changeset 13684:8560bc534080

8231098: (tz) Upgrade time-zone data to tzdata2019c Reviewed-by: martin, naoto
author rpatil
date Tue, 24 Sep 2019 10:16:00 +0100
parents d355fd566378
children 69c4f673b33e
files make/data/tzdata/VERSION make/data/tzdata/asia make/data/tzdata/australasia make/data/tzdata/europe make/data/tzdata/leapseconds make/data/tzdata/northamerica make/data/tzdata/southamerica
diffstat 7 files changed, 302 insertions(+), 135 deletions(-) [+]
line wrap: on
line diff
--- a/make/data/tzdata/VERSION	Wed Sep 25 19:52:00 2019 +0100
+++ b/make/data/tzdata/VERSION	Tue Sep 24 10:16:00 2019 +0100
@@ -21,4 +21,4 @@
 # or visit www.oracle.com if you need additional information or have any
 # questions.
 #
-tzdata2019b
+tzdata2019c
--- a/make/data/tzdata/asia	Wed Sep 25 19:52:00 2019 +0100
+++ b/make/data/tzdata/asia	Tue Sep 24 10:16:00 2019 +0100
@@ -31,7 +31,7 @@
 # tz@iana.org for general use in the future).  For more, please see
 # the file CONTRIBUTING in the tz distribution.
 
-# From Paul Eggert (2018-06-19):
+# From Paul Eggert (2019-07-11):
 #
 # Unless otherwise specified, the source for data through 1990 is:
 # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
@@ -70,13 +70,13 @@
 #	7:00 WIB	west Indonesia (Waktu Indonesia Barat)
 #	8:00 WITA	central Indonesia (Waktu Indonesia Tengah)
 #	8:00 CST	China
-#	8:00 PST  PDT*	Philippine Standard Time
+#	8:00 HKT  HKST	Hong Kong (HKWT* for Winter Time in late 1941)
+#	8:00 PST  PDT*	Philippines
 #	8:30 KST  KDT	Korea when at +0830
 #	9:00 WIT	east Indonesia (Waktu Indonesia Timur)
 #	9:00 JST  JDT	Japan
 #	9:00 KST  KDT	Korea when at +09
-#	9:30 ACST	Australian Central Standard Time
-# *I invented the abbreviation PDT; see "Philippines" below.
+# *I invented the abbreviations HKWT and PDT; see below.
 # Otherwise, these tables typically use numeric abbreviations like +03
 # and +0330 for integer hour and minute UT offsets.  Although earlier
 # editions invented alphabetic time zone abbreviations for every
@@ -676,6 +676,15 @@
 # * 1941-09-30, Hong Kong Daily Press, Winter Time Warning.
 #   https://i.imgur.com/dge4kFJ.png
 
+# From Paul Eggert (2019-07-11):
+# "Hong Kong winter time" is considered to be daylight saving.
+# "Hong Kong had adopted daylight saving on June 15 as a wartime measure,
+# clocks moving forward one hour until October 1, when they would be put back
+# by just half an hour for 'Hong Kong Winter time', so that daylight saving
+# operated year round." -- Low Z. The longest day: when wartime Hong Kong
+# introduced daylight saving. South China Morning Post. 2019-06-28.
+# https://www.scmp.com/magazines/post-magazine/short-reads/article/3016281/longest-day-when-wartime-hong-kong-introduced
+
 # From P Chan (2018-12-31):
 # * According to the Hong Kong Daylight-Saving Regulations, 1941, the
 #   1941 spring-forward transition was at 03:00.
@@ -777,7 +786,7 @@
 Zone	Asia/Hong_Kong	7:36:42 -	LMT	1904 Oct 30  0:36:42
 			8:00	-	HKT	1941 Jun 15  3:00
 			8:00	1:00	HKST	1941 Oct  1  4:00
-			8:30	-	HKT	1941 Dec 25
+			8:00	0:30	HKWT	1941 Dec 25
 			9:00	-	JST	1945 Nov 18  2:00
 			8:00	HK	HK%sT
 
@@ -2442,7 +2451,7 @@
 Zone	Asia/Seoul	8:27:52	-	LMT	1908 Apr  1
 			8:30	-	KST	1912 Jan  1
 			9:00	-	JST	1945 Sep  8
-			9:00	-	KST	1954 Mar 21
+			9:00	ROK	K%sT	1954 Mar 21
 			8:30	ROK	K%sT	1961 Aug 10
 			9:00	ROK	K%sT
 Zone	Asia/Pyongyang	8:23:00 -	LMT	1908 Apr  1
@@ -3627,7 +3636,7 @@
 # and in South Vietnam in particular (after 1954):
 # To 07:00 on 1911-05-01.
 # To 08:00 on 1942-12-31 at 23:00.
-# To 09:00 in 1945-03-14 at 23:00.
+# To 09:00 on 1945-03-14 at 23:00.
 # To 07:00 on 1945-09-02 in Vietnam.
 # To 08:00 on 1947-04-01 in French-controlled Indochina.
 # To 07:00 on 1955-07-01 in South Vietnam.
--- a/make/data/tzdata/australasia	Wed Sep 25 19:52:00 2019 +0100
+++ b/make/data/tzdata/australasia	Tue Sep 24 10:16:00 2019 +0100
@@ -390,13 +390,18 @@
 # From Raymond Kumar (2018-07-13):
 # http://www.fijitimes.com/government-approves-2018-daylight-saving/
 # ... The daylight saving period will end at 3am on Sunday January 13, 2019.
-#
-# From Paul Eggert (2018-07-15):
-# For now, guess DST from 02:00 the first Sunday in November to 03:00
-# the first Sunday on or after January 13.  January transitions reportedly
+
+# From Paul Eggert (2019-08-06):
+# Today Raymond Kumar reported the Government of Fiji Gazette Supplement No. 27
+# (2019-08-02) said that Fiji observes DST "commencing at 2.00 am on
+# Sunday, 10 November 2019 and ending at 3.00 am on Sunday, 12 January 2020."
+# For now, guess DST from 02:00 the second Sunday in November to 03:00
+# the first Sunday on or after January 12.  January transitions reportedly
 # depend on when school terms start.  Although the guess is ad hoc, it matches
-# transitions since late 2014 and seems more likely to match future
-# practice than guessing no DST.
+# transitions planned this year and seems more likely to match future practice
+# than guessing no DST.
+# From Michael Deckers (2019-08-06):
+# https://www.laws.gov.fj/LawsAsMade/downloadfile/848
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 Rule	Fiji	1998	1999	-	Nov	Sun>=1	2:00	1:00	-
@@ -407,8 +412,9 @@
 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	-
-Rule	Fiji	2015	max	-	Jan	Sun>=13	3:00	0	-
+Rule	Fiji	2014	2018	-	Nov	Sun>=1	2:00	1:00	-
+Rule	Fiji	2015	max	-	Jan	Sun>=12	3:00	0	-
+Rule	Fiji	2019	max	-	Nov	Sun>=8	2:00	1:00	-
 # Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
 Zone	Pacific/Fiji	11:55:44 -	LMT	1915 Oct 26 # Suva
 			12:00	Fiji	+12/+13
@@ -627,10 +633,11 @@
 # Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
 Zone	Pacific/Norfolk	11:11:52 -	LMT	1901 # Kingston
 			11:12	-	+1112	1951
-			11:30	-	+1130	1974 Oct 27 02:00
-			11:30	1:00	+1230	1975 Mar  2 02:00
-			11:30	-	+1130	2015 Oct  4 02:00
-			11:00	-	+11
+			11:30	-	+1130	1974 Oct 27 02:00s
+			11:30	1:00	+1230	1975 Mar  2 02:00s
+			11:30	-	+1130	2015 Oct  4 02:00s
+			11:00	-	+11	2019 Jul
+			11:00	AN	+11/+12
 
 # Palau (Belau)
 # Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
@@ -1898,12 +1905,21 @@
 # ... at 12.30 am (by legal time in New South Wales) on 4 October 2015.
 # http://www.norfolkisland.gov.nf/nia/MediaRelease/Media%20Release%20Norfolk%20Island%20Standard%20Time%20Change.pdf
 
-# From Paul Eggert (2015-09-23):
+# From Paul Eggert (2019-08-28):
 # Transitions before 2015 are from timeanddate.com, which consulted
 # the Norfolk Island Museum and the Australian Bureau of Meteorology's
 # Norfolk Island station, and found no record of Norfolk observing DST
 # other than in 1974/5.  See:
 # https://www.timeanddate.com/time/australia/norfolk-island.html
+# However, disagree with timeanddate about the 1975-03-02 transition;
+# timeanddate has 02:00 but 02:00s corresponds to what the NSW law said
+# (thanks to Michael Deckers).
+
+# Norfolk started observing Australian DST in spring 2019.
+# From Kyle Czech (2019-08-13):
+# https://www.legislation.gov.au/Details/F2018L01702
+# From Michael Deckers (2019-08-14):
+# https://www.legislation.gov.au/Details/F2019C00010
 
 # Palau
 # See commentary for Micronesia.
--- a/make/data/tzdata/europe	Wed Sep 25 19:52:00 2019 +0100
+++ b/make/data/tzdata/europe	Tue Sep 24 10:16:00 2019 +0100
@@ -844,11 +844,16 @@
 # Shanks & Pottenger give 02:00, the BEV 00:00.  Go with the BEV,
 # and guess 02:00 for 1945-04-12.
 
+# From Alois Triendl (2019-07-22):
+# In 1946 the end of DST was on Monday, 7 October 1946, at 3:00 am.
+# Shanks had this right.  Source: Die Weltpresse, 5. Oktober 1946, page 5.
+
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 Rule	Austria	1920	only	-	Apr	 5	2:00s	1:00	S
 Rule	Austria	1920	only	-	Sep	13	2:00s	0	-
 Rule	Austria	1946	only	-	Apr	14	2:00s	1:00	S
-Rule	Austria	1946	1948	-	Oct	Sun>=1	2:00s	0	-
+Rule	Austria	1946	only	-	Oct	 7	2:00s	0	-
+Rule	Austria	1947	1948	-	Oct	Sun>=1	2:00s	0	-
 Rule	Austria	1947	only	-	Apr	 6	2:00s	1:00	S
 Rule	Austria	1948	only	-	Apr	18	2:00s	1:00	S
 Rule	Austria	1980	only	-	Apr	 6	0:00	1:00	S
@@ -898,15 +903,35 @@
 
 # Belgium
 #
-# From Paul Eggert (1997-07-02):
+# From Michael Deckers (2019-08-25):
+# The exposition in the web page
+# https://www.bestor.be/wiki/index.php/Voyager_dans_le_temps._L%E2%80%99introduction_de_la_norme_de_Greenwich_en_Belgique
+# gives several contemporary sources from which one can conclude that
+# the switch in Europe/Brussels on 1892-05-01 was from 00:17:30 to 00:00:00.
+#
+# From Paul Eggert (2019-08-28):
+# This quote helps explain the late-1914 situation:
+#   In early November 1914, the Germans imposed the time zone used in central
+#   Europe and forced the inhabitants to set their watches and public clocks
+#   sixty minutes ahead.  Many were reluctant to accept "German time" and
+#   continued to use "Belgian time" among themselves.  Reflecting the spirit of
+#   resistance that arose in the population, a song made fun of this change....
+# The song ended:
+#   Putting your clock forward
+#   Will but hasten the happy hour
+#   When we kick out the Boches!
+# See: Pluvinage G. Brussels on German time. Cahiers Bruxellois -
+# Brusselse Cahiers. 2014;XLVI(1E):15-38.
+# https://www.cairn.info/revue-cahiers-bruxellois-2014-1E-page-15.htm
+#
+# Entries from 1914 through 1917 are taken from "De tijd in België"
+# <https://www.astro.oma.be/GENERAL/INFO/nli001a.html>.
 # Entries from 1918 through 1991 are taken from:
 #	Annuaire de L'Observatoire Royal de Belgique,
 #	Avenue Circulaire, 3, B-1180 BRUXELLES, CLVIIe année, 1991
 #	(Imprimerie HAYEZ, s.p.r.l., Rue Fin, 4, 1080 BRUXELLES, MCMXC),
 #	pp 8-9.
-# LMT before 1892 was 0:17:30, according to the official journal of Belgium:
-#	Moniteur Belge, Samedi 30 Avril 1892, N.121.
-# Thanks to Pascal Delmoitie for these references.
+# Thanks to Pascal Delmoitie for the 1918/1991 references.
 # The 1918 rules are listed for completeness; they apply to unoccupied Belgium.
 # Assume Brussels switched to WET in 1918 when the armistice took effect.
 #
@@ -951,7 +976,7 @@
 Rule	Belgium	1946	only	-	Oct	 7	 2:00s	0	-
 # Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
 Zone	Europe/Brussels	0:17:30 -	LMT	1880
-			0:17:30	-	BMT	1892 May  1 12:00  # Brussels MT
+			0:17:30	-	BMT	1892 May  1 00:17:30
 			0:00	-	WET	1914 Nov  8
 			1:00	-	CET	1916 May  1  0:00
 			1:00	C-Eur	CE%sT	1918 Nov 11 11:00u
@@ -1650,6 +1675,13 @@
 # advanced to sixty minutes later starting at hour two on 1944-04-02; ...
 # Starting at hour three on the date 1944-09-17 standard time will be resumed.
 #
+# From Alois Triendl (2019-07-02):
+# I spent 6 Euros to buy two archive copies of Il Messaggero, a Roman paper,
+# for 1 and 2 April 1944.  The edition of 2 April has this note: "Tonight at 2
+# am, put forward the clock by one hour.  Remember that in the night between
+# today and Monday the 'ora legale' will come in force again."  That makes it
+# clear that in Rome the change was on Monday, 3 April 1944 at 2 am.
+#
 # From Paul Eggert (2016-10-27):
 # Go with INRiM for DST rules, except as corrected by Inglis for 1944
 # for the Kingdom of Italy.  This is consistent with Renzo Baldini.
@@ -1797,15 +1829,10 @@
 # From Paul Eggert (2013-09-09):
 # Shanks & Pottenger say Vaduz is like Zurich.
 
-# From Alois Treindl (2013-09-18):
-# http://www.eliechtensteinensia.li/LIJ/1978/1938-1978/1941.pdf
-# ... confirms on p. 6 that Liechtenstein followed Switzerland in 1941 and 1942.
-# I ... translate only the last two paragraphs:
-#    ... during second world war, in the years 1941 and 1942, Liechtenstein
-#    introduced daylight saving time, adapting to Switzerland.  From 1943 on
-#    central European time was in force throughout the year.
-#    From a report of the duke's government to the high council,
-#    regarding the introduction of a time law, of 31 May 1977.
+# From Alois Treindl (2019-07-04):
+# I was able to access the online archive of the Vaduz paper Vaterland ...
+# I could confirm from the paper that Liechtenstein did in fact follow
+# the same DST in 1941 and 1942 as Switzerland did.
 
 Link Europe/Zurich Europe/Vaduz
 
@@ -2513,6 +2540,12 @@
 # Europe/Kaliningrad covers...
 # 39	RU-KGD	Kaliningrad Oblast
 
+# From Paul Eggert (2019-07-25):
+# Although Shanks lists 1945-01-01 as the date for transition from
+# +01/+02 to +02/+03, more likely this is a placeholder.  Guess that
+# the transition occurred at 1945-04-10 00:00, which is about when
+# Königsberg surrendered to Soviet troops.  (Thanks to Alois Triendl.)
+
 # From Paul Eggert (2016-03-18):
 # The 1989 transition is from USSR act No. 227 (1989-03-14).
 
@@ -2529,8 +2562,8 @@
 # Moscow on 1991-11-03, switched to Moscow-1 on 1992-01-19.
 
 Zone Europe/Kaliningrad	 1:22:00 -	LMT	1893 Apr
-			 1:00	C-Eur	CE%sT	1945
-			 2:00	Poland	CE%sT	1946
+			 1:00	C-Eur	CE%sT	1945 Apr 10
+			 2:00	Poland	EE%sT	1946 Apr  7
 			 3:00	Russia	MSK/MSD	1989 Mar 26  2:00s
 			 2:00	Russia	EE%sT	2011 Mar 27  2:00s
 			 3:00	-	+03	2014 Oct 26  2:00s
@@ -3673,20 +3706,75 @@
 
 # Turkey
 
+# From Alois Treindl (2019-08-12):
+# http://www.astrolojidergisi.com/yazsaati.htm has researched the time zone
+# history of Turkey, based on newspaper archives and official documents.
+# From Paul Eggert (2019-08-28):
+# That source (Oya Vulaş, "Türkiye'de Yaz Saati Uygulamaları")
+# is used for 1940/1972, where it seems more reliable than our other
+# sources.
+
+# From Kıvanç Yazan (2019-08-12):
+# http://www.resmigazete.gov.tr/arsiv/14539.pdf#page=24
+# 1973-06-03 01:00 -> 02:00, 1973-11-04 02:00 -> 01:00
+#
+# http://www.resmigazete.gov.tr/arsiv/14829.pdf#page=1
+# 1974-03-31 02:00 -> 03:00, 1974-11-03 02:00 -> 01:00
+#
+# http://www.resmigazete.gov.tr/arsiv/15161.pdf#page=1
+# 1975-03-22 02:00 -> 03:00, 1975-11-02 02:00 -> 01:00
+#
+# http://www.resmigazete.gov.tr/arsiv/15535_1.pdf#page=1
+# 1976-03-21 02:00 -> 03:00, 1976-10-31 02:00 -> 01:00
+#
+# http://www.resmigazete.gov.tr/arsiv/15778.pdf#page=5
+# 1977-04-03 02:00 -> 03:00, 1977-10-16 02:00 -> 01:00,
+# 1978-04-02 02:00 -> 03:00 (not applied, see below)
+# 1978-10-15 02:00 -> 01:00 (not applied, see below)
+# 1979-04-01 02:00 -> 03:00 (not applied, see below)
+# 1979-10-14 02:00 -> 01:00 (not applied, see below)
+#
+# http://www.resmigazete.gov.tr/arsiv/16245.pdf#page=17
+# This cancels the previous decision, and repeats it only for 1978.
+# 1978-04-02 02:00 -> 03:00, 1978-10-15 02:00 -> 01:00
+# (not applied due to standard TZ change below)
+#
+# http://www.resmigazete.gov.tr/arsiv/16331.pdf#page=3
+# This decision changes the default longitude for Turkish time zone from 30
+# degrees East to 45 degrees East.  This means a standard TZ change, from +2
+# to +3.  This is published & applied on 1978-06-29.  At that time, Turkey was
+# already on summer time (already on 45E).  Hence, this new law just meant an
+# "continuous summer time".  Note that this was reversed in a few years.
+#
+# http://www.resmigazete.gov.tr/arsiv/18119_1.pdf#page=1
+# 1983-07-31 02:00 -> 03:00 (note that this jumps TZ to +4)
+# 1983-10-02 02:00 -> 01:00 (back to +3)
+#
+# http://www.resmigazete.gov.tr/arsiv/18561.pdf (page 1 and 34)
+# At this time, Turkey is still on +3 with no spring-forward on early
+# 1984.  This decision is published on 10/31/1984.  Page 1 declares
+# the decision of reverting the "default longitude change".  So the
+# standard time should go back to +3 (30E).  And page 34 explains when
+# that will happen: 1984-11-01 02:00 -> 01:00.  You can think of this
+# as "end of continuous summer time, change of standard time zone".
+#
+# http://www.resmigazete.gov.tr/arsiv/18713.pdf#page=1
+# 1985-04-20 01:00 -> 02:00, 1985-09-28 02:00 -> 01:00
+
 # From Kıvanç Yazan (2016-09-25):
 # 1) For 1986-2006, DST started at 01:00 local and ended at 02:00 local, with
 #    no exceptions.
 # 2) 1994's lastSun was overridden with Mar 20 ...
 # Here are official papers:
-# http://www.resmigazete.gov.tr/arsiv/19032.pdf  - page 2 for 1986
-# http://www.resmigazete.gov.tr/arsiv/19400.pdf  - page 4 for 1987
-# http://www.resmigazete.gov.tr/arsiv/19752.pdf  - page 15 for 1988
-# http://www.resmigazete.gov.tr/arsiv/20102.pdf  - page 6 for 1989
-# http://www.resmigazete.gov.tr/arsiv/20464.pdf  - page 1 for 1990 - 1992
-# http://www.resmigazete.gov.tr/arsiv/21531.pdf  - page 15 for 1993 - 1995
-# http://www.resmigazete.gov.tr/arsiv/21879.pdf  - page 1 for overriding 1994
-# http://www.resmigazete.gov.tr/arsiv/22588.pdf  - page 1 for 1996, 1997
-# http://www.resmigazete.gov.tr/arsiv/23286.pdf  - page 10 for 1998 - 2000
+# http://www.resmigazete.gov.tr/arsiv/19032.pdf#page=2 for 1986
+# http://www.resmigazete.gov.tr/arsiv/19400.pdf#page=4 for 1987
+# http://www.resmigazete.gov.tr/arsiv/19752.pdf#page=15 for 1988
+# http://www.resmigazete.gov.tr/arsiv/20102.pdf#page=6 for 1989
+# http://www.resmigazete.gov.tr/arsiv/20464.pdf#page=1 for 1990 - 1992
+# http://www.resmigazete.gov.tr/arsiv/21531.pdf#page=15 for 1993 - 1995
+# http://www.resmigazete.gov.tr/arsiv/21879.pdf#page=1 for overriding 1994
+# http://www.resmigazete.gov.tr/arsiv/22588.pdf#page=1 for 1996, 1997
+# http://www.resmigazete.gov.tr/arsiv/23286.pdf#page=10 for 1998 - 2000
 # http://www.resmigazete.gov.tr/eskiler/2001/03/20010324.htm#2  - for 2001
 # http://www.resmigazete.gov.tr/eskiler/2002/03/20020316.htm#2  - for 2002-2006
 # From Paul Eggert (2016-09-25):
@@ -3770,46 +3858,36 @@
 Rule	Turkey	1924	only	-	May	13	0:00	1:00	S
 Rule	Turkey	1924	1925	-	Oct	 1	0:00	0	-
 Rule	Turkey	1925	only	-	May	 1	0:00	1:00	S
-Rule	Turkey	1940	only	-	Jun	30	0:00	1:00	S
-Rule	Turkey	1940	only	-	Oct	 5	0:00	0	-
+Rule	Turkey	1940	only	-	Jul	 1	0:00	1:00	S
+Rule	Turkey	1940	only	-	Oct	 6	0:00	0	-
 Rule	Turkey	1940	only	-	Dec	 1	0:00	1:00	S
 Rule	Turkey	1941	only	-	Sep	21	0:00	0	-
 Rule	Turkey	1942	only	-	Apr	 1	0:00	1:00	S
-# Whitman omits the next two transition and gives 1945 Oct 1;
-# go with Shanks & Pottenger.
-Rule	Turkey	1942	only	-	Nov	 1	0:00	0	-
-Rule	Turkey	1945	only	-	Apr	 2	0:00	1:00	S
 Rule	Turkey	1945	only	-	Oct	 8	0:00	0	-
 Rule	Turkey	1946	only	-	Jun	 1	0:00	1:00	S
 Rule	Turkey	1946	only	-	Oct	 1	0:00	0	-
 Rule	Turkey	1947	1948	-	Apr	Sun>=16	0:00	1:00	S
-Rule	Turkey	1947	1950	-	Oct	Sun>=2	0:00	0	-
+Rule	Turkey	1947	1951	-	Oct	Sun>=2	0:00	0	-
 Rule	Turkey	1949	only	-	Apr	10	0:00	1:00	S
-Rule	Turkey	1950	only	-	Apr	19	0:00	1:00	S
+Rule	Turkey	1950	only	-	Apr	16	0:00	1:00	S
 Rule	Turkey	1951	only	-	Apr	22	0:00	1:00	S
-Rule	Turkey	1951	only	-	Oct	 8	0:00	0	-
+# DST for 15 months; unusual but we'll let it pass.
 Rule	Turkey	1962	only	-	Jul	15	0:00	1:00	S
-Rule	Turkey	1962	only	-	Oct	 8	0:00	0	-
+Rule	Turkey	1963	only	-	Oct	30	0:00	0	-
 Rule	Turkey	1964	only	-	May	15	0:00	1:00	S
 Rule	Turkey	1964	only	-	Oct	 1	0:00	0	-
-Rule	Turkey	1970	1972	-	May	Sun>=2	0:00	1:00	S
-Rule	Turkey	1970	1972	-	Oct	Sun>=2	0:00	0	-
 Rule	Turkey	1973	only	-	Jun	 3	1:00	1:00	S
-Rule	Turkey	1973	only	-	Nov	 4	3:00	0	-
+Rule	Turkey	1973	1976	-	Oct	Sun>=31	2:00	0	-
 Rule	Turkey	1974	only	-	Mar	31	2:00	1:00	S
-Rule	Turkey	1974	only	-	Nov	 3	5:00	0	-
-Rule	Turkey	1975	only	-	Mar	30	0:00	1:00	S
-Rule	Turkey	1975	1976	-	Oct	lastSun	0:00	0	-
-Rule	Turkey	1976	only	-	Jun	 1	0:00	1:00	S
-Rule	Turkey	1977	1978	-	Apr	Sun>=1	0:00	1:00	S
-Rule	Turkey	1977	only	-	Oct	16	0:00	0	-
-Rule	Turkey	1979	1980	-	Apr	Sun>=1	3:00	1:00	S
-Rule	Turkey	1979	1982	-	Oct	Mon>=11	0:00	0	-
-Rule	Turkey	1981	1982	-	Mar	lastSun	3:00	1:00	S
-Rule	Turkey	1983	only	-	Jul	31	0:00	1:00	S
-Rule	Turkey	1983	only	-	Oct	 2	0:00	0	-
-Rule	Turkey	1985	only	-	Apr	20	0:00	1:00	S
-Rule	Turkey	1985	only	-	Sep	28	0:00	0	-
+Rule	Turkey	1975	only	-	Mar	22	2:00	1:00	S
+Rule	Turkey	1976	only	-	Mar	21	2:00	1:00	S
+Rule	Turkey	1977	1978	-	Apr	Sun>=1	2:00	1:00	S
+Rule	Turkey	1977	1978	-	Oct	Sun>=15	2:00	0	-
+Rule	Turkey	1978	only	-	Jun	29	0:00	0	-
+Rule	Turkey	1983	only	-	Jul	31	2:00	1:00	S
+Rule	Turkey	1983	only	-	Oct	 2	2:00	0	-
+Rule	Turkey	1985	only	-	Apr	20	1:00s	1:00	S
+Rule	Turkey	1985	only	-	Sep	28	1:00s	0	-
 Rule	Turkey	1986	1993	-	Mar	lastSun	1:00s	1:00	S
 Rule	Turkey	1986	1995	-	Sep	lastSun	1:00s	0	-
 Rule	Turkey	1994	only	-	Mar	20	1:00s	1:00	S
@@ -3818,8 +3896,8 @@
 # Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
 Zone	Europe/Istanbul	1:55:52 -	LMT	1880
 			1:56:56	-	IMT	1910 Oct # Istanbul Mean Time?
-			2:00	Turkey	EE%sT	1978 Oct 15
-			3:00	Turkey	+03/+04	1985 Apr 20
+			2:00	Turkey	EE%sT	1978 Jun 29
+			3:00	Turkey	+03/+04	1984 Nov  1  2:00
 			2:00	Turkey	EE%sT	2007
 			2:00	EU	EE%sT	2011 Mar 27  1:00u
 			2:00	-	EET	2011 Mar 28  1:00u
--- a/make/data/tzdata/leapseconds	Wed Sep 25 19:52:00 2019 +0100
+++ b/make/data/tzdata/leapseconds	Tue Sep 24 10:16:00 2019 +0100
@@ -26,36 +26,39 @@
 # This file is in the public domain.
 
 # This file is generated automatically from the data in the public-domain
-# leap-seconds.list file, which can be copied from
+# NIST format leap-seconds.list file, which can be copied from
 # <ftp://ftp.nist.gov/pub/time/leap-seconds.list>
-# or <ftp://ftp.boulder.nist.gov/pub/time/leap-seconds.list>
-# or <ftp://tycho.usno.navy.mil/pub/ntp/leap-seconds.list>.
+# or <ftp://ftp.boulder.nist.gov/pub/time/leap-seconds.list>.
 # For more about leap-seconds.list, please see
 # The NTP Timescale and Leap Seconds
 # <https://www.eecis.udel.edu/~mills/leap.html>.
 
-# The International Earth Rotation and Reference Systems Service
+# The rules for leap seconds are specified in Annex 1 (Time scales) of:
+# Standard-frequency and time-signal emissions.
+# International Telecommunication Union - Radiocommunication Sector
+# (ITU-R) Recommendation TF.460-6 (02/2002)
+# <https://www.itu.int/rec/R-REC-TF.460-6-200202-I/>.
+# The International Earth Rotation and Reference Systems Service (IERS)
 # periodically uses leap seconds to keep UTC to within 0.9 s of UT1
-# (which measures the true angular orientation of the earth in space)
+# (a proxy for Earth's angle in space as measured by astronomers)
 # and publishes leap second data in a copyrighted file
 # <https://hpiers.obspm.fr/iers/bul/bulc/Leap_Second.dat>.
 # See: Levine J. Coordinated Universal Time and the leap second.
 # URSI Radio Sci Bull. 2016;89(4):30-6. doi:10.23919/URSIRSB.2016.7909995
 # <https://ieeexplore.ieee.org/document/7909995>.
 
-# There were no leap seconds before 1972, because the official mechanism
-# accounting for the discrepancy between atomic time and the earth's rotation
-# did not exist.  The first ("1 Jan 1972") data line in leap-seconds.list
+# There were no leap seconds before 1972, as no official mechanism
+# accounted for the discrepancy between atomic time (TAI) and the earth's
+# rotation.  The first ("1 Jan 1972") data line in leap-seconds.list
 # does not denote a leap second; it denotes the start of the current definition
 # of UTC.
 
-# The correction (+ or -) is made at the given time, so lines
-# will typically look like:
-#	Leap	YEAR	MON	DAY	23:59:60	+	R/S
-# or
-#	Leap	YEAR	MON	DAY	23:59:59	-	R/S
-
-# If the leap second is Rolling (R) the given time is local time (unused here).
+# All leap-seconds are Stationary (S) at the given UTC time.
+# The correction (+ or -) is made at the given time, so in the unlikely
+# event of a negative leap second, a line would look like this:
+# Leap	YEAR	MON	DAY	23:59:59	-	S
+# Typical lines look like this:
+# Leap	YEAR	MON	DAY	23:59:60	+	S
 Leap	1972	Jun	30	23:59:60	+	S
 Leap	1972	Dec	31	23:59:60	+	S
 Leap	1973	Dec	31	23:59:60	+	S
@@ -85,8 +88,8 @@
 Leap	2016	Dec	31	23:59:60	+	S
 
 # POSIX timestamps for the data in this file:
-#updated 1467936000
-#expires 1577491200
+#updated 1467936000 (2016-07-08 00:00:00 UTC)
+#expires 1593302400 (2020-06-28 00:00:00 UTC)
 
-#	Updated through IERS Bulletin C57
-#	File expires on:  28 December 2019
+#	Updated through IERS Bulletin C58
+#	File expires on:  28 June 2020
--- a/make/data/tzdata/northamerica	Wed Sep 25 19:52:00 2019 +0100
+++ b/make/data/tzdata/northamerica	Tue Sep 24 10:16:00 2019 +0100
@@ -429,6 +429,31 @@
 # From Paul Eggert (2015-12-25):
 # Assume this practice predates 1970, so Fort Pierre can use America/Chicago.
 
+# From Paul Eggert (2015-04-06):
+# In 1950s Nashville a public clock had dueling faces, one for conservatives
+# and the other for liberals; the two sides didn't agree about the time of day.
+# I haven't found a photo of this clock, nor have I tracked down the TIME
+# magazine report cited below, but here's the story as told by the late
+# American journalist John Seigenthaler, who was there:
+#
+# "The two [newspaper] owners held strongly contrasting political and
+# ideological views.  Evans was a New South liberal, Stahlman an Old South
+# conservative, and their two papers frequently clashed editorially, often on
+# the same day....  In the 1950s as the state legislature was grappling with
+# the question of whether to approve daylight saving time for the entire state,
+# TIME magazine reported:
+#
+# "'The Nashville Banner and The Nashville Tennessean rarely agree on anything
+# but the time of day - and last week they couldn't agree on that.'
+#
+# "It was all too true. The clock on the front of the building had two faces -
+# The Tennessean side of the building facing west, the other, east.  When it
+# was high noon Banner time, it was 11 a.m. Tennessean time."
+#
+# Seigenthaler J. For 100 years, Tennessean had it covered.
+# The Tennessean 2007-05-11, republished 2015-04-06.
+# https://www.tennessean.com/story/insider/extras/2015/04/06/archives-seigenthaler-for-100-years-the-tennessean-had-it-covered/25348545/
+
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
 Rule	Chicago	1920	only	-	Jun	13	2:00	1:00	D
 Rule	Chicago	1920	1921	-	Oct	lastSun	2:00	0	S
@@ -968,21 +993,21 @@
 			-5:00	US	E%sT
 #
 # Perry County, Indiana, switched from eastern to central time in April 2006.
+# From Alois Triendl (2019-07-09):
+# The Indianapolis News, Friday 27 October 1967 states that Perry County
+# returned to CST.  It went again to EST on 27 April 1969, as documented by the
+# Indianapolis star of Saturday 26 April.
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
-Rule Perry	1946	only	-	Apr	lastSun	2:00	1:00	D
-Rule Perry	1946	only	-	Sep	lastSun	2:00	0	S
-Rule Perry	1953	1954	-	Apr	lastSun	2:00	1:00	D
-Rule Perry	1953	1959	-	Sep	lastSun	2:00	0	S
 Rule Perry	1955	only	-	May	 1	0:00	1:00	D
+Rule Perry	1955	1960	-	Sep	lastSun	2:00	0	S
 Rule Perry	1956	1963	-	Apr	lastSun	2:00	1:00	D
-Rule Perry	1960	only	-	Oct	lastSun	2:00	0	S
-Rule Perry	1961	only	-	Sep	lastSun	2:00	0	S
-Rule Perry	1962	1963	-	Oct	lastSun	2:00	0	S
+Rule Perry	1961	1963	-	Oct	lastSun	2:00	0	S
 # Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
 Zone America/Indiana/Tell_City -5:47:03 - LMT	1883 Nov 18 12:12:57
 			-6:00	US	C%sT	1946
 			-6:00 Perry	C%sT	1964 Apr 26  2:00
-			-5:00	-	EST	1969
+			-5:00	-	EST	1967 Oct 29  2:00
+			-6:00	US	C%sT	1969 Apr 27  2:00
 			-5:00	US	E%sT	1971
 			-5:00	-	EST	2006 Apr  2  2:00
 			-6:00	US	C%sT
@@ -1058,16 +1083,27 @@
 # clear how this matched civil time in Louisville, so for now continue
 # to assume Louisville switched at noon new local time, like New York.
 #
+# From Michael Deckers (2019-08-06):
+# From the contemporary source given by Alois Treindl,
+# the switch in Louisville on 1946-04-28 was on 00:01
+# From Paul Eggert (2019-08-26):
+# That source was the Louisville Courier-Journal, 1946-04-27, p 4.
+# Shanks gives 02:00 for all 20th-century transition times in Louisville.
+# Evidently this is wrong for spring 1946.  Although also likely wrong
+# for other dates, we have no data.
+#
 # 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
 Rule Louisville	1921	only	-	May	1	2:00	1:00	D
 Rule Louisville	1921	only	-	Sep	1	2:00	0	S
-Rule Louisville	1941	1961	-	Apr	lastSun	2:00	1:00	D
+Rule Louisville	1941	only	-	Apr	lastSun	2:00	1:00	D
 Rule Louisville	1941	only	-	Sep	lastSun	2:00	0	S
+Rule Louisville	1946	only	-	Apr	lastSun	0:01	1:00	D
 Rule Louisville	1946	only	-	Jun	2	2:00	0	S
+Rule Louisville	1950	1961	-	Apr	lastSun	2:00	1:00	D
 Rule Louisville	1950	1955	-	Sep	lastSun	2:00	0	S
-Rule Louisville	1956	1960	-	Oct	lastSun	2:00	0	S
+Rule Louisville	1956	1961	-	Oct	lastSun	2:00	0	S
 # Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
 Zone America/Kentucky/Louisville -5:43:02 -	LMT	1883 Nov 18 12:16:58
 			-6:00	US	C%sT	1921
@@ -1157,18 +1193,19 @@
 # one hour in 1914."  This change is not in Shanks.  We have no more
 # info, so omit this for now.
 #
-# From Paul Eggert (2017-07-26):
-# Although Shanks says Detroit observed DST in 1967 from 06-14 00:01
-# until 10-29 00:01, I now see multiple reports that this is incorrect.
-# For example, according to a 50-year anniversary report about the 1967
-# Detroit riots and a major-league doubleheader on 1967-07-23, "By the time
-# the last fly ball of the doubleheader settled into the glove of leftfielder
-# Lenny Green, it was after 7 p.m.  Detroit did not observe daylight saving
-# time, so light was already starting to fail.  Twilight was made even deeper
-# by billowing columns of smoke that ascended in an unbroken wall north of the
-# ballpark."  See: Dow B. Detroit '67: As violence unfolded, Tigers played two
-# at home vs. Yankees. Detroit Free Press 2017-07-23.
-# https://www.freep.com/story/sports/mlb/tigers/2017/07/23/detroit-tigers-1967-riot-new-york-yankees/499951001/
+# From Paul Eggert (2019-07-06):
+# Due to a complicated set of legal maneuvers, in 1967 Michigan did
+# not start daylight saving time when the rest of the US did.
+# Instead, it began DST on Jun 14 at 00:01.  This was big news:
+# the Detroit Free Press reported it at the top of Page 1 on
+# 1967-06-14, in an article "State Adjusting to Switch to Fast Time"
+# by Gary Blonston, above an article about Thurgood Marshall's
+# confirmation to the US Supreme Court.  Although Shanks says Detroit
+# observed DST until 1967-10-29 00:01, that time of day seems to be
+# incorrect, as the Free Press later said DST ended in Michigan at the
+# same time as the rest of the US.  Also, although Shanks reports no DST in
+# Detroit in 1968, it did observe DST that year; in the November 1968
+# election Michigan voters narrowly repealed DST, effective 1969.
 #
 # Most of Michigan observed DST from 1973 on, but was a bit late in 1975.
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
@@ -1179,7 +1216,9 @@
 			-6:00	-	CST	1915 May 15  2:00
 			-5:00	-	EST	1942
 			-5:00	US	E%sT	1946
-			-5:00	Detroit	E%sT	1973
+			-5:00	Detroit	E%sT	1967 Jun 14  0:01
+			-5:00	US	E%sT	1969
+			-5:00	-	EST	1973
 			-5:00	US	E%sT	1975
 			-5:00	-	EST	1975 Apr 27  2:00
 			-5:00	US	E%sT
@@ -1228,6 +1267,12 @@
 #
 # Other sources occasionally used include:
 #
+#	Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94
+#	<https://www.jstor.org/stable/1774359>.
+#
+#	Pearce C. The Great Daylight Saving Time Controversy.
+#	Australian Ebook Publisher. 2017. ISBN 978-1-925516-96-8.
+#
 #	Edward W. Whitman, World Time Differences,
 #	Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated),
 #	which I found in the UCLA library.
@@ -1236,9 +1281,6 @@
 #	<http://cs.ucla.edu/~eggert/The-Waste-of-Daylight-19th.pdf>
 #	[PDF] (1914-03)
 #
-#	Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94
-#	<https://www.jstor.org/stable/1774359>.
-#
 # See the 'europe' file for Greenland.
 
 # Canada
@@ -1880,9 +1922,8 @@
 # Willett (1914-03) notes that DST "has been in operation ... in the
 # City of Moose Jaw, Saskatchewan, for one year."
 
-# From Paul Eggert (2019-04-26):
-# Chris Pearce's book "The Great Daylight Saving Time Controversy" (2017)
-# says that Regina observed DST in 1914-1917.  No dates and times,
+# From Paul Eggert (2019-07-25):
+# Pearce's book says Regina observed DST in 1914-1917.  No dates and times,
 # unfortunately.  It also says that in 1914 Saskatoon observed DST
 # from 1 June to 6 July, and that DST was also tried out in Davidson,
 # Melfort, and Prince Albert.
@@ -1962,6 +2003,19 @@
 
 # Alberta
 
+# From Alois Triendl (2019-07-19):
+# There was no DST in Alberta in 1967... Calgary Herald, 29 April 1967.
+# 1969, no DST, from Edmonton Journal 18 April 1969
+#
+# From Paul Eggert (2019-07-25):
+# Pearce's book says that Alberta's 1948 Daylight Saving Act required
+# Mountain Standard Time without DST, and that "anyone who broke that law
+# could be fined up to $25 and costs".  There seems to be no record of
+# anybody paying the fine.  The law was not changed until an August 1971
+# plebiscite reinstituted DST in 1972.  This story is also mentioned in:
+# Boyer JP. Forcing Choice: The Risky Reward of Referendums. Dundum. 2017.
+# ISBN 978-1459739123.
+
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 Rule	Edm	1918	1919	-	Apr	Sun>=8	2:00	1:00	D
 Rule	Edm	1918	only	-	Oct	27	2:00	0	S
@@ -1974,10 +2028,6 @@
 Rule	Edm	1945	only	-	Sep	lastSun	2:00	0	S
 Rule	Edm	1947	only	-	Apr	lastSun	2:00	1:00	D
 Rule	Edm	1947	only	-	Sep	lastSun	2:00	0	S
-Rule	Edm	1967	only	-	Apr	lastSun	2:00	1:00	D
-Rule	Edm	1967	only	-	Oct	lastSun	2:00	0	S
-Rule	Edm	1969	only	-	Apr	lastSun	2:00	1:00	D
-Rule	Edm	1969	only	-	Oct	lastSun	2:00	0	S
 Rule	Edm	1972	1986	-	Apr	lastSun	2:00	1:00	D
 Rule	Edm	1972	2006	-	Oct	lastSun	2:00	0	S
 # Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
@@ -2060,8 +2110,20 @@
 # been on MST (-0700) like Dawson Creek since it advanced its clocks on
 # 2015-03-08.
 #
-# From Paul Eggert (2015-09-23):
+# From Paul Eggert (2019-07-25):
 # Shanks says Fort Nelson did not observe DST in 1946, unlike Vancouver.
+# Alois Triendl confirmed this on 07-22, citing the 1946-04-27 Vancouver Daily
+# Province.  He also cited the 1946-09-28 Victoria Daily Times, which said
+# that Vancouver, Victoria, etc. "change at midnight Saturday"; for now,
+# guess they meant 02:00 Sunday since 02:00 was common practice in Vancouver.
+#
+# Early Vancouver, Volume Four, by Major J.S. Matthews, V.D., 2011 edition
+# says that a 1922 plebiscite adopted DST, but a 1923 plebiscite rejected it.
+# http://former.vancouver.ca/ctyclerk/archives/digitized/EarlyVan/SearchEarlyVan/Vol4pdf/MatthewsEarlyVancouverVol4_DaylightSavings.pdf
+# A catalog entry for a newspaper clipping seems to indicate that Vancouver
+# observed DST in 1941 from 07-07 through 09-27; see
+# https://searcharchives.vancouver.ca/daylight-saving-1918-starts-again-july-7-1941-start-d-s-sept-27-end-of-d-s-1941
+# We have no further details, so omit them for now.
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 Rule	Vanc	1918	only	-	Apr	14	2:00	1:00	D
@@ -2070,7 +2132,7 @@
 Rule	Vanc	1945	only	-	Aug	14	23:00u	1:00	P # Peace
 Rule	Vanc	1945	only	-	Sep	30	2:00	0	S
 Rule	Vanc	1946	1986	-	Apr	lastSun	2:00	1:00	D
-Rule	Vanc	1946	only	-	Oct	13	2:00	0	S
+Rule	Vanc	1946	only	-	Sep	29	2:00	0	S
 Rule	Vanc	1947	1961	-	Sep	lastSun	2:00	0	S
 Rule	Vanc	1962	2006	-	Oct	lastSun	2:00	0	S
 # Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
--- a/make/data/tzdata/southamerica	Wed Sep 25 19:52:00 2019 +0100
+++ b/make/data/tzdata/southamerica	Tue Sep 24 10:16:00 2019 +0100
@@ -1253,14 +1253,8 @@
 # From Juan Correa (2016-12-04):
 # Magallanes region ... will keep DST (UTC -3) all year round....
 # http://www.soychile.cl/Santiago/Sociedad/2016/12/04/433428/Bachelet-firmo-el-decreto-para-establecer-un-horario-unico-para-la-Region-de-Magallanes.aspx
-#
 # From Deborah Goldsmith (2017-01-19):
 # http://www.diariooficial.interior.gob.cl/publicaciones/2017/01/17/41660/01/1169626.pdf
-# From Paul Eggert (2017-01-19):
-# The above says the Magallanes change expires 2019-05-11 at 24:00,
-# so in theory, they will revert to -04/-03 after that, which means
-# they will switch from -03 to -04 one hour after Santiago does that day.
-# For now, assume that they will not revert.
 
 # From Juan Correa (2018-08-13):
 # As of moments ago, the Ministry of Energy in Chile has announced the new
@@ -1281,6 +1275,11 @@
 # So we extend the new rules on Saturdays at 24:00 mainland time indefinitely.
 # From Juan Correa (2019-02-04):
 # http://www.diariooficial.interior.gob.cl/publicaciones/2018/11/23/42212/01/1498738.pdf
+# From Paul Eggert (2019-09-01):
+# The above says the Magallanes exception expires 2022-04-02 at 24:00,
+# so in theory, they will revert to -04/-03 after that.
+# For now, assume that they will not revert,
+# since they have extended the expiration date once already.
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 Rule	Chile	1927	1931	-	Sep	 1	0:00	1:00	-