government meeting has concluded today to cancel daylight
 # saving time adoption in Mongolia.  Source: http://zasag.mn/news/view/16192
 
-Rule	Mongol	1985	1998	-	Mar	lastSun	0:00	1:00	S
+Rule	Mongol	1985	1998	-	Mar	lastSun	0:00	1:00	-
 Rule	Mongol	1984	1998	-	Sep	lastSun	0:00	0	-
 # IATA SSIM (1999-09) says Mongolia no longer observes DST.
-Rule	Mongol	2001	only	-	Apr	lastSat	2:00	1:00	S
+Rule	Mongol	2001	only	-	Apr	lastSat	2:00	1:00	-
 Rule	Mongol	2001	2006	-	Sep	lastSat	2:00	0	-
-Rule	Mongol	2002	2006	-	Mar	lastSat	2:00	1:00	S
-Rule	Mongol	2015	2016	-	Mar	lastSat	2:00	1:00	S
+Rule	Mongol	2002	2006	-	Mar	lastSat	2:00	1:00	-
+Rule	Mongol	2015	2016	-	Mar	lastSat	2:00	1:00	-
 Rule	Mongol	2015	2016	-	Sep	lastSat	0:00	0	-
 
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
@@ -2662,9 +2662,6 @@
 # [Google translation]: "The Council also decided to start daylight
 # saving in Palestine as of one o'clock on Saturday morning,
 # 2016-03-26, to provide the clock 60 minutes ahead."
-#
-# From Paul Eggert (2016-03-12):
-# Predict spring transitions on March's last Saturday at 01:00 from now on.
 
 # From Sharef Mustafa (2016-10-19):
 # [T]he Palestinian cabinet decision (Mar 8th 2016) published on
@@ -2681,6 +2678,16 @@
 # https://www.timeanddate.com/time/change/gaza-strip/gaza
 # https://www.timeanddate.com/time/change/west-bank/hebron
 
+# From Sharef Mustafa (2018-03-16):
+# Palestine summer time will start on Mar 24th 2018 by advancing the
+# clock by 60 minutes as per Palestinian cabinet decision published on
+# the offical website, though the decree did not specify the exact
+# time of the time shift.
+# http://www.palestinecabinet.gov.ps/Website/AR/NDecrees/ViewFile.ashx?ID=e7a42ab7-ee23-435a-b9c8-a4f7e81f3817
+#
+# From Paul Eggert (2018-03-16):
+# For 2016 on, predict spring transitions on March's fourth Saturday at 01:00.
+
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 Rule EgyptAsia	1957	only	-	May	10	0:00	1:00	S
 Rule EgyptAsia	1957	1958	-	Oct	 1	0:00	0	-
@@ -2710,7 +2717,7 @@
 Rule Palestine	2013	only	-	Sep	Fri>=21	0:00	0	-
 Rule Palestine	2014	2015	-	Oct	Fri>=21	0:00	0	-
 Rule Palestine	2015	only	-	Mar	lastFri	24:00	1:00	S
-Rule Palestine	2016	max	-	Mar	lastSat	1:00	1:00	S
+Rule Palestine	2016	max	-	Mar	Sat>=22	1:00	1:00	S
 Rule Palestine	2016	max	-	Oct	lastSat	1:00	0	-
 
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
@@ -2760,11 +2767,11 @@
 # http://www.philstar.com/headlines/2014/08/05/1354152/pnoy-urged-declare-use-daylight-saving-time
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	Phil	1936	only	-	Nov	1	0:00	1:00	S
+Rule	Phil	1936	only	-	Nov	1	0:00	1:00	-
 Rule	Phil	1937	only	-	Feb	1	0:00	0	-
-Rule	Phil	1954	only	-	Apr	12	0:00	1:00	S
+Rule	Phil	1954	only	-	Apr	12	0:00	1:00	-
 Rule	Phil	1954	only	-	Jul	1	0:00	0	-
-Rule	Phil	1978	only	-	Mar	22	0:00	1:00	S
+Rule	Phil	1978	only	-	Mar	22	0:00	1:00	-
 Rule	Phil	1978	only	-	Sep	21	0:00	0	-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Asia/Manila	-15:56:00 -	LMT	1844 Dec 31
@@ -3120,9 +3127,9 @@
 # and is the basis for the information below.
 #
 # The 1906 transition was effective July 1 and standardized Indochina to
-# Phù Liễn Observatory, legally 104 deg. 17'17" east of Paris.
+# Phù Liễn Observatory, legally 104° 17' 17" east of Paris.
 # It's unclear whether this meant legal Paris Mean Time (00:09:21) or
-# the Paris Meridian (2 deg. 20'14.03" E); the former yields 07:06:30.1333...
+# the Paris Meridian (2° 20' 14.03" E); the former yields 07:06:30.1333...
 # and the latter 07:06:29.333... so either way it rounds to 07:06:30,
 # which is used below even though the modern-day Phù Liễn Observatory
 # is closer to 07:06:31.  Abbreviate Phù Liễn Mean Time as PLMT.
--- a/test/jdk/sun/util/calendar/zi/tzdata/australasia	Mon Apr 09 13:35:19 2018 +0200
+++ b/test/jdk/sun/util/calendar/zi/tzdata/australasia	Mon Apr 09 04:43:03 2018 -0700
@@ -219,20 +219,20 @@
 
 # Lord Howe Island
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	LH	1981	1984	-	Oct	lastSun	2:00	1:00	D
-Rule	LH	1982	1985	-	Mar	Sun>=1	2:00	0	S
-Rule	LH	1985	only	-	Oct	lastSun	2:00	0:30	D
-Rule	LH	1986	1989	-	Mar	Sun>=15	2:00	0	S
-Rule	LH	1986	only	-	Oct	19	2:00	0:30	D
-Rule	LH	1987	1999	-	Oct	lastSun	2:00	0:30	D
-Rule	LH	1990	1995	-	Mar	Sun>=1	2:00	0	S
-Rule	LH	1996	2005	-	Mar	lastSun	2:00	0	S
-Rule	LH	2000	only	-	Aug	lastSun	2:00	0:30	D
-Rule	LH	2001	2007	-	Oct	lastSun	2:00	0:30	D
-Rule	LH	2006	only	-	Apr	Sun>=1	2:00	0	S
-Rule	LH	2007	only	-	Mar	lastSun	2:00	0	S
-Rule	LH	2008	max	-	Apr	Sun>=1	2:00	0	S
-Rule	LH	2008	max	-	Oct	Sun>=1	2:00	0:30	D
+Rule	LH	1981	1984	-	Oct	lastSun	2:00	1:00	-
+Rule	LH	1982	1985	-	Mar	Sun>=1	2:00	0	-
+Rule	LH	1985	only	-	Oct	lastSun	2:00	0:30	-
+Rule	LH	1986	1989	-	Mar	Sun>=15	2:00	0	-
+Rule	LH	1986	only	-	Oct	19	2:00	0:30	-
+Rule	LH	1987	1999	-	Oct	lastSun	2:00	0:30	-
+Rule	LH	1990	1995	-	Mar	Sun>=1	2:00	0	-
+Rule	LH	1996	2005	-	Mar	lastSun	2:00	0	-
+Rule	LH	2000	only	-	Aug	lastSun	2:00	0:30	-
+Rule	LH	2001	2007	-	Oct	lastSun	2:00	0:30	-
+Rule	LH	2006	only	-	Apr	Sun>=1	2:00	0	-
+Rule	LH	2007	only	-	Mar	lastSun	2:00	0	-
+Rule	LH	2008	max	-	Apr	Sun>=1	2:00	0	-
+Rule	LH	2008	max	-	Oct	Sun>=1	2:00	0:30	-
 Zone Australia/Lord_Howe 10:36:20 -	LMT	1895 Feb
 			10:00	-	AEST	1981 Mar
 			10:30	LH	+1030/+1130 1985 Jul
@@ -390,15 +390,15 @@
 # practice than guessing no DST.
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	Fiji	1998	1999	-	Nov	Sun>=1	2:00	1:00	S
+Rule	Fiji	1998	1999	-	Nov	Sun>=1	2:00	1:00	-
 Rule	Fiji	1999	2000	-	Feb	lastSun	3:00	0	-
-Rule	Fiji	2009	only	-	Nov	29	2:00	1:00	S
+Rule	Fiji	2009	only	-	Nov	29	2:00	1:00	-
 Rule	Fiji	2010	only	-	Mar	lastSun	3:00	0	-
-Rule	Fiji	2010	2013	-	Oct	Sun>=21	2:00	1:00	S
+Rule	Fiji	2010	2013	-	Oct	Sun>=21	2:00	1:00	-
 Rule	Fiji	2011	only	-	Mar	Sun>=1	3:00	0	-
 Rule	Fiji	2012	2013	-	Jan	Sun>=18	3:00	0	-
 Rule	Fiji	2014	only	-	Jan	Sun>=18	2:00	0	-
-Rule	Fiji	2014	max	-	Nov	Sun>=1	2:00	1:00	S
+Rule	Fiji	2014	max	-	Nov	Sun>=1	2:00	1:00	-
 Rule	Fiji	2015	max	-	Jan	Sun>=14	3:00	0	-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Pacific/Fiji	11:55:44 -	LMT	1915 Oct 26 # Suva
@@ -429,11 +429,11 @@
 			 12:00	-	+12
 Zone Pacific/Enderbury	-11:24:20 -	LMT	1901
 			-12:00	-	-12	1979 Oct
-			-11:00	-	-11	1995
+			-11:00	-	-11	1994 Dec 31
 			 13:00	-	+13
 Zone Pacific/Kiritimati	-10:29:20 -	LMT	1901
 			-10:40	-	-1040	1979 Oct
-			-10:00	-	-10	1995
+			-10:00	-	-10	1994 Dec 31
 			 14:00	-	+14
 
 # N Mariana Is
@@ -470,9 +470,9 @@
 
 # New Caledonia
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	NC	1977	1978	-	Dec	Sun>=1	0:00	1:00	S
+Rule	NC	1977	1978	-	Dec	Sun>=1	0:00	1:00	-
 Rule	NC	1978	1979	-	Feb	27	0:00	0	-
-Rule	NC	1996	only	-	Dec	 1	2:00s	1:00	S
+Rule	NC	1996	only	-	Dec	 1	2:00s	1:00	-
 # Shanks & Pottenger say the following was at 2:00; go with IATA.
 Rule	NC	1997	only	-	Mar	 2	2:00s	0	-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
@@ -492,27 +492,28 @@
 Rule	NZ	1934	1940	-	Apr	lastSun	2:00	0	M
 Rule	NZ	1934	1940	-	Sep	lastSun	2:00	0:30	S
 Rule	NZ	1946	only	-	Jan	 1	0:00	0	S
-# Since 1957 Chatham has been 45 minutes ahead of NZ, but there's no
-# convenient single notation for the date and time of this transition
-# so we must duplicate the Rule lines.
+# Since 1957 Chatham has been 45 minutes ahead of NZ, but until 2018a
+# there was no documented single notation for the date and time of this
+# transition.  Duplicate the Rule lines for now, to give the 2018a change
+# time to percolate out.
 Rule	NZ	1974	only	-	Nov	Sun>=1	2:00s	1:00	D
-Rule	Chatham	1974	only	-	Nov	Sun>=1	2:45s	1:00	D
+Rule	Chatham	1974	only	-	Nov	Sun>=1	2:45s	1:00	-
 Rule	NZ	1975	only	-	Feb	lastSun	2:00s	0	S
-Rule	Chatham	1975	only	-	Feb	lastSun	2:45s	0	S
+Rule	Chatham	1975	only	-	Feb	lastSun	2:45s	0	-
 Rule	NZ	1975	1988	-	Oct	lastSun	2:00s	1:00	D
-Rule	Chatham	1975	1988	-	Oct	lastSun	2:45s	1:00	D
+Rule	Chatham	1975	1988	-	Oct	lastSun	2:45s	1:00	-
 Rule	NZ	1976	1989	-	Mar	Sun>=1	2:00s	0	S
-Rule	Chatham	1976	1989	-	Mar	Sun>=1	2:45s	0	S
+Rule	Chatham	1976	1989	-	Mar	Sun>=1	2:45s	0	-
 Rule	NZ	1989	only	-	Oct	Sun>=8	2:00s	1:00	D
-Rule	Chatham	1989	only	-	Oct	Sun>=8	2:45s	1:00	D
+Rule	Chatham	1989	only	-	Oct	Sun>=8	2:45s	1:00	-
 Rule	NZ	1990	2006	-	Oct	Sun>=1	2:00s	1:00	D
-Rule	Chatham	1990	2006	-	Oct	Sun>=1	2:45s	1:00	D
+Rule	Chatham	1990	2006	-	Oct	Sun>=1	2:45s	1:00	-
 Rule	NZ	1990	2007	-	Mar	Sun>=15	2:00s	0	S
-Rule	Chatham	1990	2007	-	Mar	Sun>=15	2:45s	0	S
+Rule	Chatham	1990	2007	-	Mar	Sun>=15	2:45s	0	-
 Rule	NZ	2007	max	-	Sep	lastSun	2:00s	1:00	D
-Rule	Chatham	2007	max	-	Sep	lastSun	2:45s	1:00	D
+Rule	Chatham	2007	max	-	Sep	lastSun	2:45s	1:00	-
 Rule	NZ	2008	max	-	Apr	Sun>=1	2:00s	0	S
-Rule	Chatham	2008	max	-	Apr	Sun>=1	2:45s	0	S
+Rule	Chatham	2008	max	-	Apr	Sun>=1	2:45s	0	-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone Pacific/Auckland	11:39:04 -	LMT	1868 Nov  2
 			11:30	NZ	NZ%sT	1946 Jan  1
@@ -536,9 +537,9 @@
 # Cook Is
 # From Shanks & Pottenger:
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	Cook	1978	only	-	Nov	12	0:00	0:30	HS
+Rule	Cook	1978	only	-	Nov	12	0:00	0:30	-
 Rule	Cook	1979	1991	-	Mar	Sun>=1	0:00	0	-
-Rule	Cook	1979	1990	-	Oct	lastSun	0:00	0:30	HS
+Rule	Cook	1979	1990	-	Oct	lastSun	0:00	0:30	-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone Pacific/Rarotonga	-10:39:04 -	LMT	1901        # Avarua
 			-10:30	-	-1030	1978 Nov 12
@@ -679,11 +680,11 @@
 # Assume the pattern instituted in 2012 will continue indefinitely.
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	WS	2010	only	-	Sep	lastSun	0:00	1	D
-Rule	WS	2011	only	-	Apr	Sat>=1	4:00	0	S
-Rule	WS	2011	only	-	Sep	lastSat	3:00	1	D
-Rule	WS	2012	max	-	Apr	Sun>=1	4:00	0	S
-Rule	WS	2012	max	-	Sep	lastSun	3:00	1	D
+Rule	WS	2010	only	-	Sep	lastSun	0:00	1	-
+Rule	WS	2011	only	-	Apr	Sat>=1	4:00	0	-
+Rule	WS	2011	only	-	Sep	lastSat	3:00	1	-
+Rule	WS	2012	max	-	Apr	Sun>=1	4:00	0	-
+Rule	WS	2012	max	-	Sep	lastSun	3:00	1	-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone Pacific/Apia	 12:33:04 -	LMT	1892 Jul  5
 			-11:26:56 -	LMT	1911
@@ -723,11 +724,11 @@
 
 # Tonga
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	Tonga	1999	only	-	Oct	 7	2:00s	1:00	S
+Rule	Tonga	1999	only	-	Oct	 7	2:00s	1:00	-
 Rule	Tonga	2000	only	-	Mar	19	2:00s	0	-
-Rule	Tonga	2000	2001	-	Nov	Sun>=1	2:00	1:00	S
+Rule	Tonga	2000	2001	-	Nov	Sun>=1	2:00	1:00	-
 Rule	Tonga	2001	2002	-	Jan	lastSun	2:00	0	-
-Rule	Tonga	2016	only	-	Nov	Sun>=1	2:00	1:00	S
+Rule	Tonga	2016	only	-	Nov	Sun>=1	2:00	1:00	-
 Rule	Tonga	2017	only	-	Jan	Sun>=15	3:00	0	-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone Pacific/Tongatapu	12:19:20 -	LMT	1901
@@ -804,12 +805,12 @@
 
 # Vanuatu
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	Vanuatu	1983	only	-	Sep	25	0:00	1:00	S
+Rule	Vanuatu	1983	only	-	Sep	25	0:00	1:00	-
 Rule	Vanuatu	1984	1991	-	Mar	Sun>=23	0:00	0	-
-Rule	Vanuatu	1984	only	-	Oct	23	0:00	1:00	S
-Rule	Vanuatu	1985	1991	-	Sep	Sun>=23	0:00	1:00	S
+Rule	Vanuatu	1984	only	-	Oct	23	0:00	1:00	-
+Rule	Vanuatu	1985	1991	-	Sep	Sun>=23	0:00	1:00	-
 Rule	Vanuatu	1992	1993	-	Jan	Sun>=23	0:00	0	-
-Rule	Vanuatu	1992	only	-	Oct	Sun>=23	0:00	1:00	S
+Rule	Vanuatu	1992	only	-	Oct	Sun>=23	0:00	1:00	-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Pacific/Efate	11:13:16 -	LMT	1912 Jan 13 # Vila
 			11:00	Vanuatu	+11/+12
@@ -1108,6 +1109,13 @@
 # South Australian time even though it's located in Western Australia.
 
 # Queensland
+
+# From Paul Eggert (2018-02-26):
+# I lack access to the following source for Queensland DST:
+# Pearce C. History of daylight saving time in Queensland.
+# Queensland Hist J. 2017 Aug;23(6):389-403
+# https://search.informit.com.au/documentSummary;dn=994682348436426;res=IELHSS
+
 # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
 # #   The state of QUEENSLAND.. [ Courtesy Qld. Dept Premier Econ&Trade Devel ]
 # #						[ Dec 1990 ]
@@ -1534,6 +1542,12 @@
 # "declared it the same day [throughout] the country as of Jan. 1, 1995"
 # as part of the competition to be first into the 21st century.
 
+# From Kerry Shetline (2018-02-03):
+# December 31 was the day that was skipped, so that the transition
+# would be from Friday December 30, 1994 to Sunday January 1, 1995.
+# From Paul Eggert (2018-02-04):
+# One source for this is page 202 of: Bartky IR. One Time Fits All:
+# The Campaigns for Global Uniformity (2007).
 
 # Kwajalein
 
@@ -1626,7 +1640,7 @@
 
 # From Howie Phelps (1999-11-10), who talked to a Pitcairner via shortwave:
 # Betty Christian told me yesterday that their local time is the same as
-# Pacific Standard Time. They used to be 1/2 hour different from us here in
+# Pacific Standard Time. They used to be ½ hour different from us here in
 # Sacramento but it was changed a couple of years ago.
 
 
@@ -1665,7 +1679,7 @@
 # 12 hours and 20 minutes ahead of GMT.  When New Zealand adjusted its
 # standard time in 1940s, Tonga had the choice of subtracting from its
 # local time to come on the same standard time as New Zealand or of
-# advancing its time to maintain the differential of 13 degrees
+# advancing its time to maintain the differential of 13°
 # (approximately 50 minutes ahead of New Zealand time).
 #
 # Because His Majesty King Tāufaʻāhau Tupou IV, then Crown Prince
--- a/test/jdk/sun/util/calendar/zi/tzdata/europe	Mon Apr 09 13:35:19 2018 +0200
+++ b/test/jdk/sun/util/calendar/zi/tzdata/europe	Mon Apr 09 04:43:03 2018 -0700
@@ -140,8 +140,8 @@
 # along the towpath within a few yards of it.'
 #
 # I have a one inch to one mile map of London and my estimate of the stone's
-# position is 51 degrees 28' 30" N, 0 degrees 18' 45" W. The longitude should
-# be within about +-2". The Ordnance Survey grid reference is TQ172761.
+# position is 51° 28' 30" N, 0° 18' 45" W. The longitude should
+# be within about ±2". The Ordnance Survey grid reference is TQ172761.
 #
 # [This yields GMTOFF = -0:01:15 for London LMT in the 18th century.]
 
@@ -181,7 +181,7 @@
 # after-hours daylight in which to pursue his research.
 # In 1895 he presented a paper to the Wellington Philosophical Society
 # that proposed a two-hour daylight-saving shift.  See:
-# Hudson GV. On seasonal time-adjustment in countries south of lat. 30 deg.
+# Hudson GV. On seasonal time-adjustment in countries south of lat. 30°.
 # Transactions and Proceedings of the New Zealand Institute. 1895;28:734
 # http://rsnz.natlib.govt.nz/volume/rsnz_28/rsnz_28_00_006110.html
 # Although some interest was expressed in New Zealand, his proposal
@@ -531,11 +531,25 @@
 Link	Europe/London	Europe/Guernsey
 Link	Europe/London	Europe/Isle_of_Man
 
-# From Paul Eggert (2018-01-19):
+# From Paul Eggert (2018-02-15):
+# In January 2018 we discovered that the negative SAVE values in the
+# Eire rules cause problems with tests for ICU:
+# https://mm.icann.org/pipermail/tz/2018-January/025825.html
+# and with tests for OpenJDK:
+# https://mm.icann.org/pipermail/tz/2018-January/025822.html
+#
+# To work around this problem, the build procedure can translate the
+# following data into two forms, one with negative SAVE values and the
+# other form with a traditional approximation for Irish time stamps
+# after 1971-10-31 02:00 UTC; although this approximation has tm_isdst
+# flags that are reversed, its UTC offsets are correct and this often
+# suffices.  This source file currently uses only nonnegative SAVE
+# values, but this is intended to change and downstream code should
+# not rely on it.
+#
 # The following is like GB-Eire and EU, except with standard time in
-# summer and negative daylight saving time in winter.
-# Although currently commented out, this will need to become uncommented
-# once the ICU/OpenJDK workaround is removed; see below.
+# summer and negative daylight saving time in winter.  It is for when
+# negative SAVE values are used.
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 #Rule	Eire	1971	only	-	Oct	31	 2:00u	-1:00	GMT
 #Rule	Eire	1972	1980	-	Mar	Sun>=16	 2:00u	0	IST
@@ -556,24 +570,12 @@
 			 0:00	1:00	IST	1947 Nov  2  2:00s
 			 0:00	-	GMT	1948 Apr 18  2:00s
 			 0:00	GB-Eire	GMT/IST	1968 Oct 27
-# From Paul Eggert (2018-01-18):
-# The next line should look like this:
+# The next line is for when negative SAVE values are used.
 #			 1:00	Eire	IST/GMT
-# However, in January 2018 we discovered that the Eire rules cause
-# problems with tests for ICU:
-# https://mm.icann.org/pipermail/tz/2018-January/025825.html
-# and with tests for OpenJDK:
-# https://mm.icann.org/pipermail/tz/2018-January/025822.html
-# To work around this problem, use a traditional approximation for
-# time stamps after 1971-10-31 02:00 UTC, to give ICU and OpenJDK
-# developers breathing room to fix bugs.  This approximation has
-# correct UTC offsets, but results in tm_isdst flags are the reverse
-# of what they should be.  This workaround is temporary and should be
-# removed reasonably soon.
+# These three lines are for when SAVE values are always nonnegative.
 			 1:00	-	IST	1971 Oct 31  2:00u
 			 0:00	GB-Eire	GMT/IST	1996
 			 0:00	EU	GMT/IST
-# End of workaround for ICU and OpenJDK bugs.
 
 
 ###############################################################################
@@ -1557,21 +1559,21 @@
 # http://www.almanak.hi.is/klukkan.html
 #
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	Iceland	1917	1919	-	Feb	19	23:00	1:00	S
+Rule	Iceland	1917	1919	-	Feb	19	23:00	1:00	-
 Rule	Iceland	1917	only	-	Oct	21	 1:00	0	-
 Rule	Iceland	1918	1919	-	Nov	16	 1:00	0	-
-Rule	Iceland	1921	only	-	Mar	19	23:00	1:00	S
+Rule	Iceland	1921	only	-	Mar	19	23:00	1:00	-
 Rule	Iceland	1921	only	-	Jun	23	 1:00	0	-
-Rule	Iceland	1939	only	-	Apr	29	23:00	1:00	S
+Rule	Iceland	1939	only	-	Apr	29	23:00	1:00	-
 Rule	Iceland	1939	only	-	Oct	29	 2:00	0	-
-Rule	Iceland	1940	only	-	Feb	25	 2:00	1:00	S
+Rule	Iceland	1940	only	-	Feb	25	 2:00	1:00	-
 Rule	Iceland	1940	1941	-	Nov	Sun>=2	 1:00s	0	-
-Rule	Iceland	1941	1942	-	Mar	Sun>=2	 1:00s	1:00	S
+Rule	Iceland	1941	1942	-	Mar	Sun>=2	 1:00s	1:00	-
 # 1943-1946 - first Sunday in March until first Sunday in winter
-Rule	Iceland	1943	1946	-	Mar	Sun>=1	 1:00s	1:00	S
+Rule	Iceland	1943	1946	-	Mar	Sun>=1	 1:00s	1:00	-
 Rule	Iceland	1942	1948	-	Oct	Sun>=22	 1:00s	0	-
 # 1947-1967 - first Sunday in April until first Sunday in winter
-Rule	Iceland	1947	1967	-	Apr	Sun>=1	 1:00s	1:00	S
+Rule	Iceland	1947	1967	-	Apr	Sun>=1	 1:00s	1:00	-
 # 1949 and 1967 Oct transitions delayed by 1 week
 Rule	Iceland	1949	only	-	Oct	30	 1:00s	0	-
 Rule	Iceland	1950	1966	-	Oct	Sun>=22	 1:00s	0	-
@@ -2161,15 +2163,19 @@
 			1:00	EU	CE%sT
 
 # Portugal
-#
+
 # From Paul Eggert (2014-08-11), after a heads-up from Stephen Colebourne:
 # According to a Portuguese decree (1911-05-26)
 # https://dre.pt/application/dir/pdf1sdip/1911/05/12500/23132313.pdf
 # Lisbon was at -0:36:44.68, but switched to GMT on 1912-01-01 at 00:00.
-# Round the old offset to -0:36:45.  This agrees with Willett but disagrees
-# with Shanks, who says the transition occurred on 1911-05-24 at 00:00 for
-# Europe/Lisbon, Atlantic/Azores, and Atlantic/Madeira.
+# Round the old offset to -0:36:45.  This agrees with Willett....
 #
+# From Michael Deckers (2018-02-15):
+# article 5 [of the 1911 decree; Deckers's translation] ...:
+# These dispositions shall enter into force at the instant at which,
+# according to the 2nd article, the civil day January 1, 1912 begins,
+# all clocks therefore having to be advanced or set back correspondingly ...
+
 # From Rui Pedro Salgueiro (1992-11-12):
 # Portugal has recently (September, 27) changed timezone
 # (from WET to MET or CET) to harmonize with EEC.
@@ -2252,7 +2258,7 @@
 #
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Europe/Lisbon	-0:36:45 -	LMT	1884
-			-0:36:45 -	LMT	1912 Jan  1 # Lisbon Mean Time
+			-0:36:45 -	LMT	1912 Jan  1  0:00u # Lisbon MT
 			 0:00	Port	WE%sT	1966 Apr  3  2:00
 			 1:00	-	CET	1976 Sep 26  1:00
 			 0:00	Port	WE%sT	1983 Sep 25  1:00s
@@ -2261,7 +2267,7 @@
 			 0:00	EU	WE%sT
 # This Zone can be simplified once we assume zic %z.
 Zone Atlantic/Azores	-1:42:40 -	LMT	1884        # Ponta Delgada
-			-1:54:32 -	HMT	1912 Jan  1 # Horta Mean Time
+			-1:54:32 -	HMT	1912 Jan  1  2:00u # Horta MT
 			-2:00	Port	-02/-01	1942 Apr 25 22:00s
 			-2:00	Port	+00	1942 Aug 15 22:00s
 			-2:00	Port	-02/-01	1943 Apr 17 22:00s
@@ -2277,7 +2283,7 @@
 			-1:00	EU	-01/+00
 # This Zone can be simplified once we assume zic %z.
 Zone Atlantic/Madeira	-1:07:36 -	LMT	1884        # Funchal
-			-1:07:36 -	FMT	1912 Jan  1 # Funchal Mean Time
+			-1:07:36 -	FMT	1912 Jan  1  1:00u # Funchal MT
 			-1:00	Port	-01/+00	1942 Apr 25 22:00s
 			-1:00	Port	+01	1942 Aug 15 22:00s
 			-1:00	Port	-01/+00	1943 Apr 17 22:00s
@@ -2615,13 +2621,13 @@
 
 # From Vladimir Karpinsky (2014-07-08):
 # LMT in Moscow (before Jul 3, 1916) is 2:30:17, that was defined by Moscow
-# Observatory (coordinates: 55 deg. 45'29.70", 37 deg. 34'05.30")....
+# Observatory (coordinates: 55° 45' 29.70", 37° 34' 05.30")....
 # LMT in Moscow since Jul 3, 1916 is 2:31:01 as a result of new standard.
 # (The info is from the book by Byalokoz ... p. 18.)
 # The time in St. Petersburg as capital of Russia was defined by
 # Pulkov observatory, near St. Petersburg.  In 1916 LMT Moscow
 # was synchronized with LMT St. Petersburg (+30 minutes), (Pulkov observatory
-# coordinates: 59 deg. 46'18.70", 30 deg. 19'40.70") so 30 deg. 19'40.70" >
+# coordinates: 59° 46' 18.70", 30° 19' 40.70") so 30° 19' 40.70" >
 # 2h01m18.7s = 2:01:19.  LMT Moscow = LMT St.Petersburg + 30m 2:01:19 + 0:30 =
 # 2:31:19 ...
 #
@@ -3450,7 +3456,7 @@
 # three degrees, or twelve minutes of time, to the west of the
 # meridian of the Observatory of Stockholm".  The law is dated 1878-05-31.
 #
-# The observatory at that time had the meridian 18 degrees 03' 30"
+# The observatory at that time had the meridian 18° 03' 30"
 # eastern longitude = 01:12:14 in time.  Less 12 minutes gives the
 # national standard time as 01:00:14 ahead of GMT....
 #
@@ -3554,7 +3560,7 @@
 # From Alois Treindl (2013-09-11):
 # The Federal regulations say
 # https://www.admin.ch/opc/de/classified-compilation/20071096/index.html
-# ... the meridian for Bern mean time ... is 7 degrees 26' 22.50".
+# ... the meridian for Bern mean time ... is 7° 26' 22.50".
 # Expressed in time, it is 0h29m45.5s.
 
 # From Pierre-Yves Berger (2013-09-11):
--- a/test/jdk/sun/util/calendar/zi/tzdata/northamerica	Mon Apr 09 13:35:19 2018 +0200
+++ b/test/jdk/sun/util/calendar/zi/tzdata/northamerica	Mon Apr 09 04:43:03 2018 -0700
@@ -48,7 +48,7 @@
 # in New York City (1869-10).  His 1870 proposal was based on Washington, DC,
 # but in 1872-05 he moved the proposed origin to Greenwich.
 
-# From Paul Eggert (2016-09-21):
+# From Paul Eggert (2018-03-20):
 # Dowd's proposal left many details unresolved, such as where to draw
 # lines between time zones.  The key individual who made time zones
 # work in the US was William Frederick Allen - railway engineer,
@@ -59,10 +59,9 @@
 # to the General Time Convention on 1883-04-11, saying that his plan
 # meant "local time would be practically abolished" - a plus for
 # railway scheduling.  By the next convention on 1883-10-11 nearly all
-# railroads had agreed and it took effect on 1883-11-18 at 12:00.
-# That Sunday was called the "day of two noons", as the eastern parts
-# of the new zones observed noon twice.  Allen witnessed the
-# transition in New York City, writing:
+# railroads had agreed and it took effect on 1883-11-18.  That Sunday
+# was called the "day of two noons", as some locations observed noon
+# twice.  Allen witnessed the transition in New York City, writing:
 #
 #   I heard the bells of St. Paul's strike on the old time.  Four
 #   minutes later, obedient to the electrical signal from the Naval
@@ -447,8 +446,7 @@
 # ...according to the Census Bureau, the largest city is Beulah (although
 # it's commonly referred to as Beulah-Hazen, with Hazen being the next
 # largest city in Mercer County).  Google Maps places Beulah's city hall
-# at 47 degrees 15' 51" N, 101 degrees 46' 40" W, which yields an offset
-# of 6h47'07".
+# at 47° 15' 51" N, 101° 46' 40" W, which yields an offset of 6h47'07".
 
 Zone America/North_Dakota/Beulah -6:47:07 - LMT	1883 Nov 18 12:12:53
 			-7:00	US	M%sT	2010 Nov  7  2:00
@@ -481,7 +479,7 @@
 # California, northern Idaho (Benewah, Bonner, Boundary, Clearwater,
 # Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, Idaho county
 # north of the Salmon River, and the towns of Burgdorf and Warren),
-# Nevada (except West Wendover), Oregon (except the northern 3/4 of
+# Nevada (except West Wendover), Oregon (except the northern ¾ of
 # Malheur county), and Washington
 
 # From Paul Eggert (2016-08-20):
@@ -979,6 +977,13 @@
 			-5:00	-	EST	2006
 			-5:00	US	E%sT
 
+# From Paul Eggert (2018-03-20):
+# The Louisville & Nashville Railroad's 1883-11-18 change occurred at
+# 10:00 old local time; train were supposed to come to a standstill
+# for precisely 18 minutes.  See Bartky Fig. 1 (page 50).  It is not
+# clear how this matched civil time in Louisville, so for now continue
+# to assume Louisville switched at noon new local time, like New York.
+#
 # Part of Kentucky left its clocks alone in 1974.
 # This also includes Clark, Floyd, and Harrison counties in Indiana.
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
@@ -3287,8 +3292,8 @@
 # http://www.jamaicaobserver.com/columns/The-politician-in-all-of-us_17573647
 #
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
-Zone	America/Jamaica	-5:07:11 -	LMT	1890        # Kingston
-			-5:07:11 -	KMT	1912 Feb    # Kingston Mean Time
+Zone	America/Jamaica	-5:07:10 -	LMT	1890        # Kingston
+			-5:07:10 -	KMT	1912 Feb    # Kingston Mean Time
 			-5:00	-	EST	1974
 			-5:00	US	E%sT	1984
 			-5:00	-	EST
@@ -3438,7 +3443,7 @@
 #
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone America/Grand_Turk	-4:44:32 -	LMT	1890
-			-5:07:11 -	KMT	1912 Feb # Kingston Mean Time
+			-5:07:10 -	KMT	1912 Feb # Kingston Mean Time
 			-5:00	-	EST	1979
 			-5:00	US	E%sT	2015 Nov Sun>=1 2:00
 			-4:00	-	AST	2018 Mar 11 3:00
--- a/test/jdk/sun/util/calendar/zi/tzdata/southamerica	Mon Apr 09 13:35:19 2018 +0200
+++ b/test/jdk/sun/util/calendar/zi/tzdata/southamerica	Mon Apr 09 04:43:03 2018 -0700
@@ -70,28 +70,28 @@
 # AR was chosen because they are the ISO letters that represent Argentina.
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	Arg	1930	only	-	Dec	 1	0:00	1:00	S
+Rule	Arg	1930	only	-	Dec	 1	0:00	1:00	-
 Rule	Arg	1931	only	-	Apr	 1	0:00	0	-
-Rule	Arg	1931	only	-	Oct	15	0:00	1:00	S
+Rule	Arg	1931	only	-	Oct	15	0:00	1:00	-
 Rule	Arg	1932	1940	-	Mar	 1	0:00	0	-
-Rule	Arg	1932	1939	-	Nov	 1	0:00	1:00	S
-Rule	Arg	1940	only	-	Jul	 1	0:00	1:00	S
+Rule	Arg	1932	1939	-	Nov	 1	0:00	1:00	-
+Rule	Arg	1940	only	-	Jul	 1	0:00	1:00	-
 Rule	Arg	1941	only	-	Jun	15	0:00	0	-
-Rule	Arg	1941	only	-	Oct	15	0:00	1:00	S
+Rule	Arg	1941	only	-	Oct	15	0:00	1:00	-
 Rule	Arg	1943	only	-	Aug	 1	0:00	0	-
-Rule	Arg	1943	only	-	Oct	15	0:00	1:00	S
+Rule	Arg	1943	only	-	Oct	15	0:00	1:00	-
 Rule	Arg	1946	only	-	Mar	 1	0:00	0	-
-Rule	Arg	1946	only	-	Oct	 1	0:00	1:00	S
+Rule	Arg	1946	only	-	Oct	 1	0:00	1:00	-
 Rule	Arg	1963	only	-	Oct	 1	0:00	0	-
-Rule	Arg	1963	only	-	Dec	15	0:00	1:00	S
+Rule	Arg	1963	only	-	Dec	15	0:00	1:00	-
 Rule	Arg	1964	1966	-	Mar	 1	0:00	0	-
-Rule	Arg	1964	1966	-	Oct	15	0:00	1:00	S
+Rule	Arg	1964	1966	-	Oct	15	0:00	1:00	-
 Rule	Arg	1967	only	-	Apr	 2	0:00	0	-
-Rule	Arg	1967	1968	-	Oct	Sun>=1	0:00	1:00	S
+Rule	Arg	1967	1968	-	Oct	Sun>=1	0:00	1:00	-
 Rule	Arg	1968	1969	-	Apr	Sun>=1	0:00	0	-
-Rule	Arg	1974	only	-	Jan	23	0:00	1:00	S
+Rule	Arg	1974	only	-	Jan	23	0:00	1:00	-
 Rule	Arg	1974	only	-	May	 1	0:00	0	-
-Rule	Arg	1988	only	-	Dec	 1	0:00	1:00	S
+Rule	Arg	1988	only	-	Dec	 1	0:00	1:00	-
 #
 # From Hernan G. Otero (1995-06-26):
 # These corrections were contributed by InterSoft Argentina S.A.,
@@ -99,7 +99,7 @@
 # Talleres de Hidrografía Naval Argentina
 # (Argentine Naval Hydrography Institute)
 Rule	Arg	1989	1993	-	Mar	Sun>=1	0:00	0	-
-Rule	Arg	1989	1992	-	Oct	Sun>=15	0:00	1:00	S
+Rule	Arg	1989	1992	-	Oct	Sun>=15	0:00	1:00	-
 #
 # From Hernan G. Otero (1995-06-26):
 # From this moment on, the law that mandated the daylight saving
@@ -110,7 +110,7 @@
 # On October 3, 1999, 0:00 local, Argentina implemented daylight savings time,
 # which did not result in the switch of a time zone, as they stayed 9 hours
 # from the International Date Line.
-Rule	Arg	1999	only	-	Oct	Sun>=1	0:00	1:00	S
+Rule	Arg	1999	only	-	Oct	Sun>=1	0:00	1:00	-
 # From Paul Eggert (2007-12-28):
 # DST was set to expire on March 5, not March 3, but since it was converted
 # to standard time on March 3 it's more convenient for us to pretend that
@@ -213,9 +213,9 @@
 # la modificación del huso horario, ya que 2009 nos encuentra con
 # crecimiento en la producción y distribución energética."
 
-Rule	Arg	2007	only	-	Dec	30	0:00	1:00	S
+Rule	Arg	2007	only	-	Dec	30	0:00	1:00	-
 Rule	Arg	2008	2009	-	Mar	Sun>=15	0:00	0	-
-Rule	Arg	2008	only	-	Oct	Sun>=15	0:00	1:00	S
+Rule	Arg	2008	only	-	Oct	Sun>=15	0:00	1:00	-
 
 # From Mariano Absatz (2004-05-21):
 # Today it was officially published that the Province of Mendoza is changing
@@ -225,12 +225,14 @@
 # It's Law No. 7,210.  This change is due to a public power emergency, so for
 # now we'll assume it's for this year only.
 #
-# From Paul Eggert (2014-08-09):
+# From Paul Eggert (2018-01-31):
 # Hora de verano para la República Argentina
 # http://buenasiembra.com.ar/esoterismo/astrologia/hora-de-verano-de-la-republica-argentina-27.html
 # says that standard time in Argentina from 1894-10-31
 # to 1920-05-01 was -4:16:48.25.  Go with this more-precise value
-# over Shanks & Pottenger.
+# over Shanks & Pottenger.  It is upward compatible with Milne, who
+# says Córdoba time was -4:16:48.2.
+
 #
 # From Mariano Absatz (2004-06-05):
 # These media articles from a major newspaper mostly cover the current state:
@@ -404,9 +406,9 @@
 # rules...San Luis is still using "Western ARgentina Time" and it got
 # stuck on Summer daylight savings time even though the summer is over.
 
-# From Paul Eggert (2013-09-05):
+# From Paul Eggert (2018-01-23):
 # Perhaps San Luis operates on the legal fiction that it is at -04
-# with perpetual summer time, but ordinary usage typically seems to
+# with perpetual daylight saving time, but ordinary usage typically seems to
 # just say it's at -03; see, for example,
 # https://es.wikipedia.org/wiki/Hora_oficial_argentina
 # We've documented similar situations as being plain changes to
@@ -415,9 +417,6 @@
 # plus is that this silences a zic complaint that there's no POSIX TZ
 # setting for time stamps past 2038.
 
-# From Paul Eggert (2013-02-21):
-# Milne says Córdoba time was -4:16:48.2.  Round to the nearest second.
-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 #
 # Buenos Aires (BA), Capital Federal (CF),
@@ -552,7 +551,7 @@
 # San Luis (SL)
 
 Rule	SanLuis	2008	2009	-	Mar	Sun>=8	0:00	0	-
-Rule	SanLuis	2007	2008	-	Oct	Sun>=8	0:00	1:00	S
+Rule	SanLuis	2007	2008	-	Oct	Sun>=8	0:00	1:00	-
 
 Zone America/Argentina/San_Luis -4:25:24 - LMT	1894 Oct 31
 			-4:16:48 -	CMT	1920 May
@@ -794,14 +793,14 @@
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 # Decree 20,466 <http://pcdsh01.on.br/HV20466.htm> (1931-10-01)
 # Decree 21,896 <http://pcdsh01.on.br/HV21896.htm> (1932-01-10)
-Rule	Brazil	1931	only	-	Oct	 3	11:00	1:00	S
+Rule	Brazil	1931	only	-	Oct	 3	11:00	1:00	-
 Rule	Brazil	1932	1933	-	Apr	 1	 0:00	0	-
-Rule	Brazil	1932	only	-	Oct	 3	 0:00	1:00	S
+Rule	Brazil	1932	only	-	Oct	 3	 0:00	1:00	-
 # Decree 23,195 <http://pcdsh01.on.br/HV23195.htm> (1933-10-10)
 # revoked DST.
 # Decree 27,496 <http://pcdsh01.on.br/HV27496.htm> (1949-11-24)
 # Decree 27,998 <http://pcdsh01.on.br/HV27998.htm> (1950-04-13)
-Rule	Brazil	1949	1952	-	Dec	 1	 0:00	1:00	S
+Rule	Brazil	1949	1952	-	Dec	 1	 0:00	1:00	-
 Rule	Brazil	1950	only	-	Apr	16	 1:00	0	-
 Rule	Brazil	1951	1952	-	Apr	 1	 0:00	0	-
 # Decree 32,308 <http://pcdsh01.on.br/HV32308.htm> (1953-02-24)
@@ -813,51 +812,51 @@
 # in SP, RJ, GB, MG, ES, due to the prolongation of the drought.
 # Decree 53,071 <http://pcdsh01.on.br/HV53071.htm> (1963-12-03)
 # extended the above decree to all of the national territory on 12-09.
-Rule	Brazil	1963	only	-	Dec	 9	 0:00	1:00	S
+Rule	Brazil	1963	only	-	Dec	 9	 0:00	1:00	-
 # Decree 53,604 <http://pcdsh01.on.br/HV53604.htm> (1964-02-25)
 # extended summer time by one day to 1964-03-01 00:00 (start of school).
 Rule	Brazil	1964	only	-	Mar	 1	 0:00	0	-
 # Decree 55,639 <http://pcdsh01.on.br/HV55639.htm> (1965-01-27)
-Rule	Brazil	1965	only	-	Jan	31	 0:00	1:00	S
+Rule	Brazil	1965	only	-	Jan	31	 0:00	1:00	-
 Rule	Brazil	1965	only	-	Mar	31	 0:00	0	-
 # Decree 57,303 <http://pcdsh01.on.br/HV57303.htm> (1965-11-22)
-Rule	Brazil	1965	only	-	Dec	 1	 0:00	1:00	S
+Rule	Brazil	1965	only	-	Dec	 1	 0:00	1:00	-
 # Decree 57,843 <http://pcdsh01.on.br/HV57843.htm> (1966-02-18)
 Rule	Brazil	1966	1968	-	Mar	 1	 0:00	0	-
-Rule	Brazil	1966	1967	-	Nov	 1	 0:00	1:00	S
+Rule	Brazil	1966	1967	-	Nov	 1	 0:00	1:00	-
 # Decree 63,429 <http://pcdsh01.on.br/HV63429.htm> (1968-10-15)
 # revoked DST.
 # Decree 91,698 <http://pcdsh01.on.br/HV91698.htm> (1985-09-27)
-Rule	Brazil	1985	only	-	Nov	 2	 0:00	1:00	S
+Rule	Brazil	1985	only	-	Nov	 2	 0:00	1:00	-
 # Decree 92,310 (1986-01-21)
 # Decree 92,463 (1986-03-13)
 Rule	Brazil	1986	only	-	Mar	15	 0:00	0	-
 # Decree 93,316 (1986-10-01)
-Rule	Brazil	1986	only	-	Oct	25	 0:00	1:00	S
+Rule	Brazil	1986	only	-	Oct	25	 0:00	1:00	-
 Rule	Brazil	1987	only	-	Feb	14	 0:00	0	-
 # Decree 94,922 <http://pcdsh01.on.br/HV94922.htm> (1987-09-22)
-Rule	Brazil	1987	only	-	Oct	25	 0:00	1:00	S
+Rule	Brazil	1987	only	-	Oct	25	 0:00	1:00	-
 Rule	Brazil	1988	only	-	Feb	 7	 0:00	0	-
 # Decree 96,676 <http://pcdsh01.on.br/HV96676.htm> (1988-09-12)
 # except for the states of AC, AM, PA, RR, RO, and AP (then a territory)
-Rule	Brazil	1988	only	-	Oct	16	 0:00	1:00	S
+Rule	Brazil	1988	only	-	Oct	16	 0:00	1:00	-
 Rule	Brazil	1989	only	-	Jan	29	 0:00	0	-
 # Decree 98,077 <http://pcdsh01.on.br/HV98077.htm> (1989-08-21)
 # with the same exceptions
-Rule	Brazil	1989	only	-	Oct	15	 0:00	1:00	S
+Rule	Brazil	1989	only	-	Oct	15	 0:00	1:00	-
 Rule	Brazil	1990	only	-	Feb	11	 0:00	0	-
 # Decree 99,530 <http://pcdsh01.on.br/HV99530.htm> (1990-09-17)
 # adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF.
 # Decree 99,629 (1990-10-19) adds BA, MT.
-Rule	Brazil	1990	only	-	Oct	21	 0:00	1:00	S
+Rule	Brazil	1990	only	-	Oct	21	 0:00	1:00	-
 Rule	Brazil	1991	only	-	Feb	17	 0:00	0	-
 # Unnumbered decree <http://pcdsh01.on.br/HV1991.htm> (1991-09-25)
 # adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF.
-Rule	Brazil	1991	only	-	Oct	20	 0:00	1:00	S
+Rule	Brazil	1991	only	-	Oct	20	 0:00	1:00	-
 Rule	Brazil	1992	only	-	Feb	 9	 0:00	0	-
 # Unnumbered decree <http://pcdsh01.on.br/HV1992.htm> (1992-10-16)
 # adopted by same states.
-Rule	Brazil	1992	only	-	Oct	25	 0:00	1:00	S
+Rule	Brazil	1992	only	-	Oct	25	 0:00	1:00	-
 Rule	Brazil	1993	only	-	Jan	31	 0:00	0	-
 # Decree 942 <http://pcdsh01.on.br/HV942.htm> (1993-09-28)
 # adopted by same states, plus AM.
@@ -867,12 +866,12 @@
 # adopted by same states, plus MT and TO.
 # Decree 1,674 <http://pcdsh01.on.br/HV1674.htm> (1995-10-13)
 # adds AL, SE.
-Rule	Brazil	1993	1995	-	Oct	Sun>=11	 0:00	1:00	S
+Rule	Brazil	1993	1995	-	Oct	Sun>=11	 0:00	1:00	-
 Rule	Brazil	1994	1995	-	Feb	Sun>=15	 0:00	0	-
 Rule	Brazil	1996	only	-	Feb	11	 0:00	0	-
 # Decree 2,000 <http://pcdsh01.on.br/HV2000.htm> (1996-09-04)
 # adopted by same states, minus AL, SE.
-Rule	Brazil	1996	only	-	Oct	 6	 0:00	1:00	S
+Rule	Brazil	1996	only	-	Oct	 6	 0:00	1:00	-
 Rule	Brazil	1997	only	-	Feb	16	 0:00	0	-
 # From Daniel C. Sobral (1998-02-12):
 # In 1997, the DS began on October 6. The stated reason was that
@@ -882,19 +881,19 @@
 # to help dealing with the shortages of electric power.
 #
 # Decree 2,317 (1997-09-04), adopted by same states.
-Rule	Brazil	1997	only	-	Oct	 6	 0:00	1:00	S
+Rule	Brazil	1997	only	-	Oct	 6	 0:00	1:00	-
 # Decree 2,495 <http://pcdsh01.on.br/figuras/HV2495.JPG>
 # (1998-02-10)
 Rule	Brazil	1998	only	-	Mar	 1	 0:00	0	-
 # Decree 2,780 <http://pcdsh01.on.br/figuras/Hv98.jpg> (1998-09-11)
 # adopted by the same states as before.
-Rule	Brazil	1998	only	-	Oct	11	 0:00	1:00	S
+Rule	Brazil	1998	only	-	Oct	11	 0:00	1:00	-
 Rule	Brazil	1999	only	-	Feb	21	 0:00	0	-
 # Decree 3,150 <http://pcdsh01.on.br/figuras/HV3150.gif>
 # (1999-08-23) adopted by same states.
 # Decree 3,188 <http://pcdsh01.on.br/DecHV99.gif> (1999-09-30)
 # adds SE, AL, PB, PE, RN, CE, PI, MA and RR.
-Rule	Brazil	1999	only	-	Oct	 3	 0:00	1:00	S
+Rule	Brazil	1999	only	-	Oct	 3	 0:00	1:00	-
 Rule	Brazil	2000	only	-	Feb	27	 0:00	0	-
 # Decree 3,592 <http://pcdsh01.on.br/DEC3592.htm> (2000-09-06)
 # adopted by the same states as before.
@@ -904,34 +903,34 @@
 # repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00.
 # Decree 3,916 <http://pcdsh01.on.br/figuras/HV3916.gif>
 # (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE.
-Rule	Brazil	2000	2001	-	Oct	Sun>=8	 0:00	1:00	S
+Rule	Brazil	2000	2001	-	Oct	Sun>=8	 0:00	1:00	-
 Rule	Brazil	2001	2006	-	Feb	Sun>=15	 0:00	0	-
 # Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE.
 # 4,399 <http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm>
-Rule	Brazil	2002	only	-	Nov	 3	 0:00	1:00	S
+Rule	Brazil	2002	only	-	Nov	 3	 0:00	1:00	-
 # Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO.
 # 4,844 <http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm>
-Rule	Brazil	2003	only	-	Oct	19	 0:00	1:00	S
+Rule	Brazil	2003	only	-	Oct	19	 0:00	1:00	-
 # Decree 5,223 (2004-10-01) reestablishes DST in MT.
 # 5,223 <http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm>
-Rule	Brazil	2004	only	-	Nov	 2	 0:00	1:00	S
+Rule	Brazil	2004	only	-	Nov	 2	 0:00	1:00	-
 # Decree 5,539 <http://pcdsh01.on.br/DecHV5539.gif> (2005-09-19),
 # adopted by the same states as before.
-Rule	Brazil	2005	only	-	Oct	16	 0:00	1:00	S
+Rule	Brazil	2005	only	-	Oct	16	 0:00	1:00	-
 # Decree 5,920 <http://pcdsh01.on.br/DecHV5920.gif> (2006-10-03),
 # adopted by the same states as before.
-Rule	Brazil	2006	only	-	Nov	 5	 0:00	1:00	S
+Rule	Brazil	2006	only	-	Nov	 5	 0:00	1:00	-
 Rule	Brazil	2007	only	-	Feb	25	 0:00	0	-
 # Decree 6,212 <http://pcdsh01.on.br/DecHV6212.gif> (2007-09-26),
 # adopted by the same states as before.
-Rule	Brazil	2007	only	-	Oct	Sun>=8	 0:00	1:00	S
+Rule	Brazil	2007	only	-	Oct	Sun>=8	 0:00	1:00	-
 # From Frederico A. C. Neves (2008-09-10):
 # According to this decree
 # http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm
 # [t]he DST period in Brazil now on will be from the 3rd Oct Sunday to the
 # 3rd Feb Sunday. There is an exception on the return date when this is
 # the Carnival Sunday then the return date will be the next Sunday...
-Rule	Brazil	2008	2017	-	Oct	Sun>=15	0:00	1:00	S
+Rule	Brazil	2008	2017	-	Oct	Sun>=15	0:00	1:00	-
 Rule	Brazil	2008	2011	-	Feb	Sun>=15	0:00	0	-
 # Decree 7,584 <http://pcdsh01.on.br/HVdecreto7584_20111013.jpg> (2011-10-13)
 # added Bahia.
@@ -949,7 +948,7 @@
 # ... https://www.timeanddate.com/news/time/brazil-delays-dst-2018.html
 # From Steffen Thorsen (2017-12-20):
 # http://www.planalto.gov.br/ccivil_03/_ato2015-2018/2017/decreto/D9242.htm
-Rule	Brazil	2018	max	-	Nov	Sun>=1	0:00	1:00	S
+Rule	Brazil	2018	max	-	Nov	Sun>=1	0:00	1:00	-
 Rule	Brazil	2023	only	-	Feb	Sun>=22	0:00	0	-
 Rule	Brazil	2024	2025	-	Feb	Sun>=15	0:00	0	-
 Rule	Brazil	2026	only	-	Feb	Sun>=22	0:00	0	-
@@ -1256,28 +1255,28 @@
 # For now, assume that they will not revert.
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	Chile	1927	1931	-	Sep	 1	0:00	1:00	S
+Rule	Chile	1927	1931	-	Sep	 1	0:00	1:00	-
 Rule	Chile	1928	1932	-	Apr	 1	0:00	0	-
-Rule	Chile	1968	only	-	Nov	 3	4:00u	1:00	S
+Rule	Chile	1968	only	-	Nov	 3	4:00u	1:00	-
 Rule	Chile	1969	only	-	Mar	30	3:00u	0	-
-Rule	Chile	1969	only	-	Nov	23	4:00u	1:00	S
+Rule	Chile	1969	only	-	Nov	23	4:00u	1:00	-
 Rule	Chile	1970	only	-	Mar	29	3:00u	0	-
 Rule	Chile	1971	only	-	Mar	14	3:00u	0	-
-Rule	Chile	1970	1972	-	Oct	Sun>=9	4:00u	1:00	S
+Rule	Chile	1970	1972	-	Oct	Sun>=9	4:00u	1:00	-
 Rule	Chile	1972	1986	-	Mar	Sun>=9	3:00u	0	-
-Rule	Chile	1973	only	-	Sep	30	4:00u	1:00	S
-Rule	Chile	1974	1987	-	Oct	Sun>=9	4:00u	1:00	S
+Rule	Chile	1973	only	-	Sep	30	4:00u	1:00	-
+Rule	Chile	1974	1987	-	Oct	Sun>=9	4:00u	1:00	-
 Rule	Chile	1987	only	-	Apr	12	3:00u	0	-
 Rule	Chile	1988	1990	-	Mar	Sun>=9	3:00u	0	-
-Rule	Chile	1988	1989	-	Oct	Sun>=9	4:00u	1:00	S
-Rule	Chile	1990	only	-	Sep	16	4:00u	1:00	S
+Rule	Chile	1988	1989	-	Oct	Sun>=9	4:00u	1:00	-
+Rule	Chile	1990	only	-	Sep	16	4:00u	1:00	-
 Rule	Chile	1991	1996	-	Mar	Sun>=9	3:00u	0	-
-Rule	Chile	1991	1997	-	Oct	Sun>=9	4:00u	1:00	S
+Rule	Chile	1991	1997	-	Oct	Sun>=9	4:00u	1:00	-
 Rule	Chile	1997	only	-	Mar	30	3:00u	0	-
 Rule	Chile	1998	only	-	Mar	Sun>=9	3:00u	0	-
-Rule	Chile	1998	only	-	Sep	27	4:00u	1:00	S
+Rule	Chile	1998	only	-	Sep	27	4:00u	1:00	-
 Rule	Chile	1999	only	-	Apr	 4	3:00u	0	-
-Rule	Chile	1999	2010	-	Oct	Sun>=9	4:00u	1:00	S
+Rule	Chile	1999	2010	-	Oct	Sun>=9	4:00u	1:00	-
 Rule	Chile	2000	2007	-	Mar	Sun>=9	3:00u	0	-
 # N.B.: the end of March 29 in Chile is March 30 in Universal time,
 # which is used below in specifying the transition.
@@ -1285,11 +1284,11 @@
 Rule	Chile	2009	only	-	Mar	Sun>=9	3:00u	0	-
 Rule	Chile	2010	only	-	Apr	Sun>=1	3:00u	0	-
 Rule	Chile	2011	only	-	May	Sun>=2	3:00u	0	-
-Rule	Chile	2011	only	-	Aug	Sun>=16	4:00u	1:00	S
+Rule	Chile	2011	only	-	Aug	Sun>=16	4:00u	1:00	-
 Rule	Chile	2012	2014	-	Apr	Sun>=23	3:00u	0	-
-Rule	Chile	2012	2014	-	Sep	Sun>=2	4:00u	1:00	S
+Rule	Chile	2012	2014	-	Sep	Sun>=2	4:00u	1:00	-
 Rule	Chile	2016	max	-	May	Sun>=9	3:00u	0	-
-Rule	Chile	2016	max	-	Aug	Sun>=9	4:00u	1:00	S
+Rule	Chile	2016	max	-	Aug	Sun>=9	4:00u	1:00	-
 # IATA SSIM anomalies: (1992-02) says 1992-03-14;
 # (1996-09) says 1998-03-08.  Ignore these.
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
@@ -1354,7 +1353,7 @@
 # "A variation of fifteen minutes in the public clocks of Bogota is not rare."
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	CO	1992	only	-	May	 3	0:00	1:00	S
+Rule	CO	1992	only	-	May	 3	0:00	1:00	-
 Rule	CO	1993	only	-	Apr	 4	0:00	0	-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	America/Bogota	-4:56:16 -	LMT	1884 Mar 13
@@ -1414,7 +1413,7 @@
 # repeated.  For now, assume transitions were at 00:00 local time country-wide.
 #
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	Ecuador	1992	only	-	Nov	28	0:00	1:00	S
+Rule	Ecuador	1992	only	-	Nov	28	0:00	1:00	-
 Rule	Ecuador	1993	only	-	Feb	 5	0:00	0	-
 #
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
@@ -1504,22 +1503,22 @@
 #   the maintainers of the database to inform them we're adopting
 #   the same policy this year and suggest recommendations for future years.
 #
-# For now we will assume permanent summer time for the Falklands
+# For now we will assume permanent -03 for the Falklands
 # until advised differently (to apply for 2012 and beyond, after the 2011
 # experiment was apparently successful.)
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	Falk	1937	1938	-	Sep	lastSun	0:00	1:00	S
+Rule	Falk	1937	1938	-	Sep	lastSun	0:00	1:00	-
 Rule	Falk	1938	1942	-	Mar	Sun>=19	0:00	0	-
-Rule	Falk	1939	only	-	Oct	1	0:00	1:00	S
-Rule	Falk	1940	1942	-	Sep	lastSun	0:00	1:00	S
+Rule	Falk	1939	only	-	Oct	1	0:00	1:00	-
+Rule	Falk	1940	1942	-	Sep	lastSun	0:00	1:00	-
 Rule	Falk	1943	only	-	Jan	1	0:00	0	-
-Rule	Falk	1983	only	-	Sep	lastSun	0:00	1:00	S
+Rule	Falk	1983	only	-	Sep	lastSun	0:00	1:00	-
 Rule	Falk	1984	1985	-	Apr	lastSun	0:00	0	-
-Rule	Falk	1984	only	-	Sep	16	0:00	1:00	S
-Rule	Falk	1985	2000	-	Sep	Sun>=9	0:00	1:00	S
+Rule	Falk	1984	only	-	Sep	16	0:00	1:00	-
+Rule	Falk	1985	2000	-	Sep	Sun>=9	0:00	1:00	-
 Rule	Falk	1986	2000	-	Apr	Sun>=16	0:00	0	-
 Rule	Falk	2001	2010	-	Apr	Sun>=15	2:00	0	-
-Rule	Falk	2001	2010	-	Sep	Sun>=1	2:00	1:00	S
+Rule	Falk	2001	2010	-	Sep	Sun>=1	2:00	1:00	-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone Atlantic/Stanley	-3:51:24 -	LMT	1890
 			-3:51:24 -	SMT	1912 Mar 12 # Stanley Mean Time
@@ -1554,16 +1553,16 @@
 # adjust their clocks at 0 hour of the given dates.
 #
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	Para	1975	1988	-	Oct	 1	0:00	1:00	S
+Rule	Para	1975	1988	-	Oct	 1	0:00	1:00	-
 Rule	Para	1975	1978	-	Mar	 1	0:00	0	-
 Rule	Para	1979	1991	-	Apr	 1	0:00	0	-
-Rule	Para	1989	only	-	Oct	22	0:00	1:00	S
-Rule	Para	1990	only	-	Oct	 1	0:00	1:00	S
-Rule	Para	1991	only	-	Oct	 6	0:00	1:00	S
+Rule	Para	1989	only	-	Oct	22	0:00	1:00	-
+Rule	Para	1990	only	-	Oct	 1	0:00	1:00	-
+Rule	Para	1991	only	-	Oct	 6	0:00	1:00	-
 Rule	Para	1992	only	-	Mar	 1	0:00	0	-
-Rule	Para	1992	only	-	Oct	 5	0:00	1:00	S
+Rule	Para	1992	only	-	Oct	 5	0:00	1:00	-
 Rule	Para	1993	only	-	Mar	31	0:00	0	-
-Rule	Para	1993	1995	-	Oct	 1	0:00	1:00	S
+Rule	Para	1993	1995	-	Oct	 1	0:00	1:00	-
 Rule	Para	1994	1995	-	Feb	lastSun	0:00	0	-
 Rule	Para	1996	only	-	Mar	 1	0:00	0	-
 # IATA SSIM (2000-02) says 1999-10-10; ignore this for now.
@@ -1581,7 +1580,7 @@
 # year, the time will change on the first Sunday of October; likewise, the
 # clock will be set back on the first Sunday of March.
 #
-Rule	Para	1996	2001	-	Oct	Sun>=1	0:00	1:00	S
+Rule	Para	1996	2001	-	Oct	Sun>=1	0:00	1:00	-
 # IATA SSIM (1997-09) says Mar 1; go with Shanks & Pottenger.
 Rule	Para	1997	only	-	Feb	lastSun	0:00	0	-
 # Shanks & Pottenger say 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but
@@ -1592,7 +1591,7 @@
 # dst method to be from the first Sunday in September to the first Sunday in
 # April.
 Rule	Para	2002	2004	-	Apr	Sun>=1	0:00	0	-
-Rule	Para	2002	2003	-	Sep	Sun>=1	0:00	1:00	S
+Rule	Para	2002	2003	-	Sep	Sun>=1	0:00	1:00	-
 #
 # From Jesper Nørgaard Welen (2005-01-02):
 # There are several sources that claim that Paraguay made
@@ -1601,7 +1600,7 @@
 # Decree 1,867 (2004-03-05)
 # From Carlos Raúl Perasso via Jesper Nørgaard Welen (2006-10-13)
 # http://www.presidencia.gov.py/decretos/D1867.pdf
-Rule	Para	2004	2009	-	Oct	Sun>=15	0:00	1:00	S
+Rule	Para	2004	2009	-	Oct	Sun>=15	0:00	1:00	-
 Rule	Para	2005	2009	-	Mar	Sun>=8	0:00	0	-
 # From Carlos Raúl Perasso (2010-02-18):
 # By decree number 3958 issued yesterday
@@ -1614,7 +1613,7 @@
 # and that on the first Sunday of the month of October, it is to be set
 # forward 60 minutes, in all the territory of the Paraguayan Republic.
 # ...
-Rule	Para	2010	max	-	Oct	Sun>=1	0:00	1:00	S
+Rule	Para	2010	max	-	Oct	Sun>=1	0:00	1:00	-
 Rule	Para	2010	2012	-	Apr	Sun>=8	0:00	0	-
 #
 # From Steffen Thorsen (2013-03-07):
@@ -1647,16 +1646,16 @@
 # Shanks & Pottenger don't have this transition.  Assume 1986 was like 1987.
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	Peru	1938	only	-	Jan	 1	0:00	1:00	S
+Rule	Peru	1938	only	-	Jan	 1	0:00	1:00	-
 Rule	Peru	1938	only	-	Apr	 1	0:00	0	-
-Rule	Peru	1938	1939	-	Sep	lastSun	0:00	1:00	S
+Rule	Peru	1938	1939	-	Sep	lastSun	0:00	1:00	-
 Rule	Peru	1939	1940	-	Mar	Sun>=24	0:00	0	-
-Rule	Peru	1986	1987	-	Jan	 1	0:00	1:00	S
+Rule	Peru	1986	1987	-	Jan	 1	0:00	1:00	-
 Rule	Peru	1986	1987	-	Apr	 1	0:00	0	-
-Rule	Peru	1990	only	-	Jan	 1	0:00	1:00	S
+Rule	Peru	1990	only	-	Jan	 1	0:00	1:00	-
 Rule	Peru	1990	only	-	Apr	 1	0:00	0	-
 # IATA is ambiguous for 1993/1995; go with Shanks & Pottenger.
-Rule	Peru	1994	only	-	Jan	 1	0:00	1:00	S
+Rule	Peru	1994	only	-	Jan	 1	0:00	1:00	-
 Rule	Peru	1994	only	-	Apr	 1	0:00	0	-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	America/Lima	-5:08:12 -	LMT	1890
@@ -1702,72 +1701,201 @@
 # Uruguay
 # From Paul Eggert (1993-11-18):
 # Uruguay wins the prize for the strangest peacetime manipulation of the rules.
-# From Shanks & Pottenger:
+#
+# From Tim Parenti (2018-02-20), per Jeremie Bonjour (2018-01-31) and Michael
+# Deckers (2018-02-20):
+# ... At least they kept good records...
+#
+# http://www.armada.mil.uy/ContenidosPDFs/sohma/web/almanaque/almanaque_2018.pdf#page=36
+# Page 36 of Almanaque 2018, published by the Oceanography, Hydrography, and
+# Meteorology Service of the Uruguayan Navy, seems to give many transitions
+# with greater clarity than we've had before.  It directly references many laws
+# and decrees which are, in turn, referenced below.  They can be viewed in the
+# public archives of the Diario Oficial (in Spanish) at
+# http://www.impo.com.uy/diariooficial/
+#
+# Ley No. 3920 of 1908-06-10 placed the determination of legal time under the
+# auspices of the National Institute for the Prediction of Time.  It is unclear
+# exactly what offset was used during this period, though Ley No. 7200 of
+# 1920-04-23 used the Observatory of the National Meteorological Institute in
+# Montevideo (34° 54' 33" S, 56° 12' 45" W) as its reference meridian,
+# retarding legal time by 15 minutes 9 seconds from 1920-04-30 24:00,
+# resulting in UT-04.  Assume the corresponding LMT of UT-03:44:51 (given on
+# page 725 of the Proceedings of the Second Pan-American Scientific Congress,
+# 1915-1916) was in use, and merely became official from 1908-06-10.
+# https://www.impo.com.uy/diariooficial/1908/06/18/12
+# https://www.impo.com.uy/diariooficial/1920/04/27/9
+#
+# Ley No. 7594 of 1923-06-28 specified legal time as Observatory time advanced
+# by 44 minutes 51 seconds (UT-03) "from 30 September to 31 March", and by 14
+# minutes 51 seconds (UT-03:30) "the rest of the year"; a message from the
+# National Council of Administration the same day, published directly below the
+# law in the Diario Oficial, specified the first transition to be 1923-09-30
+# 24:00.  This effectively established standard time at UT-03:30 with 30
+# minutes DST.  Assume transitions at 24:00 on the specified days until Ley No.
+# 7919 of 1926-03-05 ended this arrangement, repealing all "laws and other
+# provisions which oppose" it, resulting in year-round UT-03:30; a Resolución
+# of 1926-03-11 puts the final transition at 1926-03-31 24:00, the same as it
+# would have been under the previous law.
+# https://www.impo.com.uy/diariooficial/1923/07/02/2
+# https://www.impo.com.uy/diariooficial/1926/03/10/2
+# https://www.impo.com.uy/diariooficial/1926/03/18/2
+#
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-# Whitman gives 1923 Oct 1; go with Shanks & Pottenger.
-Rule	Uruguay	1923	only	-	Oct	 2	 0:00	0:30	HS
+Rule	Uruguay	1923	1925	-	Oct	 1	 0:00	0:30	-
 Rule	Uruguay	1924	1926	-	Apr	 1	 0:00	0	-
-Rule	Uruguay	1924	1925	-	Oct	 1	 0:00	0:30	HS
-Rule	Uruguay	1933	1935	-	Oct	lastSun	 0:00	0:30	HS
-# Shanks & Pottenger give 1935 Apr 1 0:00 & 1936 Mar 30 0:00; go with Whitman.
-Rule	Uruguay	1934	1936	-	Mar	Sat>=25	23:30s	0	-
-Rule	Uruguay	1936	only	-	Nov	 1	 0:00	0:30	HS
-Rule	Uruguay	1937	1941	-	Mar	lastSun	 0:00	0	-
-# Whitman gives 1937 Oct 3; go with Shanks & Pottenger.
-Rule	Uruguay	1937	1940	-	Oct	lastSun	 0:00	0:30	HS
-# Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13,
-# and 1943 Apr 13 "to present time"; go with Shanks & Pottenger.
-Rule	Uruguay	1941	only	-	Aug	 1	 0:00	0:30	HS
-Rule	Uruguay	1942	only	-	Jan	 1	 0:00	0	-
-Rule	Uruguay	1942	only	-	Dec	14	 0:00	1:00	S
+# From Tim Parenti (2018-02-15):
+# http://www.impo.com.uy/diariooficial/1933/10/27/6
+#
+# It appears Ley No. 9122 of 1933 was never published as such in the Diario
+# Oficial, but instead appeared as Document 26 in the Diario on Friday
+# 1933-10-27 as a decree made Monday 1933-10-23 and filed under the Ministry of
+# National Defense.  It reinstituted a DST of 30 minutes (to UT-03) "from the
+# last Sunday of October...until the last Saturday of March."  In accordance
+# with this provision, the first transition was explicitly specified in Article
+# 2 of the decree as Saturday 1933-10-28 at 24:00; that is, Sunday 1933-10-29
+# at 00:00.  Assume transitions at 00:00 Sunday throughout.
+#
+# Departing from the matter-of-fact nature of previous timekeeping laws, the
+# 1933 decree "consider[s] the advantages of...the advance of legal time":
+#
+#   "Whereas: The measure adopted by almost all nations at the time of the last
+#    World War still persists in North America and Europe, precisely because of
+#    the economic, hygienic, and social advantages derived from such an
+#    emergency measure...
+#
+#    Whereas: The advance of the legal time during the summer seasons, by
+#    displacing social activity near sunrise, favors the citizen populations
+#    and especially the society that creates and works..."
+#
+# It further specified that "necessary measures" be taken to ensure that
+# "public spectacles finish, in general, before [01:00]."
+Rule	Uruguay	1933	1938	-	Oct	lastSun	 0:00	0:30	-
+Rule	Uruguay	1934	1941	-	Mar	lastSat	24:00	0	-
+# From Tim Parenti (2018-02-15):
+# Most of the Rules below, and their contemporaneous Zone lines, have been
+# updated simply to match the Almanaque 2018.  Although the document does not
+# list exact transition times, midnight transitions were already present in our
+# data here for all transitions through 2004-09, and this is both consistent
+# with prior transitions and verified in several decrees marked below between
+# 1939-09 and 2004-09, wherein the relevant text was typically of the form:
+#
+#   "From 0 hours on [date], the legal time of the entire Republic will be...
+#
+#    In accordance with [the preceding], on [previous date] at 24 hours, all
+#    clocks throughout the Republic will be [advanced/retarded] by..."
+#
+# It is possible that there is greater specificity to be found for the Rules
+# below, but it is buried in no fewer than 40 different decrees individually
+# referenced by the Almanaque for the period from 1939-09 to 2014-09.
+# Four-fifths of these were promulgated less than two weeks before taking
+# effect; more than half within a week and none more than 5 weeks.  Only the
+# handful with comments below have been checked with any thoroughness.
+Rule	Uruguay	1939	only	-	Oct	 1	 0:00	0:30	-
+Rule	Uruguay	1940	only	-	Oct	27	 0:00	0:30	-
+# From Tim Parenti (2018-02-15):
+# Decreto 1145 of the Ministry of National Defense, dated 1941-07-26, specified
+# UT-03 from Friday 1941-08-01 00:00, citing an "urgent...need to save fuel".
+# http://www.impo.com.uy/diariooficial/1941/08/04/1
+Rule	Uruguay	1941	only	-	Aug	 1	 0:00	0:30	-
+# From Tim Parenti (2018-02-15):
+# Decreto 1866 of the Ministry of National Defense, dated 1942-12-09, specified
+# further advancement (to UT-02:30) from Sunday 1942-12-13 24:00.  Since clocks
+# never went back to UT-03:30 thereafter, this is modeled as advancing standard
+# time by 30 minutes to UT-03, while retaining 30 minutes of DST.
+# http://www.impo.com.uy/diariooficial/1942/12/16/3
+Rule	Uruguay	1942	only	-	Dec	14	 0:00	0:30	-
 Rule	Uruguay	1943	only	-	Mar	14	 0:00	0	-
-Rule	Uruguay	1959	only	-	May	24	 0:00	1:00	S
+Rule	Uruguay	1959	only	-	May	24	 0:00	0:30	-
 Rule	Uruguay	1959	only	-	Nov	15	 0:00	0	-
-Rule	Uruguay	1960	only	-	Jan	17	 0:00	1:00	S
+Rule	Uruguay	1960	only	-	Jan	17	 0:00	1:00	-
 Rule	Uruguay	1960	only	-	Mar	 6	 0:00	0	-
-Rule	Uruguay	1965	1967	-	Apr	Sun>=1	 0:00	1:00	S
+Rule	Uruguay	1965	only	-	Apr	 4	 0:00	1:00	-
 Rule	Uruguay	1965	only	-	Sep	26	 0:00	0	-
-Rule	Uruguay	1966	1967	-	Oct	31	 0:00	0	-
-Rule	Uruguay	1968	1970	-	May	27	 0:00	0:30	HS
-Rule	Uruguay	1968	1970	-	Dec	 2	 0:00	0	-
-Rule	Uruguay	1972	only	-	Apr	24	 0:00	1:00	S
-Rule	Uruguay	1972	only	-	Aug	15	 0:00	0	-
-Rule	Uruguay	1974	only	-	Mar	10	 0:00	0:30	HS
-Rule	Uruguay	1974	only	-	Dec	22	 0:00	1:00	S
-Rule	Uruguay	1976	only	-	Oct	 1	 0:00	0	-
-Rule	Uruguay	1977	only	-	Dec	 4	 0:00	1:00	S
-Rule	Uruguay	1978	only	-	Apr	 1	 0:00	0	-
-Rule	Uruguay	1979	only	-	Oct	 1	 0:00	1:00	S
-Rule	Uruguay	1980	only	-	May	 1	 0:00	0	-
-Rule	Uruguay	1987	only	-	Dec	14	 0:00	1:00	S
-Rule	Uruguay	1988	only	-	Mar	14	 0:00	0	-
-Rule	Uruguay	1988	only	-	Dec	11	 0:00	1:00	S
-Rule	Uruguay	1989	only	-	Mar	12	 0:00	0	-
-Rule	Uruguay	1989	only	-	Oct	29	 0:00	1:00	S
-# Shanks & Pottenger say no DST was observed in 1990/1 and 1991/2,
-# and that 1992/3's DST was from 10-25 to 03-01.  Go with IATA.
-Rule	Uruguay	1990	1992	-	Mar	Sun>=1	 0:00	0	-
-Rule	Uruguay	1990	1991	-	Oct	Sun>=21	 0:00	1:00	S
-Rule	Uruguay	1992	only	-	Oct	18	 0:00	1:00	S
+# From Tim Parenti (2018-02-15):
+# Decreto 321/968 of 1968-05-25, citing emergency drought measures decreed the
+# day before, brought clocks forward 30 minutes from Monday 1968-05-27 00:00.
+# http://www.impo.com.uy/diariooficial/1968/05/30/5
+Rule	Uruguay	1968	only	-	May	27	 0:00	0:30	-
+Rule	Uruguay	1968	only	-	Dec	 1	 0:00	0	-
+# From Tim Parenti (2018-02-15):
+# Decreto 188/970 of 1970-04-23 instituted restrictions on electricity
+# consumption "as a consequence of the current rainfall regime in the country".
+# Articles 13 and 14 advanced clocks by an hour from Saturday 1970-04-25 00:00.
+# http://www.impo.com.uy/diariooficial/1970/04/29/4
+Rule	Uruguay	1970	only	-	Apr	25	 0:00	1:00	-
+Rule	Uruguay	1970	only	-	Jun	14	 0:00	0	-
+Rule	Uruguay	1972	only	-	Apr	23	 0:00	1:00	-
+Rule	Uruguay	1972	only	-	Jul	16	 0:00	0	-
+# From Tim Parenti (2018-02-15):
+# Decreto 29/974 of 1974-01-11, citing "the international rise in the price of
+# oil", advanced clocks by 90 minutes (to UT-01:30).  Decreto 163/974 of
+# 1974-03-04 returned 60 of those minutes (to UT-02:30), and the remaining 30
+# minutes followed in Decreto 679/974 of 1974-08-29.
+# http://www.impo.com.uy/diariooficial/1974/01/22/11
+# http://www.impo.com.uy/diariooficial/1974/03/14/3
+# http://www.impo.com.uy/diariooficial/1974/09/04/6
+Rule	Uruguay	1974	only	-	Jan	13	 0:00	1:30	-
+Rule	Uruguay	1974	only	-	Mar	10	 0:00	0:30	-
+Rule	Uruguay	1974	only	-	Sep	 1	 0:00	0	-
+Rule	Uruguay	1974	only	-	Dec	22	 0:00	1:00	-
+Rule	Uruguay	1975	only	-	Mar	30	 0:00	0	-
+Rule	Uruguay	1976	only	-	Dec	19	 0:00	1:00	-
+Rule	Uruguay	1977	only	-	Mar	 6	 0:00	0	-
+Rule	Uruguay	1977	only	-	Dec	 4	 0:00	1:00	-
+Rule	Uruguay	1978	1979	-	Mar	Sun>=1	 0:00	0	-
+Rule	Uruguay	1978	only	-	Dec	17	 0:00	1:00	-
+Rule	Uruguay	1979	only	-	Apr	29	 0:00	1:00	-
+Rule	Uruguay	1980	only	-	Mar	16	 0:00	0	-
+# From Tim Parenti (2018-02-15):
+# Decreto 725/987 of 1987-12-04 cited "better use of national tourist
+# attractions" to advance clocks one hour from Monday 1987-12-14 00:00.
+# http://www.impo.com.uy/diariooficial/1988/01/25/1
+Rule	Uruguay	1987	only	-	Dec	14	 0:00	1:00	-
+Rule	Uruguay	1988	only	-	Feb	28	 0:00	0	-
+Rule	Uruguay	1988	only	-	Dec	11	 0:00	1:00	-
+Rule	Uruguay	1989	only	-	Mar	 5	 0:00	0	-
+Rule	Uruguay	1989	only	-	Oct	29	 0:00	1:00	-
+Rule	Uruguay	1990	only	-	Feb	25	 0:00	0	-
+# From Tim Parenti (2018-02-15), per Paul Eggert (1999-11-04):
+# IATA agrees as below for 1990-10 through 1993-02.  Per Almanaque 2018, the
+# 1992/1993 season appears to be the first in over half a century where DST
+# both began and ended pursuant to the same decree.
+Rule	Uruguay	1990	1991	-	Oct	Sun>=21	 0:00	1:00	-
+Rule	Uruguay	1991	1992	-	Mar	Sun>=1	 0:00	0	-
+Rule	Uruguay	1992	only	-	Oct	18	 0:00	1:00	-
 Rule	Uruguay	1993	only	-	Feb	28	 0:00	0	-
 # From Eduardo Cota (2004-09-20):
 # The Uruguayan government has decreed a change in the local time....
-# http://www.presidencia.gub.uy/decretos/2004091502.htm
-Rule	Uruguay	2004	only	-	Sep	19	 0:00	1:00	S
+# From Tim Parenti (2018-02-15):
+# Decreto 328/004 of 2004-09-15.
+# http://www.impo.com.uy/diariooficial/2004/09/23/documentos.pdf#page=1
+Rule	Uruguay	2004	only	-	Sep	19	 0:00	1:00	-
 # From Steffen Thorsen (2005-03-11):
 # Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to
 # save energy ... it was postponed two weeks....
-# http://www.presidencia.gub.uy/_Web/noticias/2005/03/2005031005.htm
+# From Tim Parenti (2018-02-15):
+# This 2005 postponement is not in Almanaque 2018.  Go with the contemporaneous
+# reporting, which is confirmed by Decreto 107/005 of 2005-03-10 amending
+# Decreto 328/004:
+# http://www.impo.com.uy/diariooficial/2005/03/15/documentos.pdf#page=1
+# The original decree specified a transition of 2005-03-12 24:00, but the new
+# one specified 2005-03-27 02:00.
 Rule	Uruguay	2005	only	-	Mar	27	 2:00	0	-
 # From Eduardo Cota (2005-09-27):
-# http://www.presidencia.gub.uy/_Web/decretos/2005/09/CM%20119_09%2009%202005_00001.PDF
-# This means that from 2005-10-09 at 02:00 local time, until 2006-03-12 at
-# 02:00 local time, official time in Uruguay will be at GMT -2.
-Rule	Uruguay	2005	only	-	Oct	 9	 2:00	1:00	S
-Rule	Uruguay	2006	only	-	Mar	12	 2:00	0	-
-# From Jesper Nørgaard Welen (2006-09-06):
-# http://www.presidencia.gub.uy/_web/decretos/2006/09/CM%20210_08%2006%202006_00001.PDF
-#
+# ...from 2005-10-09 at 02:00 local time, until 2006-03-12 at 02:00 local time,
+# official time in Uruguay will be at GMT -2.
+# From Tim Parenti (2018-02-15):
+# Decreto 318/005 of 2005-09-19.
+# http://www.impo.com.uy/diariooficial/2005/09/23/documentos.pdf#page=1
+Rule	Uruguay	2005	only	-	Oct	 9	 2:00	1:00	-
+Rule	Uruguay	2006	2015	-	Mar	Sun>=8	 2:00	0	-
+# From Tim Parenti (2018-02-15), per Jesper Nørgaard Welen (2006-09-06):
+# Decreto 311/006 of 2006-09-04 established regular DST from the first Sunday
+# of October at 02:00 through the second Sunday of March at 02:00.  Almanaque
+# 2018 appears to have a few typoed dates through this period; ignore them.
+# http://www.impo.com.uy/diariooficial/2006/09/08/documentos.pdf#page=1
+Rule	Uruguay	2006	2014	-	Oct	Sun>=1	 2:00	1:00	-
 # From Steffen Thorsen (2015-06-30):
 # ... it looks like they will not be using DST the coming summer:
 # http://www.elobservador.com.uy/gobierno-resolvio-que-no-habra-cambio-horario-verano-n656787
@@ -1777,17 +1905,19 @@
 # instead of out to dinner.
 # From Pablo Camargo (2015-07-13):
 # http://archivo.presidencia.gub.uy/sci/decretos/2015/06/cons_min_201.pdf
-# [dated 2015-06-29; repeals Decree 311/006 dated 2006-09-04]
-Rule	Uruguay	2006	2014	-	Oct	Sun>=1	 2:00	1:00	S
-Rule	Uruguay	2007	2015	-	Mar	Sun>=8	 2:00	0	-
+# From Tim Parenti (2018-02-15):
+# Decreto 178/015 of 2015-06-29; repeals Decreto 311/006.
 
 # This Zone can be simplified once we assume zic %z.
-Zone America/Montevideo	-3:44:44 -	LMT	1898 Jun 28
-			-3:44:44 -	MMT	1920 May  1 # Montevideo MT
+Zone America/Montevideo	-3:44:51 -	LMT	1908 Jun 10
+			-3:44:51 -	MMT	1920 May  1 # Montevideo MT
+			-4:00	-	-04	1923 Oct  1
 			-3:30	Uruguay	-0330/-03 1942 Dec 14
+			-3:00	Uruguay	-03/-0230 1960
 			-3:00	Uruguay	-03/-02	1968
-			-3:00	Uruguay	-03/-0230 1971
+			-3:00	Uruguay	-03/-0230 1970
 			-3:00	Uruguay	-03/-02	1974
+			-3:00	Uruguay	-03/-0130 1974 Mar 10
 			-3:00	Uruguay	-03/-0230 1974 Dec 22
 			-3:00	Uruguay	-03/-02
 
--- a/test/jdk/sun/util/calendar/zi/tzdata/zone.tab	Mon Apr 09 13:35:19 2018 +0200
+++ b/test/jdk/sun/util/calendar/zi/tzdata/zone.tab	Mon Apr 09 04:43:03 2018 -0700
@@ -452,7 +452,7 @@
 US	+643004-1652423	America/Nome	Alaska (west)
 US	+515248-1763929	America/Adak	Aleutian Islands
 US	+211825-1575130	Pacific/Honolulu	Hawaii
-UY	-3453-05611	America/Montevideo
+UY	-345433-0561245	America/Montevideo
 UZ	+3940+06648	Asia/Samarkand	Uzbekistan (west)
 UZ	+4120+06918	Asia/Tashkent	Uzbekistan (east)
 VA	+415408+0122711	Europe/Vatican