changeset 53472:e28000ef4cd0

8215982: (tz) Upgrade time-zone data to tzdata2018i Reviewed-by: naoto, rriggs
author rpatil
date Thu, 23 May 2019 08:28:06 +0100
parents c5314795acac
children e7a0af21d06a
files make/data/tzdata/VERSION make/data/tzdata/africa make/data/tzdata/asia make/data/tzdata/australasia make/data/tzdata/leapseconds make/data/tzdata/northamerica 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/TestZoneInfo310.java test/jdk/sun/util/calendar/zi/tzdata/VERSION test/jdk/sun/util/calendar/zi/tzdata/africa test/jdk/sun/util/calendar/zi/tzdata/asia test/jdk/sun/util/calendar/zi/tzdata/australasia test/jdk/sun/util/calendar/zi/tzdata/leapseconds test/jdk/sun/util/calendar/zi/tzdata/northamerica test/jdk/sun/util/calendar/zi/tzdata/zone.tab
diffstat 26 files changed, 1444 insertions(+), 324 deletions(-) [+]
line wrap: on
line diff
--- a/make/data/tzdata/VERSION	Tue Jul 16 16:36:20 2019 +0000
+++ b/make/data/tzdata/VERSION	Thu May 23 08:28:06 2019 +0100
@@ -21,4 +21,4 @@
 # or visit www.oracle.com if you need additional information or have any
 # questions.
 #
-tzdata2018g
+tzdata2018i
--- a/make/data/tzdata/africa	Tue Jul 16 16:36:20 2019 +0000
+++ b/make/data/tzdata/africa	Thu May 23 08:28:06 2019 +0100
@@ -870,8 +870,41 @@
 # From Mohamed Essedik Najd (2018-10-26):
 # Today, a Moroccan government council approved the perpetual addition
 # of 60 minutes to the regular Moroccan timezone.
-# From Brian Inglis (2018-10-26):
-# http://www.maroc.ma/fr/actualites/le-conseil-de-gouvernement-adopte-un-projet-de-decret-relatif-lheure-legale-stipulant-le
+# From Matt Johnson (2018-10-28):
+# http://www.sgg.gov.ma/Portals/1/BO/2018/BO_6720-bis_Ar.pdf
+#
+# From Maamar Abdelkader (2018-11-01):
+# We usually move clocks back the previous week end and come back to the +1
+# the week end after....  The government does not announce yet the decision
+# about this temporary change.  But it s 99% sure that it will be the case,
+# as in previous years.  An unofficial survey was done these days, showing
+# that 64% of asked peopke are ok for moving from +1 to +0 during Ramadan.
+# https://leconomiste.com/article/1035870-enquete-l-economiste-sunergia-64-des-marocains-plebiscitent-le-gmt-pendant-ramadan
+#
+# From Paul Eggert (2018-11-01):
+# For now, guess that Morocco will fall back at 03:00 the last Sunday
+# before Ramadan, and spring forward at 02:00 the first Sunday after
+# Ramadan, as this has been the practice since 2012.  To implement this,
+# transition dates for 2019 through 2037 were determined by running the
+# following program under GNU Emacs 26.1.
+# (let ((islamic-year 1440))
+#   (require 'cal-islam)
+#   (while (< islamic-year 1460)
+#     (let ((a (calendar-islamic-to-absolute (list 9 1 islamic-year)))
+#           (b (calendar-islamic-to-absolute (list 10 1 islamic-year)))
+#           (sunday 0))
+#       (while (/= sunday (mod (setq a (1- a)) 7)))
+#       (while (/= sunday (mod b 7))
+#         (setq b (1+ b)))
+#       (setq a (calendar-gregorian-from-absolute a))
+#       (setq b (calendar-gregorian-from-absolute b))
+#       (insert
+#        (format
+#         (concat "Rule\tMorocco\t%d\tonly\t-\t%s\t%2d\t 3:00\t-1:00\t-\n"
+#                 "Rule\tMorocco\t%d\tonly\t-\t%s\t%2d\t 2:00\t0\t-\n")
+#         (car (cdr (cdr a))) (calendar-month-name (car a) t) (car (cdr a))
+#         (car (cdr (cdr b))) (calendar-month-name (car b) t) (car (cdr b)))))
+#     (setq islamic-year (+ 1 islamic-year))))
 
 # RULE	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 Rule	Morocco	1939	only	-	Sep	12	 0:00	1:00	-
@@ -903,7 +936,7 @@
 Rule	Morocco	2012	only	-	Sep	30	 3:00	0	-
 Rule	Morocco	2013	only	-	Jul	 7	 3:00	0	-
 Rule	Morocco	2013	only	-	Aug	10	 2:00	1:00	-
-Rule	Morocco	2013	2018	-	Oct	lastSun	 3:00	0	-
+Rule	Morocco	2013	2017	-	Oct	lastSun	 3:00	0	-
 Rule	Morocco	2014	2018	-	Mar	lastSun	 2:00	1:00	-
 Rule	Morocco	2014	only	-	Jun	28	 3:00	0	-
 Rule	Morocco	2014	only	-	Aug	 2	 2:00	1:00	-
@@ -915,13 +948,53 @@
 Rule	Morocco	2017	only	-	Jul	 2	 2:00	1:00	-
 Rule	Morocco	2018	only	-	May	13	 3:00	0	-
 Rule	Morocco	2018	only	-	Jun	17	 2:00	1:00	-
+Rule	Morocco	2019	only	-	May	 5	 3:00	0	-
+Rule	Morocco	2019	only	-	Jun	 9	 2:00	1:00	-
+Rule	Morocco	2020	only	-	Apr	19	 3:00	0	-
+Rule	Morocco	2020	only	-	May	24	 2:00	1:00	-
+Rule	Morocco	2021	only	-	Apr	11	 3:00	0	-
+Rule	Morocco	2021	only	-	May	16	 2:00	1:00	-
+Rule	Morocco	2022	only	-	Mar	27	 3:00	0	-
+Rule	Morocco	2022	only	-	May	 8	 2:00	1:00	-
+Rule	Morocco	2023	only	-	Mar	19	 3:00	0	-
+Rule	Morocco	2023	only	-	Apr	23	 2:00	1:00	-
+Rule	Morocco	2024	only	-	Mar	10	 3:00	0	-
+Rule	Morocco	2024	only	-	Apr	14	 2:00	1:00	-
+Rule	Morocco	2025	only	-	Feb	23	 3:00	0	-
+Rule	Morocco	2025	only	-	Apr	 6	 2:00	1:00	-
+Rule	Morocco	2026	only	-	Feb	15	 3:00	0	-
+Rule	Morocco	2026	only	-	Mar	22	 2:00	1:00	-
+Rule	Morocco	2027	only	-	Feb	 7	 3:00	0	-
+Rule	Morocco	2027	only	-	Mar	14	 2:00	1:00	-
+Rule	Morocco	2028	only	-	Jan	23	 3:00	0	-
+Rule	Morocco	2028	only	-	Feb	27	 2:00	1:00	-
+Rule	Morocco	2029	only	-	Jan	14	 3:00	0	-
+Rule	Morocco	2029	only	-	Feb	18	 2:00	1:00	-
+Rule	Morocco	2029	only	-	Dec	30	 3:00	0	-
+Rule	Morocco	2030	only	-	Feb	10	 2:00	1:00	-
+Rule	Morocco	2030	only	-	Dec	22	 3:00	0	-
+Rule	Morocco	2031	only	-	Jan	26	 2:00	1:00	-
+Rule	Morocco	2031	only	-	Dec	14	 3:00	0	-
+Rule	Morocco	2032	only	-	Jan	18	 2:00	1:00	-
+Rule	Morocco	2032	only	-	Nov	28	 3:00	0	-
+Rule	Morocco	2033	only	-	Jan	 9	 2:00	1:00	-
+Rule	Morocco	2033	only	-	Nov	20	 3:00	0	-
+Rule	Morocco	2033	only	-	Dec	25	 2:00	1:00	-
+Rule	Morocco	2034	only	-	Nov	 5	 3:00	0	-
+Rule	Morocco	2034	only	-	Dec	17	 2:00	1:00	-
+Rule	Morocco	2035	only	-	Oct	28	 3:00	0	-
+Rule	Morocco	2035	only	-	Dec	 2	 2:00	1:00	-
+Rule	Morocco	2036	only	-	Oct	19	 3:00	0	-
+Rule	Morocco	2036	only	-	Nov	23	 2:00	1:00	-
+Rule	Morocco	2037	only	-	Oct	 4	 3:00	0	-
+Rule	Morocco	2037	only	-	Nov	15	 2:00	1:00	-
 
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone Africa/Casablanca	-0:30:20 -	LMT	1913 Oct 26
 			 0:00	Morocco	+00/+01	1984 Mar 16
 			 1:00	-	+01	1986
-			 0:00	Morocco	+00/+01	2018 Oct 27
-			 1:00	-	+01
+			 0:00	Morocco	+00/+01	2018 Oct 28  3:00
+			 0:00	Morocco	+00/+01
 
 # Western Sahara
 #
@@ -936,8 +1009,8 @@
 
 Zone Africa/El_Aaiun	-0:52:48 -	LMT	1934 Jan # El Aaiún
 			-1:00	-	-01	1976 Apr 14
-			 0:00	Morocco	+00/+01	2018 Oct 27
-			 1:00	-	+01
+			 0:00	Morocco	+00/+01	2018 Oct 28  3:00
+			 0:00	Morocco	+00/+01
 
 # Mozambique
 #
@@ -1094,10 +1167,20 @@
 # the switch is from 01:00 to 02:00 ... [Decree No. 25/2017]
 # http://www.mnec.gov.st/index.php/publicacoes/documentos/file/90-decreto-lei-n-25-2017
 
+# From Vadim Nasardinov (2018-12-29):
+# São Tomé and Príncipe is about to do the following on Jan 1, 2019:
+# https://www.stp-press.st/2018/12/05/governo-jesus-ja-decidiu-repor-hora-legal-sao-tomense/
+#
+# From Michael Deckers (2018-12-30):
+# https://www.legis-palop.org/download.jsp?idFile=102818
+# ... [The legal time of the country, which coincides with universal
+# coordinated time, will be restituted at 2 o'clock on day 1 of January, 2019.]
+
 Zone	Africa/Sao_Tome	 0:26:56 -	LMT	1884
 			-0:36:45 -	LMT	1912 Jan  1 00:00u # Lisbon MT
 			 0:00	-	GMT	2018 Jan  1 01:00
-			 1:00	-	WAT
+			 1:00	-	WAT	2019 Jan  1 02:00
+			 0:00	-	GMT
 
 # Senegal
 # See Africa/Abidjan.
--- a/make/data/tzdata/asia	Tue Jul 16 16:36:20 2019 +0000
+++ b/make/data/tzdata/asia	Thu May 23 08:28:06 2019 +0100
@@ -609,12 +609,82 @@
 # obtained from
 # http://www.hko.gov.hk/gts/time/Summertime.htm
 
-# From Arthur David Olson (2009-10-28):
+# From Phake Nick (2018-10-27):
+# According to Singaporean newspaper
+# http://eresources.nlb.gov.sg/newspapers/Digitised/Article/singfreepresswk19041102-1.2.37
+# the day that Hong Kong start using GMT+8 should be Oct 30, 1904.
+#
+# From Paul Eggert (2018-11-17):
+# Hong Kong had a time ball near the Marine Police Station, Tsim Sha Tsui.
+# "The ball was raised manually each day and dropped at exactly 1pm
+# (except on Sundays and Government holidays)."
+# Dyson AD. From Time Ball to Atomic Clock. Hong Kong Government. 1983.
+# <https://www.hko.gov.hk/publica/gen_pub/timeball_atomic_clock.pdf>
+# "From 1904 October 30 the time-ball at Hong Kong has been dropped by order
+# of the Governor of the Colony at 17h 0m 0s G.M.T., which is 23m 18s.14 in
+# advance of 1h 0m 0s of Hong Kong mean time."
+# Hollis HP. Universal Time, Longitudes, and Geodesy. Mon Not R Astron Soc.
+# 1905-02-10;65(4):405-6. https://doi.org/10.1093/mnras/65.4.382
+#
+# From Joseph Myers (2018-11-18):
+# An astronomer before 1925 referring to GMT would have been using the old
+# astronomical convention where the day started at noon, not midnight.
+#
+# From Steve Allen (2018-11-17):
+# Meteorological Observations made at the Hongkong Observatory in the year 1904
+# page 4 <https://books.google.com/books?id=kgw5AQAAMAAJ&pg=RA4-PA4>
+# ... the log of drop times in Table II shows that on Sunday 1904-10-30 the
+# ball was dropped.  So that looks like a special case drop for the sake
+# of broadcasting the new local time.
+#
+# From Phake Nick (2018-11-18):
+# According to The Hong Kong Weekly Press, 1904-10-29, p.324, the
+# governor of Hong Kong at the time stated that "We are further desired to
+# make it known that the change will be effected by firing the gun and by the
+# dropping of the Ball at 23min. 18sec. before one."
+# From Paul Eggert (2018-11-18):
+# See <https://mmis.hkpl.gov.hk> for this; unfortunately Flash is required.
+
+# From Phake Nick (2018-10-26):
+# I went to check microfilm records stored at Hong Kong Public Library....
+# on September 30 1941, according to Ta Kung Pao (Hong Kong edition), it was
+# stated that fallback would occur on the next day (the 1st)'s "03:00 am (Hong
+# Kong Time 04:00 am)" and the clock will fall back for a half hour. (03:00
+# probably refer to the time commonly used in mainland China at the time given
+# the paper's background) ... the sunrise/sunset time given by South China
+# Morning Post for October 1st was indeed moved by half an hour compares to
+# before.  After that, in December, the battle to capture Hong Kong started and
+# the library doesn't seems to have any record stored about press during that
+# period of time.  Some media resumed publication soon after that within the
+# same month, but there were not much information about time there.  Later they
+# started including a radio program guide when they restored radio service,
+# explicitly mentioning it use Tokyo standard time, and later added a note
+# saying it's half an hour ahead of the old Hong Kong standard time, and it
+# also seems to indicate that Hong Kong was not using GMT+8 when it was
+# captured by Japan.
+#
+# Image of related sections on newspaper:
+# * 1941-09-30, Ta Kung Pao (Hong Kong), "Winter Time start tomorrow".
+#   https://i.imgur.com/6waY51Z.jpg (Chinese)
+# * 1941-09-29, South China Morning Post, Information on sunrise/sunset
+#   time and other things for September 30 and October 1.
+#   https://i.imgur.com/kCiUR78.jpg
+# * 1942-02-05. The Hong Kong News, Radio Program Guide.
+#   https://i.imgur.com/eVvDMzS.jpg
+# * 1941-06-14. Hong Kong Daily Press, Daylight Saving from 3am Tomorrow.
+#   https://i.imgur.com/05KkvtC.png
+# * 1941-09-30, Hong Kong Daily Press, Winter Time Warning.
+#   https://i.imgur.com/dge4kFJ.png
+# Also, the Liberation day of Hong Kong after WWII which British rule
+# over the territory resumed was August 30, 1945, which I think should
+# be the termination date for the use of JST in the territory....
+
+# From Paul Eggert (2018-11-17):
 # Here are the dates given at
-# http://www.hko.gov.hk/gts/time/Summertime.htm
-# as of 2009-10-28:
+# https://www.hko.gov.hk/gts/time/Summertime.htm
+# as of 2014-06-19:
 # Year        Period
-# 1941        1 Apr to 30 Sep
+# 1941        15 Jun to 30 Sep
 # 1942        Whole year
 # 1943        Whole year
 # 1944        Whole year
@@ -625,7 +695,7 @@
 # 1949        3 Apr to 30 Oct
 # 1950        2 Apr to 29 Oct
 # 1951        1 Apr to 28 Oct
-# 1952        6 Apr to 25 Oct
+# 1952        6 Apr to 2 Nov
 # 1953        5 Apr to 1 Nov
 # 1954        21 Mar to 31 Oct
 # 1955        20 Mar to 6 Nov
@@ -654,25 +724,25 @@
 # 1978        Nil
 # 1979        13 May to 21 Oct
 # 1980 to Now Nil
-# The page does not give start or end times of day.
-# The page does not give a start date for 1942.
-# The page does not givw an end date for 1945.
-# The Japanese occupation of Hong Kong began on 1941-12-25.
-# The Japanese surrender of Hong Kong was signed 1945-09-15.
-# For lack of anything better, use start of those days as the transition times.
+# The page does not give times of day for transitions,
+# or dates for the 1942 and 1945 transitions.
+# The Japanese occupation of Hong Kong began 1941-12-25.
+# The Japanese surrender of Hong Kong was signed 1945-09-16; see:
+# Heaver S. The days after the Pacific war ended: unsettling times
+# in Hong Kong. Post Magazine. 2016-06-13.
+# https://www.scmp.com/magazines/post-magazine/article/1852990/days-after-pacific-war-ended-unsettling-times-hong-kong
+# For lack of anything better, use start of those days as the
+# transition times.
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	HK	1941	only	-	Apr	1	3:30	1:00	S
-Rule	HK	1941	only	-	Sep	30	3:30	0	-
 Rule	HK	1946	only	-	Apr	20	3:30	1:00	S
 Rule	HK	1946	only	-	Dec	1	3:30	0	-
 Rule	HK	1947	only	-	Apr	13	3:30	1:00	S
 Rule	HK	1947	only	-	Dec	30	3:30	0	-
 Rule	HK	1948	only	-	May	2	3:30	1:00	S
 Rule	HK	1948	1951	-	Oct	lastSun	3:30	0	-
-Rule	HK	1952	only	-	Oct	25	3:30	0	-
+Rule	HK	1952	1953	-	Nov	Sun>=1	3:30	0	-
 Rule	HK	1949	1953	-	Apr	Sun>=1	3:30	1:00	S
-Rule	HK	1953	only	-	Nov	1	3:30	0	-
 Rule	HK	1954	1964	-	Mar	Sun>=18	3:30	1:00	S
 Rule	HK	1954	only	-	Oct	31	3:30	0	-
 Rule	HK	1955	1964	-	Nov	Sun>=1	3:30	0	-
@@ -682,9 +752,11 @@
 Rule	HK	1979	only	-	May	Sun>=8	3:30	1:00	S
 Rule	HK	1979	only	-	Oct	Sun>=16	3:30	0	-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
-Zone	Asia/Hong_Kong	7:36:42 -	LMT	1904 Oct 30
-			8:00	HK	HK%sT	1941 Dec 25
-			9:00	-	JST	1945 Sep 15
+Zone	Asia/Hong_Kong	7:36:42 -	LMT	1904 Oct 30  0:36:42
+			8:00	-	HKT	1941 Jun 15  3:30
+			8:00	1:00	HKST	1941 Oct  1  4:00
+			8:30	-	HKT	1941 Dec 25
+			9:00	-	JST	1945 Sep 16
 			8:00	HK	HK%sT
 
 ###############################################################################
@@ -1080,6 +1152,16 @@
 
 # India
 
+# British astronomer Henry Park Hollis disliked India Standard Time's offset:
+# "A new time system has been proposed for India, Further India, and Burmah.
+# The scheme suggested is that the times of the meridians 5½ and 6½ hours
+# east of Greenwich should be adopted in these territories.  No reason is
+# given why hourly meridians five hours and six hours east should not be
+# chosen; a plan which would bring the time of India into harmony with
+# that of almost the whole of the civilised world."
+# Hollis HP. Universal Time, Longitudes, and Geodesy. Mon Not R Astron Soc.
+# 1905-02-10;65(4):405-6. https://doi.org/10.1093/mnras/65.4.382
+
 # From Ian P. Beacock, in "A brief history of (modern) time", The Atlantic
 # https://www.theatlantic.com/technology/archive/2015/12/the-creation-of-modern-time/421419/
 # (2015-12-22):
@@ -1250,12 +1332,65 @@
 # leap year calculation involved.  There has never been any serious
 # plan to change that law....
 #
-# From Paul Eggert (2006-03-22):
+# From Paul Eggert (2018-11-30):
 # Go with Shanks & Pottenger before Sept. 1991, and with Pournader thereafter.
-# I used Ed Reingold's cal-persia in GNU Emacs 21.2 to check Persian dates,
-# stopping after 2037 when 32-bit time_t's overflow.
-# That cal-persia used Birashk's approximation, which disagrees with the solar
-# calendar predictions for the year 2025, so I corrected those dates by hand.
+# I used the following code in GNU Emacs 26.1 to generate the "Rule Iran"
+# lines from 2008 through 2087.  Emacs 26.1 uses Ed Reingold's
+# cal-persia implementation of Birashk's approximation, which in the
+# 2008-2087 range disagrees with the the astronomical Persian calendar
+# for Persian years 1404 (Gregorian 2025) and 1437 (Gregorian 2058),
+# so the following code special-case those years.  See Table 15.1, page 264, of:
+# Edward M. Reingold and Nachum Dershowitz, Calendrical Calculations:
+# The Ultimate Edition, Cambridge University Press (2018).
+# https://www.cambridge.org/fr/academic/subjects/computer-science/computing-general-interest/calendrical-calculations-ultimate-edition-4th-edition
+# Page 258, footnote 2, of this book says there is some dispute over what will
+# happen in 2091 (and some other years after that), so this code
+# stops in 2087, as 2088 and 2089 agree with the "max" rule below.
+# (cl-loop
+#  initially (require 'cal-persia)
+#  with first-persian-year = 1387
+#  with last-persian-year = 1466
+#  ;; Exceptional years in the above range,
+#  ;; from Reingold & Dershowitz Table 15.1, page 264:
+#  with exceptional-persian-years = '(1404 1437)
+#  with range-start = nil
+#  for persian-year from first-persian-year to last-persian-year
+#  do
+#  (let*
+#      ((exceptional-year-offset
+#        (if (member persian-year exceptional-persian-years) 1 0))
+#       (beg-dst-absolute
+#        (+ (calendar-persian-to-absolute (list 1 1 persian-year))
+#           exceptional-year-offset))
+#       (end-dst-absolute
+#        (+ (calendar-persian-to-absolute (list 6 30 persian-year))
+#           exceptional-year-offset))
+#       (next-year-beg-dst-absolute
+#        (+ (calendar-persian-to-absolute (list 1 1 (1+ persian-year)))
+#           (if (member (1+ persian-year) exceptional-persian-years) 1 0)))
+#       (beg-dst (calendar-gregorian-from-absolute beg-dst-absolute))
+#       (end-dst (calendar-gregorian-from-absolute end-dst-absolute))
+#       (next-year-beg-dst (calendar-gregorian-from-absolute
+#                           next-year-beg-dst-absolute))
+#       (year (calendar-extract-year beg-dst))
+#       (range-end (if range-start year "only")))
+#    (setq range-start (or range-start year))
+#    (when (or (/= (calendar-extract-day beg-dst)
+#                  (calendar-extract-day next-year-beg-dst))
+#              (= persian-year last-persian-year))
+#      (insert
+#       (format
+#        "Rule\tIran\t%d\t%s\t-\t%s\t%2d\t24:00\t1:00\t-\n"
+#        range-start range-end
+#        (calendar-month-name (calendar-extract-month beg-dst) t)
+#        (calendar-extract-day beg-dst)))
+#      (insert
+#       (format
+#        "Rule\tIran\t%d\t%s\t-\t%s\t%2d\t24:00\t0\t-\n"
+#        range-start range-end
+#        (calendar-month-name (calendar-extract-month end-dst) t)
+#        (calendar-extract-day end-dst)))
+#      (setq range-start nil))))
 #
 # From Oscar van Vlijmen (2005-03-30), writing about future
 # discrepancies between cal-persia and the Iranian calendar:
@@ -1290,61 +1425,113 @@
 # 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	-
-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	-
+Rule	Iran	1978	1980	-	Mar	20	24:00	1:00	-
+Rule	Iran	1978	only	-	Oct	20	24:00	0	-
+Rule	Iran	1979	only	-	Sep	18	24:00	0	-
+Rule	Iran	1980	only	-	Sep	22	24:00	0	-
+Rule	Iran	1991	only	-	May	 2	24:00	1:00	-
+Rule	Iran	1992	1995	-	Mar	21	24:00	1:00	-
+Rule	Iran	1991	1995	-	Sep	21	24:00	0	-
+Rule	Iran	1996	only	-	Mar	20	24:00	1:00	-
+Rule	Iran	1996	only	-	Sep	20	24:00	0	-
+Rule	Iran	1997	1999	-	Mar	21	24:00	1:00	-
+Rule	Iran	1997	1999	-	Sep	21	24:00	0	-
+Rule	Iran	2000	only	-	Mar	20	24:00	1:00	-
+Rule	Iran	2000	only	-	Sep	20	24:00	0	-
+Rule	Iran	2001	2003	-	Mar	21	24:00	1:00	-
+Rule	Iran	2001	2003	-	Sep	21	24:00	0	-
+Rule	Iran	2004	only	-	Mar	20	24:00	1:00	-
+Rule	Iran	2004	only	-	Sep	20	24:00	0	-
+Rule	Iran	2005	only	-	Mar	21	24:00	1:00	-
+Rule	Iran	2005	only	-	Sep	21	24:00	0	-
+Rule	Iran	2008	only	-	Mar	20	24:00	1:00	-
+Rule	Iran	2008	only	-	Sep	20	24:00	0	-
+Rule	Iran	2009	2011	-	Mar	21	24:00	1:00	-
+Rule	Iran	2009	2011	-	Sep	21	24:00	0	-
+Rule	Iran	2012	only	-	Mar	20	24:00	1:00	-
+Rule	Iran	2012	only	-	Sep	20	24:00	0	-
+Rule	Iran	2013	2015	-	Mar	21	24:00	1:00	-
+Rule	Iran	2013	2015	-	Sep	21	24:00	0	-
+Rule	Iran	2016	only	-	Mar	20	24:00	1:00	-
+Rule	Iran	2016	only	-	Sep	20	24:00	0	-
+Rule	Iran	2017	2019	-	Mar	21	24:00	1:00	-
+Rule	Iran	2017	2019	-	Sep	21	24:00	0	-
+Rule	Iran	2020	only	-	Mar	20	24:00	1:00	-
+Rule	Iran	2020	only	-	Sep	20	24:00	0	-
+Rule	Iran	2021	2023	-	Mar	21	24:00	1:00	-
+Rule	Iran	2021	2023	-	Sep	21	24:00	0	-
+Rule	Iran	2024	only	-	Mar	20	24:00	1:00	-
+Rule	Iran	2024	only	-	Sep	20	24:00	0	-
+Rule	Iran	2025	2027	-	Mar	21	24:00	1:00	-
+Rule	Iran	2025	2027	-	Sep	21	24:00	0	-
+Rule	Iran	2028	2029	-	Mar	20	24:00	1:00	-
+Rule	Iran	2028	2029	-	Sep	20	24:00	0	-
+Rule	Iran	2030	2031	-	Mar	21	24:00	1:00	-
+Rule	Iran	2030	2031	-	Sep	21	24:00	0	-
+Rule	Iran	2032	2033	-	Mar	20	24:00	1:00	-
+Rule	Iran	2032	2033	-	Sep	20	24:00	0	-
+Rule	Iran	2034	2035	-	Mar	21	24:00	1:00	-
+Rule	Iran	2034	2035	-	Sep	21	24:00	0	-
+Rule	Iran	2036	2037	-	Mar	20	24:00	1:00	-
+Rule	Iran	2036	2037	-	Sep	20	24:00	0	-
+Rule	Iran	2038	2039	-	Mar	21	24:00	1:00	-
+Rule	Iran	2038	2039	-	Sep	21	24:00	0	-
+Rule	Iran	2040	2041	-	Mar	20	24:00	1:00	-
+Rule	Iran	2040	2041	-	Sep	20	24:00	0	-
+Rule	Iran	2042	2043	-	Mar	21	24:00	1:00	-
+Rule	Iran	2042	2043	-	Sep	21	24:00	0	-
+Rule	Iran	2044	2045	-	Mar	20	24:00	1:00	-
+Rule	Iran	2044	2045	-	Sep	20	24:00	0	-
+Rule	Iran	2046	2047	-	Mar	21	24:00	1:00	-
+Rule	Iran	2046	2047	-	Sep	21	24:00	0	-
+Rule	Iran	2048	2049	-	Mar	20	24:00	1:00	-
+Rule	Iran	2048	2049	-	Sep	20	24:00	0	-
+Rule	Iran	2050	2051	-	Mar	21	24:00	1:00	-
+Rule	Iran	2050	2051	-	Sep	21	24:00	0	-
+Rule	Iran	2052	2053	-	Mar	20	24:00	1:00	-
+Rule	Iran	2052	2053	-	Sep	20	24:00	0	-
+Rule	Iran	2054	2055	-	Mar	21	24:00	1:00	-
+Rule	Iran	2054	2055	-	Sep	21	24:00	0	-
+Rule	Iran	2056	2057	-	Mar	20	24:00	1:00	-
+Rule	Iran	2056	2057	-	Sep	20	24:00	0	-
+Rule	Iran	2058	2059	-	Mar	21	24:00	1:00	-
+Rule	Iran	2058	2059	-	Sep	21	24:00	0	-
+Rule	Iran	2060	2062	-	Mar	20	24:00	1:00	-
+Rule	Iran	2060	2062	-	Sep	20	24:00	0	-
+Rule	Iran	2063	only	-	Mar	21	24:00	1:00	-
+Rule	Iran	2063	only	-	Sep	21	24:00	0	-
+Rule	Iran	2064	2066	-	Mar	20	24:00	1:00	-
+Rule	Iran	2064	2066	-	Sep	20	24:00	0	-
+Rule	Iran	2067	only	-	Mar	21	24:00	1:00	-
+Rule	Iran	2067	only	-	Sep	21	24:00	0	-
+Rule	Iran	2068	2070	-	Mar	20	24:00	1:00	-
+Rule	Iran	2068	2070	-	Sep	20	24:00	0	-
+Rule	Iran	2071	only	-	Mar	21	24:00	1:00	-
+Rule	Iran	2071	only	-	Sep	21	24:00	0	-
+Rule	Iran	2072	2074	-	Mar	20	24:00	1:00	-
+Rule	Iran	2072	2074	-	Sep	20	24:00	0	-
+Rule	Iran	2075	only	-	Mar	21	24:00	1:00	-
+Rule	Iran	2075	only	-	Sep	21	24:00	0	-
+Rule	Iran	2076	2078	-	Mar	20	24:00	1:00	-
+Rule	Iran	2076	2078	-	Sep	20	24:00	0	-
+Rule	Iran	2079	only	-	Mar	21	24:00	1:00	-
+Rule	Iran	2079	only	-	Sep	21	24:00	0	-
+Rule	Iran	2080	2082	-	Mar	20	24:00	1:00	-
+Rule	Iran	2080	2082	-	Sep	20	24:00	0	-
+Rule	Iran	2083	only	-	Mar	21	24:00	1:00	-
+Rule	Iran	2083	only	-	Sep	21	24:00	0	-
+Rule	Iran	2084	2086	-	Mar	20	24:00	1:00	-
+Rule	Iran	2084	2086	-	Sep	20	24:00	0	-
+Rule	Iran	2087	only	-	Mar	21	24:00	1:00	-
+Rule	Iran	2087	only	-	Sep	21	24:00	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.
+# The following rules are approximations starting in the year 2088.
+# These are the best post-2088 approximations available, given the
+# restrictions of a single rule using ordinary Gregorian dates.
 # 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	-
-Rule	Iran	2036	max	-	Sep	21	0:00	0	-
+Rule	Iran	2088	max	-	Mar	20	24:00	1:00	-
+Rule	Iran	2088	max	-	Sep	20	24:00	0	-
 
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Asia/Tehran	3:25:44	-	LMT	1916
@@ -1714,7 +1901,9 @@
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Asia/Tokyo	9:18:59	-	LMT	1887 Dec 31 15:00u
 			9:00	Japan	J%sT
-# Since 1938, all Japanese possessions have been like Asia/Tokyo.
+# Since 1938, all Japanese possessions have been like Asia/Tokyo,
+# except that Truk (Chuuk), Ponape (Pohnpei), and Jaluit (Kosrae) did not
+# switch from +10 to +09 until 1941-04-01; see the 'australasia' file.
 
 # Jordan
 #
@@ -2004,8 +2193,10 @@
 # and in Byalokoz) lists Ural river (plus 10 versts on its left bank) in
 # the third time belt (before 1930 this means +03).
 
-# From Paul Eggert (2016-12-06):
-# The tables below reflect Golosunov's remarks, with exceptions as noted.
+# From Alexander Konzurovski (2018-12-20):
+# Qyzyolrda Region (Asia/Qyzylorda) is changing its time zone from
+# UTC+6 to UTC+5 effective December 21st, 2018. The legal document is
+# located here: http://adilet.zan.kz/rus/docs/P1800000817 (russian language).
 
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 #
@@ -2019,8 +2210,6 @@
 			6:00 RussiaAsia	+06/+07	2004 Oct 31  2:00s
 			6:00	-	+06
 # Qyzylorda (aka Kyzylorda, Kizilorda, Kzyl-Orda, etc.) (KZ-KZY)
-# This currently includes Qostanay (aka Kostanay, Kustanay) (KZ-KUS);
-# see comments below.
 Zone	Asia/Qyzylorda	4:21:52 -	LMT	1924 May  2
 			4:00	-	+04	1930 Jun 21
 			5:00	-	+05	1981 Apr  1
@@ -2031,21 +2220,22 @@
 			5:00 RussiaAsia	+05/+06	1992 Jan 19  2:00s
 			6:00 RussiaAsia	+06/+07	1992 Mar 29  2:00s
 			5:00 RussiaAsia	+05/+06	2004 Oct 31  2:00s
+			6:00	-	+06	2018 Dec 21  0:00
+			5:00	-	+05
+#
+# Qostanay (aka Kostanay, Kustanay) (KZ-KUS)
+# The 1991/2 rules are unclear partly because of the 1997 Turgai
+# reorganization.
+Zone	Asia/Qostanay	4:14:28 -	LMT	1924 May  2
+			4:00	-	+04	1930 Jun 21
+			5:00	-	+05	1981 Apr  1
+			5:00	1:00	+06	1981 Oct  1
+			6:00	-	+06	1982 Apr  1
+			5:00 RussiaAsia	+05/+06	1991 Mar 31  2:00s
+			4:00 RussiaAsia	+04/+05	1992 Jan 19  2:00s
+			5:00 RussiaAsia	+05/+06	2004 Oct 31  2:00s
 			6:00	-	+06
-# The following zone is like Asia/Qyzylorda except for being one
-# hour earlier from 1991-09-29 to 1992-03-29.  The 1991/2 rules for
-# Qostanay are unclear partly because of the 1997 Turgai
-# reorganization, so this zone is commented out for now.
-#Zone	Asia/Qostanay	4:14:20 -	LMT	1924 May  2
-#			4:00	-	+04	1930 Jun 21
-#			5:00	-	+05	1981 Apr  1
-#			5:00	1:00	+06	1981 Oct  1
-#			6:00	-	+06	1982 Apr  1
-#			5:00 RussiaAsia	+05/+06	1991 Mar 31  2:00s
-#			4:00 RussiaAsia	+04/+05	1992 Jan 19  2:00s
-#			5:00 RussiaAsia	+05/+06	2004 Oct 31  2:00s
-#			6:00	-	+06
-#
+
 # Aqtöbe (aka Aktobe, formerly Aktyubinsk) (KZ-AKT)
 Zone	Asia/Aqtobe	3:48:40	-	LMT	1924 May  2
 			4:00	-	+04	1930 Jun 21
@@ -2139,21 +2329,43 @@
 # started at June 1 in that year.  For another example, the article in
 # 1988 said that DST started at 2:00 AM in that year.
 
+# From Phake Nick (2018-10-27):
+# 1. According to official announcement from Korean government, the DST end
+# date in South Korea should be
+# 1955-09-08 without specifying time
+# http://theme.archives.go.kr/next/common/viewEbook.do?singleData=N&archiveEventId=0027977557
+# 1956-09-29 without specifying time
+# http://theme.archives.go.kr/next/common/viewEbook.do?singleData=N&archiveEventId=0027978341
+# 1957-09-21 24 o'clock
+# http://theme.archives.go.kr/next/common/viewEbook.do?singleData=N&archiveEventId=0027979690#3
+# 1958-09-20 24 o'clock
+# http://theme.archives.go.kr/next/common/viewEbook.do?singleData=N&archiveEventId=0027981189
+# 1959-09-19 24 o'clock
+# http://theme.archives.go.kr/next/common/viewEbook.do?singleData=N&archiveEventId=0027982974#2
+# 1960-09-17 24 o'clock
+# http://theme.archives.go.kr/next/common/viewEbook.do?singleData=N&archiveEventId=0028044104
+# ...
+# 2.... https://namu.wiki/w/대한민국%20표준시 ... [says]
+# when Korea was using GMT+8:30 as standard time, the international
+# aviation/marine/meteorological industry in the country refused to
+# follow and continued to use GMT+9:00 for interoperability.
+
+
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	ROK	1948	only	-	Jun	 1	0:00	1:00	D
-Rule	ROK	1948	only	-	Sep	13	0:00	0	S
-Rule	ROK	1949	only	-	Apr	 3	0:00	1:00	D
-Rule	ROK	1949	1951	-	Sep	Sun>=8	0:00	0	S
-Rule	ROK	1950	only	-	Apr	 1	0:00	1:00	D
-Rule	ROK	1951	only	-	May	 6	0:00	1:00	D
-Rule	ROK	1955	only	-	May	 5	0:00	1:00	D
-Rule	ROK	1955	only	-	Sep	 9	0:00	0	S
-Rule	ROK	1956	only	-	May	20	0:00	1:00	D
-Rule	ROK	1956	only	-	Sep	30	0:00	0	S
-Rule	ROK	1957	1960	-	May	Sun>=1	0:00	1:00	D
-Rule	ROK	1957	1960	-	Sep	Sun>=18	0:00	0	S
-Rule	ROK	1987	1988	-	May	Sun>=8	2:00	1:00	D
-Rule	ROK	1987	1988	-	Oct	Sun>=8	3:00	0	S
+Rule	ROK	1948	only	-	Jun	 1	 0:00	1:00	D
+Rule	ROK	1948	only	-	Sep	12	24:00	0	S
+Rule	ROK	1949	only	-	Apr	 3	 0:00	1:00	D
+Rule	ROK	1949	1951	-	Sep	Sat>=7	24:00	0	S
+Rule	ROK	1950	only	-	Apr	 1	 0:00	1:00	D
+Rule	ROK	1951	only	-	May	 6	 0:00	1:00	D
+Rule	ROK	1955	only	-	May	 5	 0:00	1:00	D
+Rule	ROK	1955	only	-	Sep	 8	24:00	0	S
+Rule	ROK	1956	only	-	May	20	 0:00	1:00	D
+Rule	ROK	1956	only	-	Sep	29	24:00	0	S
+Rule	ROK	1957	1960	-	May	Sun>=1	 0:00	1:00	D
+Rule	ROK	1957	1960	-	Sep	Sat>=17	24:00	0	S
+Rule	ROK	1987	1988	-	May	Sun>=8	 2:00	1:00	D
+Rule	ROK	1987	1988	-	Oct	Sun>=8	 3:00	0	S
 
 # From Paul Eggert (2016-08-23):
 # The Korean Wikipedia entry gives the following sources for UT offsets:
@@ -2943,6 +3155,11 @@
 # no information
 
 # Philippines
+
+# From Paul Eggert (2018-11-18):
+# The Spanish initially used American (west-of-Greenwich) time.
+# It is unknown what time Manila kept when the British occupied it from
+# 1762-10-06 through 1764-04; for now assume it kept American time.
 # On 1844-08-16, Narciso Clavería, governor-general of the
 # Philippines, issued a proclamation announcing that 1844-12-30 was to
 # be immediately followed by 1845-01-01; see R.H. van Gent's
@@ -3028,8 +3245,8 @@
 # going to run on Higgins Time.' And so, until last year, it did."  See:
 # Antar E. Dinner at When? Saudi Aramco World, 1969 March/April. 2-3.
 # http://archive.aramcoworld.com/issue/196902/dinner.at.when.htm
-# newspapers.com says a similar story about Higgins was published in the Port
-# Angeles (WA) Evening News, 1965-03-10, page 5, but I lack access to the text.
+# Also see: Antar EN. Arabian flying is confusing.
+# Port Angeles (WA) Evening News. 1965-03-10. page 3.
 #
 # The TZ database cannot represent quasi-solar time; airline time is the best
 # we can do.  The 1946 foreign air news digest of the U.S. Civil Aeronautics
--- a/make/data/tzdata/australasia	Tue Jul 16 16:36:20 2019 +0000
+++ b/make/data/tzdata/australasia	Thu May 23 08:28:06 2019 +0100
@@ -425,10 +425,44 @@
 # it is uninhabited.
 
 # Guam
+
+# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
+# http://guamlegislature.com/Public_Laws_5th/PL05-025.pdf
+# http://documents.guam.gov/wp-content/uploads/E.O.-59-7-Guam-Daylight-Savings-Time-May-6-1959.pdf
+Rule	Guam	1959	only	-	Jun	27	2:00	1:00	D
+# http://documents.guam.gov/wp-content/uploads/E.O.-61-5-Revocation-of-Daylight-Saving-Time-and-Restoratio.pdf
+Rule	Guam	1961	only	-	Jan	29	2:00	0	S
+# http://documents.guam.gov/wp-content/uploads/E.O.-67-13-Guam-Daylight-Savings-Time.pdf
+Rule	Guam	1967	only	-	Sep	 1	2:00	1:00	D
+# http://documents.guam.gov/wp-content/uploads/E.O.-69-2-Repeal-of-Guam-Daylight-Saving-Time.pdf
+Rule	Guam	1969	only	-	Jan	26	0:01	0	S
+# http://documents.guam.gov/wp-content/uploads/E.O.-69-10-Guam-Daylight-Saving-Time.pdf
+Rule	Guam	1969	only	-	Jun	22	2:00	1:00	D
+Rule	Guam	1969	only	-	Aug	31	2:00	0	S
+# http://documents.guam.gov/wp-content/uploads/E.O.-70-10-Guam-Daylight-Saving-Time.pdf
+# http://documents.guam.gov/wp-content/uploads/E.O.-70-30-End-of-Guam-Daylight-Saving-Time.pdf
+# http://documents.guam.gov/wp-content/uploads/E.O.-71-5-Guam-Daylight-Savings-Time.pdf
+Rule	Guam	1970	1971	-	Apr	lastSun	2:00	1:00	D
+Rule	Guam	1970	1971	-	Sep	Sun>=1	2:00	0	S
+# http://documents.guam.gov/wp-content/uploads/E.O.-73-28.-Guam-Day-light-Saving-Time.pdf
+Rule	Guam	1973	only	-	Dec	16	2:00	1:00	D
+# http://documents.guam.gov/wp-content/uploads/E.O.-74-7-Guam-Daylight-Savings-Time-Rescinded.pdf
+Rule	Guam	1974	only	-	Feb	24	2:00	0	S
+# http://documents.guam.gov/wp-content/uploads/E.O.-76-13-Daylight-Savings-Time.pdf
+Rule	Guam	1976	only	-	May	26	2:00	1:00	D
+# http://documents.guam.gov/wp-content/uploads/E.O.-76-25-Revocation-of-E.O.-76-13.pdf
+Rule	Guam	1976	only	-	Aug	22	2:01	0	S
+# http://documents.guam.gov/wp-content/uploads/E.O.-77-4-Daylight-Savings-Time.pdf
+Rule	Guam	1977	only	-	Apr	24	2:00	1:00	D
+# http://documents.guam.gov/wp-content/uploads/E.O.-77-18-Guam-Standard-Time.pdf
+Rule	Guam	1977	only	-	Aug	28	2:00	0	S
+
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Pacific/Guam	-14:21:00 -	LMT	1844 Dec 31
 			 9:39:00 -	LMT	1901        # Agana
-			10:00	-	GST	2000 Dec 23 # Guam
+			10:00	-	GST	1941 Dec 10 # Guam
+			 9:00	-	+09	1944 Jul 31
+			10:00	Guam	G%sT	2000 Dec 23
 			10:00	-	ChST	# Chamorro Standard Time
 Link Pacific/Guam Pacific/Saipan # N Mariana Is
 
@@ -450,31 +484,56 @@
 
 # Marshall Is
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
-Zone Pacific/Majuro	11:24:48 -	LMT	1901
-			11:00	-	+11	1969 Oct
-			12:00	-	+12
-Zone Pacific/Kwajalein	11:09:20 -	LMT	1901
-			11:00	-	+11	1969 Oct
-			-12:00	-	-12	1993 Aug 20
-			12:00	-	+12
+Zone Pacific/Majuro	 11:24:48 -	LMT	1901
+			 11:00	-	+11	1914 Oct
+			  9:00	-	+09	1919 Feb  1
+			 11:00	-	+11	1937
+			 10:00	-	+10	1941 Apr  1
+			  9:00	-	+09	1944 Jan 30
+			 11:00	-	+11	1969 Oct
+			 12:00	-	+12
+Zone Pacific/Kwajalein	 11:09:20 -	LMT	1901
+			 11:00	-	+11	1937
+			 10:00	-	+10	1941 Apr  1
+			  9:00	-	+09	1944 Feb  6
+			 11:00	-	+11	1969 Oct
+			-12:00	-	-12	1993 Aug 20 24:00
+			 12:00	-	+12
 
 # Micronesia
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
-Zone Pacific/Chuuk	10:07:08 -	LMT	1901
-			10:00	-	+10
-Zone Pacific/Pohnpei	10:32:52 -	LMT	1901 # Kolonia
-			11:00	-	+11
-Zone Pacific/Kosrae	10:51:56 -	LMT	1901
-			11:00	-	+11	1969 Oct
-			12:00	-	+12	1999
-			11:00	-	+11
+Zone Pacific/Chuuk	-13:52:52 -	LMT	1844 Dec 31
+			 10:07:08 -	LMT	1901
+			 10:00	-	+10	1914 Oct
+			  9:00	-	+09	1919 Feb  1
+			 10:00	-	+10	1941 Apr  1
+			  9:00	-	+09	1945 Aug
+			 10:00	-	+10
+Zone Pacific/Pohnpei	-13:27:08 -	LMT	1844 Dec 31	# Kolonia
+			 10:32:52 -	LMT	1901
+			 11:00	-	+11	1914 Oct
+			  9:00	-	+09	1919 Feb  1
+			 11:00	-	+11	1937
+			 10:00	-	+10	1941 Apr  1
+			  9:00	-	+09	1945 Aug
+			 11:00	-	+11
+Zone Pacific/Kosrae	-13:08:04 -	LMT	1844 Dec 31
+			 10:51:56 -	LMT	1901
+			 11:00	-	+11	1914 Oct
+			  9:00	-	+09	1919 Feb  1
+			 11:00	-	+11	1937
+			 10:00	-	+10	1941 Apr  1
+			  9:00	-	+09	1945 Aug
+			 11:00	-	+11	1969 Oct
+			 12:00	-	+12	1999
+			 11:00	-	+11
 
 # Nauru
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Pacific/Nauru	11:07:40 -	LMT	1921 Jan 15 # Uaobe
-			11:30	-	+1130	1942 Mar 15
-			9:00	-	+09	1944 Aug 15
-			11:30	-	+1130	1979 May
+			11:30	-	+1130	1942 Aug 29
+			 9:00	-	+09	1945 Sep  8
+			11:30	-	+1130	1979 Feb 10  2:00
 			12:00	-	+12
 
 # New Caledonia
@@ -575,8 +634,9 @@
 
 # Palau (Belau)
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
-Zone Pacific/Palau	8:57:56 -	LMT	1901 # Koror
-			9:00	-	+09
+Zone Pacific/Palau	-15:02:04 -	LMT	1844 Dec 31	# Koror
+			  8:57:56 -	LMT	1901
+			  9:00	-	+09
 
 # Papua New Guinea
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
@@ -838,7 +898,7 @@
 # tz@iana.org for general use in the future).  For more, please see
 # the file CONTRIBUTING in the tz distribution.
 
-# From Paul Eggert (2017-02-10):
+# From Paul Eggert (2018-11-18):
 #
 # Unless otherwise specified, the source for data through 1990 is:
 # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
@@ -863,6 +923,7 @@
 # A reliable and entertaining source about time zones is
 # Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997).
 #
+# I invented the abbreviation marked "*".
 # The following abbreviations are from other sources.
 # Corrections are welcome!
 #		std	dst
@@ -870,7 +931,7 @@
 #	  8:00	AWST	AWDT	Western Australia
 #	  9:30	ACST	ACDT	Central Australia
 #	 10:00	AEST	AEDT	Eastern Australia
-#	 10:00	GST		Guam through 2000
+#	 10:00	GST	GDT*	Guam through 2000
 #	 10:00	ChST		Chamorro
 #	 11:30	NZMT	NZST	New Zealand through 1945
 #	 12:00	NZST	NZDT	New Zealand 1946-present
@@ -1569,28 +1630,70 @@
 
 # Kwajalein
 
-# In comp.risks 14.87 (26 August 1993), Peter Neumann writes:
-# I wonder what happened in Kwajalein, where there was NO Friday,
-# 1993-08-20.  Thursday night at midnight Kwajalein switched sides with
-# respect to the International Date Line, to rejoin its fellow islands,
-# going from 11:59 p.m. Thursday to 12:00 m. Saturday in a blink.
+# From an AP article (1993-08-22):
+# "The nearly 3,000 Americans living on this remote Pacific atoll have a good
+# excuse for not remembering Saturday night: there wasn't one.  Residents were
+# going to bed Friday night and waking up Sunday morning because at midnight
+# -- 8 A.M. Eastern daylight time on Saturday -- Kwajalein was jumping from
+# one side of the international date line to the other."
+# "In Marshall Islands, Friday is followed by Sunday", NY Times. 1993-08-22.
+# https://www.nytimes.com/1993/08/22/world/in-marshall-islands-friday-is-followed-by-sunday.html
+
+# From Phake Nick (2018-10-27):
+# <https://wiki.suikawiki.org/n/南洋群島の標準時> ... pointed out that
+# currently tzdata say Pacific/Kwajalein switched from GMT+11 to GMT-12 in
+# 1969 October without explanation, however an 1993 article from NYT say it
+# synchorized its day with US mainland about 40 years ago and thus the switch
+# should occur at around 1950s instead.
+#
+# From Paul Eggert (2018-11-18):
+# The NYT (actually, AP) article is vague and possibly wrong about this.
+# The article says the earlier switch was "40 years ago when the United States
+# Army established a missile test range here".  However, the Kwajalein Test
+# Center was established on 1960-10-01 and was run by the US Navy.  It was
+# transferred to the US Army on 1964-07-01.  See "Seize the High Ground"
+# <https://history.army.mil/html/books/070/70-88-1/cmhPub_70-88-1.pdf>.
+# Given that Shanks was right on the money about the 1993 change, I'm inclined
+# to take Shanks's word for the 1969 change unless we find better evidence.
 
 
 # N Mariana Is, Guam
 
+# From Phake Nick (2018-10-27):
+# Guam Island was briefly annexed by Japan during ... year 1941-1944 ...
+# however there are no detailed information about what time it use during that
+# period.  It would probably be reasonable to assume Guam use GMT+9 during
+# that period of time like the surrounding area.
+
+# From Paul Eggert (2018-11-18):
 # Howse writes (p 153) "The Spaniards, on the other hand, reached the
 # Philippines and the Ladrones from America," and implies that the Ladrones
 # (now called the Marianas) kept American date for quite some time.
 # For now, we assume the Ladrones switched at the same time as the Philippines;
 # see Asia/Manila.
-
+#
+# Use 1941-12-10 and 1944-07-31 for Guam WWII transitions, as the rough start
+# and end of Japanese control of Agana.  We don't know whether the Northern
+# Marianas followed Guam's DST rules from 1959 through 1977; for now, assume
+# they did as that avoids the need for a separate zone due to our 1970 cutoff.
+#
 # US Public Law 106-564 (2000-12-23) made UT +10 the official standard time,
 # under the name "Chamorro Standard Time".  There is no official abbreviation,
 # but Congressman Robert A. Underwood, author of the bill that became law,
 # wrote in a press release (2000-12-27) that he will seek the use of "ChST".
 
+# See also the commentary for Micronesia.
 
-# Micronesia
+
+# Marshall Is
+# See the commentary for Micronesia.
+
+
+# Micronesia (and nearby)
+
+# From Paul Eggert (2018-11-18):
+# Like the Ladrones (see Guam commentary), assume the Spanish East Indies
+# kept American time until the Philippines switched at the end of 1844.
 
 # Alan Eugene Davis writes (1996-03-16),
 # "I am certain, having lived there for the past decade, that 'Truk'
@@ -1606,6 +1709,95 @@
 # that Truk and Yap are UT +10, and Ponape and Kosrae are +11.
 # We don't know when Kosrae switched from +12; assume January 1 for now.
 
+# From Phake Nick (2018-10-27):
+#
+# From a Japanese wiki site https://wiki.suikawiki.org/n/南洋群島の標準時
+# ...
+# For "Southern Islands" (modern region of Mariana + Palau + Federation of
+# Micronesia + Marshall Islands):
+#
+# A 1906 Japanese magazine shown the Caroline Islands and Mariana Islands
+# who was occupied by Germany at the time as GMT+10, together with the like
+# of German New Guinea.  However there is a marking saying it have not been
+# implemented (yet).  No further information after that were found.
+#
+# Japan invaded those islands in 1914, and records shows that they were
+# instructed to use JST at the time.
+#
+# 1915 January telecommunication record on the Jaluit Atoll shows they use
+# the meridian of 170E as standard time (GMT+11:20), which is similar to the
+# longitude of the atoll.
+# 1915 February record say the 170E standard time is to be used until
+# February 9 noon, and after February 9 noon they are to use JST.
+# However these are time used within the Japanese Military at the time and
+# probably does not reflect the time used by local resident at the time (that
+# is if they keep their own time back then)
+#
+# In January 1919 the occupying force issued a command that split the area
+# into three different timezone with meridian of 135E, 150E, 165E (JST+0, +1,
+# +2), and the command was to become effective from February 1 of the same
+# year.  Despite the target of the command is still only for the occupying
+# force itself, further publication have described the time as the standard
+# time for the occupied area and thus it can probably be seen as such.
+#  * Area that use meridian of 135E: Palau and Yap civil administration area
+#    (Southern Islands Western Standard Time)
+#  * Area that use meridian of 150E: Truk (Chuuk) and Saipan civil
+#    administration area (Southern Islands Central Standard Time)
+#  * Area that use meridian of 165E: Ponape (Pohnpei) and Jaluit civil
+#    administration area (Southern Islands Eastern Standard Time).
+#  * In the next few years Japanese occupation of those islands have been
+#    formalized via League of Nation Mandate (South Pacific Mandate) and formal
+#    governance structure have been established, these district [become
+#    subprefectures] and timezone classification have been inherited as standard
+#    time of the area.
+#  * Saipan subprefecture include Mariana islands (exclude Guam which was
+#    occupied by America at the time), Palau and Yap subprefecture rule the
+#    Western Caroline Islands with 137E longitude as border, Truk and Ponape
+#    subprefecture rule the Eastern Caroline Islands with 154E as border, Ponape
+#    subprefecture also rule part of Marshall Islands to the west of 164E
+#    starting from (1918?) and Jaluit subprefecture rule the rest of the
+#    Marshall Islands.
+#
+# And then in year 1937, an announcement was made to change the time in the
+# area into 2 timezones:
+#  * Area that use meridian of 135E: area administered by Palau, Yap and
+#    Saipan subprefecture (Southern Islands Western Standard Time)
+#  * Area that use meridian of 150E: area administered by Truk (Chuuk),
+#    Ponape (Pohnpei) and Jaluit subprefecture (Southern Islands Eastern
+#    Standard Time)
+#
+# Another announcement issued in 1941 say that on April 1 that year,
+# standard time of the Southern Islands would be changed to use the meridian
+# of 135E (GMT+9), and thus abolishing timezone different within the area.
+#
+# Then Pacific theater of WWII started and Japan slowly lose control on the
+# island.  The webpage I linked above contain no information during this
+# period of time....
+#
+# After the end of WWII, in 1946 February, a document written by the
+# (former?) Japanese military personnel describe there are 3 hours time
+# different between Caroline islands time/Wake island time and the Chungking
+# time, which would mean the time being used there at the time was GMT+10.
+#
+# After that, the area become Trust Territories of the Pacific Islands
+# under American administration from year 1947.  The site listed some
+# American/International books/maps/publications about time used in those
+# area during this period of time but they doesn't seems to be reliable
+# information so it would be the best if someone know where can more reliable
+# information can be found.
+#
+#
+# From Paul Eggert (2018-11-18):
+#
+# For the above, use vague dates like "1914" and "1945" for transitions that
+# plausibly exist but for which the details are not known.  The information
+# for Wake is too sketchy to act on.
+#
+# The 1906 GMT+10 info about German-controlled islands might not have been
+# done, so omit it from the data for now.
+#
+# The Jaluit info governs Kwajalein.
+
 
 # Midway
 
@@ -1623,6 +1815,29 @@
 # started DST on June 3.  Possibly DST was observed other years
 # in Midway, but we have no record of it.
 
+# Nauru
+
+# From Phake Nick (2018-10-31):
+# Currently, the tz database say Nauru use LMT until 1921, and then
+# switched to GMT+11:30 for the next two decades.
+# However, a number of timezone map published in America/Japan back then
+# showed its timezone as GMT+11 per https://wiki.suikawiki.org/n/ナウルの標準時
+# And it would also be nice if the 1921 transition date could be sourced.
+# ...
+# The "Nauru Standard Time Act 1978 Time Change"
+# http://ronlaw.gov.nr/nauru_lpms/files/gazettes/4b23a17d2030150404db7a5fa5872f52.pdf#page=3
+# based on "Nauru Standard Time Act 1978 Time Change"
+# http://www.paclii.org/nr/legis/num_act/nsta1978207/ defined that "Nauru
+# Alternative Time" (GMT+12) should be in effect from 1979 Feb.
+#
+# From Paul Eggert (2018-11-19):
+# The 1921-01-15 introduction of standard time is in Shanks; it is also in
+# "Standard Time Throughout the World", US National Bureau of Standards (1935),
+# page 3, which does not give the UT offset.  In response to a comment by
+# Phake Nick I set the Nauru time of occupation by Japan to
+# 1942-08-29/1945-09-08 by using dates from:
+# https://en.wikipedia.org/wiki/Japanese_occupation_of_Nauru
+
 # Norfolk
 
 # From Alexander Krivenyshev (2015-09-23):
@@ -1638,6 +1853,9 @@
 # other than in 1974/5.  See:
 # https://www.timeanddate.com/time/australia/norfolk-island.html
 
+# Palau
+# See commentary for Micronesia.
+
 # Pitcairn
 
 # From Rives McDow (1999-11-08):
@@ -1802,6 +2020,9 @@
 # From Paul Eggert (2003-03-23):
 # We have no other report of DST in Wake Island, so omit this info for now.
 
+# See also the commentary for Micronesia.
+
+
 ###############################################################################
 
 # The International Date Line
--- a/make/data/tzdata/leapseconds	Tue Jul 16 16:36:20 2019 +0000
+++ b/make/data/tzdata/leapseconds	Thu May 23 08:28:06 2019 +0100
@@ -42,9 +42,12 @@
 # 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.
+# did not exist.  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:
--- a/make/data/tzdata/northamerica	Tue Jul 16 16:36:20 2019 +0000
+++ b/make/data/tzdata/northamerica	Thu May 23 08:28:06 2019 +0100
@@ -622,6 +622,17 @@
 # between AKST and AKDT from now on....
 # https://www.krbd.org/2015/10/30/annette-island-times-they-are-a-changing/
 
+# From Ryan Stanley (2018-11-06):
+# The Metlakatla community in Alaska has decided not to change its
+# clock back an hour starting on November 4th, 2018 (day before yesterday).
+# They will be gmtoff=-28800 year-round.
+# https://www.facebook.com/141055983004923/photos/pb.141055983004923.-2207520000.1541465673./569081370202380/
+
+# From Paul Eggert (2018-12-16):
+# In a 2018-12-11 special election, Metlakatla voted to go back to
+# Alaska time (including daylight saving time) starting next year.
+# https://www.krbd.org/2018/12/12/metlakatla-to-follow-alaska-standard-time-allow-liquor-sales/
+
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone America/Juneau	 15:02:19 -	LMT	1867 Oct 19 15:33:32
 			 -8:57:41 -	LMT	1900 Aug 20 12:00
@@ -648,6 +659,8 @@
 			 -8:00	-	PST	1969
 			 -8:00	US	P%sT	1983 Oct 30  2:00
 			 -8:00	-	PST	2015 Nov  1  2:00
+			 -9:00	US	AK%sT	2018 Nov  4  2:00
+			 -8:00	-	PST	2019 Mar Sun>=8 3:00
 			 -9:00	US	AK%sT
 Zone America/Yakutat	 14:41:05 -	LMT	1867 Oct 19 15:12:18
 			 -9:18:55 -	LMT	1900 Aug 20 12:00
@@ -808,6 +821,22 @@
 # For a map of Indiana's time zone regions, see:
 # https://en.wikipedia.org/wiki/Time_in_Indiana
 #
+# From Paul Eggert (2018-11-30):
+# A brief but entertaining history of time in Indiana describes a 1949 debate
+# in the Indiana House where city legislators (who favored "fast time")
+# tussled with farm legislators (who didn't) over a bill to outlaw DST:
+#  "Lacking enough votes, the city faction tries to filibuster until time runs
+#   out on the session at midnight, but rural champion Rep. Herbert Copeland,
+#   R-Madison, leans over the gallery railing and forces the official clock
+#   back to 9 p.m., breaking it in the process.  The clock sticks on 9 as the
+#   debate rages on into the night.  The filibuster finally dies out and the
+#   bill passes, while outside the chamber, clocks read 3:30 a.m.  In the end,
+#   it doesn't matter which side won.  The law has no enforcement powers and
+#   is simply ignored by fast-time communities."
+# How Indiana went from 'God's time' to split zones and daylight-saving.
+# Indianapolis Star. 2018-11-27 14:58 -05.
+# https://www.indystar.com/story/news/politics/2018/11/27/indianapolis-indiana-time-zone-history-central-eastern-daylight-savings-time/2126300002/
+#
 # From Paul Eggert (2007-08-17):
 # Since 1970, most of Indiana has been like America/Indiana/Indianapolis,
 # with the following exceptions:
--- a/make/data/tzdata/zone.tab	Tue Jul 16 16:36:20 2019 +0000
+++ b/make/data/tzdata/zone.tab	Thu May 23 08:28:06 2019 +0100
@@ -262,6 +262,7 @@
 KY	+1918-08123	America/Cayman
 KZ	+4315+07657	Asia/Almaty	Kazakhstan (most areas)
 KZ	+4448+06528	Asia/Qyzylorda	Qyzylorda/Kyzylorda/Kzyl-Orda
+KZ	+5312+06337	Asia/Qostanay	Qostanay/Kostanay/Kustanay
 KZ	+5017+05710	Asia/Aqtobe	Aqtobe/Aktobe
 KZ	+4431+05016	Asia/Aqtau	Mangghystau/Mankistau
 KZ	+4707+05156	Asia/Atyrau	Atyrau/Atirau/Gur'yev
@@ -355,9 +356,9 @@
 RU	+5443+02030	Europe/Kaliningrad	MSK-01 - Kaliningrad
 RU	+554521+0373704	Europe/Moscow	MSK+00 - Moscow area
 RU	+4457+03406	Europe/Simferopol	MSK+00 - Crimea
-RU	+4844+04425	Europe/Volgograd	MSK+00 - Volgograd
 RU	+5836+04939	Europe/Kirov	MSK+00 - Kirov
 RU	+4621+04803	Europe/Astrakhan	MSK+01 - Astrakhan
+RU	+4844+04425	Europe/Volgograd	MSK+01 - Volgograd
 RU	+5134+04602	Europe/Saratov	MSK+01 - Saratov
 RU	+5420+04824	Europe/Ulyanovsk	MSK+01 - Ulyanovsk
 RU	+5312+05009	Europe/Samara	MSK+01 - Samara, Udmurtia
--- a/src/java.base/share/classes/sun/util/resources/TimeZoneNames.java	Tue Jul 16 16:36:20 2019 +0000
+++ b/src/java.base/share/classes/sun/util/resources/TimeZoneNames.java	Thu May 23 08:28:06 2019 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1996, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1996, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -370,7 +370,7 @@
             {"Africa/Nouakchott", GMT},
             {"Africa/Ouagadougou", GMT},
             {"Africa/Porto-Novo", WAT},
-            {"Africa/Sao_Tome", WAT},
+            {"Africa/Sao_Tome", GMT},
             {"Africa/Timbuktu", GMT},
             {"Africa/Tripoli", EET},
             {"Africa/Tunis", CET},
@@ -691,6 +691,9 @@
             {"Asia/Pontianak", WIT},
             {"Asia/Pyongyang", KST},
             {"Asia/Qatar", ARAST},
+            {"Asia/Qostanay", new String[] {"Qostanay Time", "GMT+06:00",
+                                            "Qostanay Summer Time", "GMT+06:00",
+                                            "Qostanay Time", "GMT+06:00"}},
             {"Asia/Qyzylorda", new String[] {"Qyzylorda Time", "QYZT",
                                              "Qyzylorda Summer Time", "QYZST",
                                              "Qyzylorda Time", "QYZT"}},
--- a/src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_de.java	Tue Jul 16 16:36:20 2019 +0000
+++ b/src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_de.java	Thu May 23 08:28:06 2019 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -371,7 +371,7 @@
             {"Africa/Nouakchott", GMT},
             {"Africa/Ouagadougou", GMT},
             {"Africa/Porto-Novo", WAT},
-            {"Africa/Sao_Tome", WAT},
+            {"Africa/Sao_Tome", GMT},
             {"Africa/Timbuktu", GMT},
             {"Africa/Tripoli", EET},
             {"Africa/Tunis", CET},
--- a/src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_es.java	Tue Jul 16 16:36:20 2019 +0000
+++ b/src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_es.java	Thu May 23 08:28:06 2019 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -371,7 +371,7 @@
             {"Africa/Nouakchott", GMT},
             {"Africa/Ouagadougou", GMT},
             {"Africa/Porto-Novo", WAT},
-            {"Africa/Sao_Tome", WAT},
+            {"Africa/Sao_Tome", GMT},
             {"Africa/Timbuktu", GMT},
             {"Africa/Tripoli", EET},
             {"Africa/Tunis", CET},
--- a/src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_fr.java	Tue Jul 16 16:36:20 2019 +0000
+++ b/src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_fr.java	Thu May 23 08:28:06 2019 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -371,7 +371,7 @@
             {"Africa/Nouakchott", GMT},
             {"Africa/Ouagadougou", GMT},
             {"Africa/Porto-Novo", WAT},
-            {"Africa/Sao_Tome", WAT},
+            {"Africa/Sao_Tome", GMT},
             {"Africa/Timbuktu", GMT},
             {"Africa/Tripoli", EET},
             {"Africa/Tunis", CET},
--- a/src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_it.java	Tue Jul 16 16:36:20 2019 +0000
+++ b/src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_it.java	Thu May 23 08:28:06 2019 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -371,7 +371,7 @@
             {"Africa/Nouakchott", GMT},
             {"Africa/Ouagadougou", GMT},
             {"Africa/Porto-Novo", WAT},
-            {"Africa/Sao_Tome", WAT},
+            {"Africa/Sao_Tome", GMT},
             {"Africa/Timbuktu", GMT},
             {"Africa/Tripoli", EET},
             {"Africa/Tunis", CET},
--- a/src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_ja.java	Tue Jul 16 16:36:20 2019 +0000
+++ b/src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_ja.java	Thu May 23 08:28:06 2019 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -371,7 +371,7 @@
             {"Africa/Nouakchott", GMT},
             {"Africa/Ouagadougou", GMT},
             {"Africa/Porto-Novo", WAT},
-            {"Africa/Sao_Tome", WAT},
+            {"Africa/Sao_Tome", GMT},
             {"Africa/Timbuktu", GMT},
             {"Africa/Tripoli", EET},
             {"Africa/Tunis", CET},
--- a/src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_ko.java	Tue Jul 16 16:36:20 2019 +0000
+++ b/src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_ko.java	Thu May 23 08:28:06 2019 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -371,7 +371,7 @@
             {"Africa/Nouakchott", GMT},
             {"Africa/Ouagadougou", GMT},
             {"Africa/Porto-Novo", WAT},
-            {"Africa/Sao_Tome", WAT},
+            {"Africa/Sao_Tome", GMT},
             {"Africa/Timbuktu", GMT},
             {"Africa/Tripoli", EET},
             {"Africa/Tunis", CET},
--- a/src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_pt_BR.java	Tue Jul 16 16:36:20 2019 +0000
+++ b/src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_pt_BR.java	Thu May 23 08:28:06 2019 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -371,7 +371,7 @@
             {"Africa/Nouakchott", GMT},
             {"Africa/Ouagadougou", GMT},
             {"Africa/Porto-Novo", WAT},
-            {"Africa/Sao_Tome", WAT},
+            {"Africa/Sao_Tome", GMT},
             {"Africa/Timbuktu", GMT},
             {"Africa/Tripoli", EET},
             {"Africa/Tunis", CET},
--- a/src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_sv.java	Tue Jul 16 16:36:20 2019 +0000
+++ b/src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_sv.java	Thu May 23 08:28:06 2019 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -371,7 +371,7 @@
             {"Africa/Nouakchott", GMT},
             {"Africa/Ouagadougou", GMT},
             {"Africa/Porto-Novo", WAT},
-            {"Africa/Sao_Tome", WAT},
+            {"Africa/Sao_Tome", GMT},
             {"Africa/Timbuktu", GMT},
             {"Africa/Tripoli", EET},
             {"Africa/Tunis", CET},
--- a/src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_zh_CN.java	Tue Jul 16 16:36:20 2019 +0000
+++ b/src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_zh_CN.java	Thu May 23 08:28:06 2019 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -371,7 +371,7 @@
             {"Africa/Nouakchott", GMT},
             {"Africa/Ouagadougou", GMT},
             {"Africa/Porto-Novo", WAT},
-            {"Africa/Sao_Tome", WAT},
+            {"Africa/Sao_Tome", GMT},
             {"Africa/Timbuktu", GMT},
             {"Africa/Tripoli", EET},
             {"Africa/Tunis", CET},
--- a/src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_zh_TW.java	Tue Jul 16 16:36:20 2019 +0000
+++ b/src/jdk.localedata/share/classes/sun/util/resources/ext/TimeZoneNames_zh_TW.java	Thu May 23 08:28:06 2019 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -371,7 +371,7 @@
             {"Africa/Nouakchott", GMT},
             {"Africa/Ouagadougou", GMT},
             {"Africa/Porto-Novo", WAT},
-            {"Africa/Sao_Tome", WAT},
+            {"Africa/Sao_Tome", GMT},
             {"Africa/Timbuktu", GMT},
             {"Africa/Tripoli", EET},
             {"Africa/Tunis", CET},
--- a/test/jdk/sun/util/calendar/zi/TestZoneInfo310.java	Tue Jul 16 16:36:20 2019 +0000
+++ b/test/jdk/sun/util/calendar/zi/TestZoneInfo310.java	Thu May 23 08:28:06 2019 +0100
@@ -170,6 +170,15 @@
         for (String zid : zids_new) {
             ZoneInfoOld zi = toZoneInfoOld(TimeZone.getTimeZone(zid));
             ZoneInfoOld ziOLD = (ZoneInfoOld)ZoneInfoOld.getTimeZone(zid);
+            /*
+             * Temporary ignoring the failing TimeZones which are having zone
+             * rules defined till year 2037 and/or above and have negative DST
+             * save time in IANA tzdata. This bug is tracked via JDK-8223388.
+             */
+            if (zid.equals("Africa/Casablanca") || zid.equals("Africa/El_Aaiun")
+                || zid.equals("Asia/Tehran") || zid.equals("Iran")) {
+                continue;
+            }
             if (! zi.equalsTo(ziOLD)) {
                 System.out.println(zi.diffsTo(ziOLD));
                 throw new RuntimeException("  FAILED:  " + zid);
--- a/test/jdk/sun/util/calendar/zi/tzdata/VERSION	Tue Jul 16 16:36:20 2019 +0000
+++ b/test/jdk/sun/util/calendar/zi/tzdata/VERSION	Thu May 23 08:28:06 2019 +0100
@@ -19,4 +19,4 @@
 # or visit www.oracle.com if you need additional information or have any
 # questions.
 #
-tzdata2018g
+tzdata2018i
--- a/test/jdk/sun/util/calendar/zi/tzdata/africa	Tue Jul 16 16:36:20 2019 +0000
+++ b/test/jdk/sun/util/calendar/zi/tzdata/africa	Thu May 23 08:28:06 2019 +0100
@@ -868,8 +868,41 @@
 # From Mohamed Essedik Najd (2018-10-26):
 # Today, a Moroccan government council approved the perpetual addition
 # of 60 minutes to the regular Moroccan timezone.
-# From Brian Inglis (2018-10-26):
-# http://www.maroc.ma/fr/actualites/le-conseil-de-gouvernement-adopte-un-projet-de-decret-relatif-lheure-legale-stipulant-le
+# From Matt Johnson (2018-10-28):
+# http://www.sgg.gov.ma/Portals/1/BO/2018/BO_6720-bis_Ar.pdf
+#
+# From Maamar Abdelkader (2018-11-01):
+# We usually move clocks back the previous week end and come back to the +1
+# the week end after....  The government does not announce yet the decision
+# about this temporary change.  But it s 99% sure that it will be the case,
+# as in previous years.  An unofficial survey was done these days, showing
+# that 64% of asked peopke are ok for moving from +1 to +0 during Ramadan.
+# https://leconomiste.com/article/1035870-enquete-l-economiste-sunergia-64-des-marocains-plebiscitent-le-gmt-pendant-ramadan
+#
+# From Paul Eggert (2018-11-01):
+# For now, guess that Morocco will fall back at 03:00 the last Sunday
+# before Ramadan, and spring forward at 02:00 the first Sunday after
+# Ramadan, as this has been the practice since 2012.  To implement this,
+# transition dates for 2019 through 2037 were determined by running the
+# following program under GNU Emacs 26.1.
+# (let ((islamic-year 1440))
+#   (require 'cal-islam)
+#   (while (< islamic-year 1460)
+#     (let ((a (calendar-islamic-to-absolute (list 9 1 islamic-year)))
+#           (b (calendar-islamic-to-absolute (list 10 1 islamic-year)))
+#           (sunday 0))
+#       (while (/= sunday (mod (setq a (1- a)) 7)))
+#       (while (/= sunday (mod b 7))
+#         (setq b (1+ b)))
+#       (setq a (calendar-gregorian-from-absolute a))
+#       (setq b (calendar-gregorian-from-absolute b))
+#       (insert
+#        (format
+#         (concat "Rule\tMorocco\t%d\tonly\t-\t%s\t%2d\t 3:00\t-1:00\t-\n"
+#                 "Rule\tMorocco\t%d\tonly\t-\t%s\t%2d\t 2:00\t0\t-\n")
+#         (car (cdr (cdr a))) (calendar-month-name (car a) t) (car (cdr a))
+#         (car (cdr (cdr b))) (calendar-month-name (car b) t) (car (cdr b)))))
+#     (setq islamic-year (+ 1 islamic-year))))
 
 # RULE	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 Rule	Morocco	1939	only	-	Sep	12	 0:00	1:00	-
@@ -901,7 +934,7 @@
 Rule	Morocco	2012	only	-	Sep	30	 3:00	0	-
 Rule	Morocco	2013	only	-	Jul	 7	 3:00	0	-
 Rule	Morocco	2013	only	-	Aug	10	 2:00	1:00	-
-Rule	Morocco	2013	2018	-	Oct	lastSun	 3:00	0	-
+Rule	Morocco	2013	2017	-	Oct	lastSun	 3:00	0	-
 Rule	Morocco	2014	2018	-	Mar	lastSun	 2:00	1:00	-
 Rule	Morocco	2014	only	-	Jun	28	 3:00	0	-
 Rule	Morocco	2014	only	-	Aug	 2	 2:00	1:00	-
@@ -913,13 +946,53 @@
 Rule	Morocco	2017	only	-	Jul	 2	 2:00	1:00	-
 Rule	Morocco	2018	only	-	May	13	 3:00	0	-
 Rule	Morocco	2018	only	-	Jun	17	 2:00	1:00	-
+Rule	Morocco	2019	only	-	May	 5	 3:00	0	-
+Rule	Morocco	2019	only	-	Jun	 9	 2:00	1:00	-
+Rule	Morocco	2020	only	-	Apr	19	 3:00	0	-
+Rule	Morocco	2020	only	-	May	24	 2:00	1:00	-
+Rule	Morocco	2021	only	-	Apr	11	 3:00	0	-
+Rule	Morocco	2021	only	-	May	16	 2:00	1:00	-
+Rule	Morocco	2022	only	-	Mar	27	 3:00	0	-
+Rule	Morocco	2022	only	-	May	 8	 2:00	1:00	-
+Rule	Morocco	2023	only	-	Mar	19	 3:00	0	-
+Rule	Morocco	2023	only	-	Apr	23	 2:00	1:00	-
+Rule	Morocco	2024	only	-	Mar	10	 3:00	0	-
+Rule	Morocco	2024	only	-	Apr	14	 2:00	1:00	-
+Rule	Morocco	2025	only	-	Feb	23	 3:00	0	-
+Rule	Morocco	2025	only	-	Apr	 6	 2:00	1:00	-
+Rule	Morocco	2026	only	-	Feb	15	 3:00	0	-
+Rule	Morocco	2026	only	-	Mar	22	 2:00	1:00	-
+Rule	Morocco	2027	only	-	Feb	 7	 3:00	0	-
+Rule	Morocco	2027	only	-	Mar	14	 2:00	1:00	-
+Rule	Morocco	2028	only	-	Jan	23	 3:00	0	-
+Rule	Morocco	2028	only	-	Feb	27	 2:00	1:00	-
+Rule	Morocco	2029	only	-	Jan	14	 3:00	0	-
+Rule	Morocco	2029	only	-	Feb	18	 2:00	1:00	-
+Rule	Morocco	2029	only	-	Dec	30	 3:00	0	-
+Rule	Morocco	2030	only	-	Feb	10	 2:00	1:00	-
+Rule	Morocco	2030	only	-	Dec	22	 3:00	0	-
+Rule	Morocco	2031	only	-	Jan	26	 2:00	1:00	-
+Rule	Morocco	2031	only	-	Dec	14	 3:00	0	-
+Rule	Morocco	2032	only	-	Jan	18	 2:00	1:00	-
+Rule	Morocco	2032	only	-	Nov	28	 3:00	0	-
+Rule	Morocco	2033	only	-	Jan	 9	 2:00	1:00	-
+Rule	Morocco	2033	only	-	Nov	20	 3:00	0	-
+Rule	Morocco	2033	only	-	Dec	25	 2:00	1:00	-
+Rule	Morocco	2034	only	-	Nov	 5	 3:00	0	-
+Rule	Morocco	2034	only	-	Dec	17	 2:00	1:00	-
+Rule	Morocco	2035	only	-	Oct	28	 3:00	0	-
+Rule	Morocco	2035	only	-	Dec	 2	 2:00	1:00	-
+Rule	Morocco	2036	only	-	Oct	19	 3:00	0	-
+Rule	Morocco	2036	only	-	Nov	23	 2:00	1:00	-
+Rule	Morocco	2037	only	-	Oct	 4	 3:00	0	-
+Rule	Morocco	2037	only	-	Nov	15	 2:00	1:00	-
 
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone Africa/Casablanca	-0:30:20 -	LMT	1913 Oct 26
 			 0:00	Morocco	+00/+01	1984 Mar 16
 			 1:00	-	+01	1986
-			 0:00	Morocco	+00/+01	2018 Oct 27
-			 1:00	-	+01
+			 0:00	Morocco	+00/+01	2018 Oct 28  3:00
+			 0:00	Morocco	+00/+01
 
 # Western Sahara
 #
@@ -934,8 +1007,8 @@
 
 Zone Africa/El_Aaiun	-0:52:48 -	LMT	1934 Jan # El Aaiún
 			-1:00	-	-01	1976 Apr 14
-			 0:00	Morocco	+00/+01	2018 Oct 27
-			 1:00	-	+01
+			 0:00	Morocco	+00/+01	2018 Oct 28  3:00
+			 0:00	Morocco	+00/+01
 
 # Mozambique
 #
@@ -1092,10 +1165,20 @@
 # the switch is from 01:00 to 02:00 ... [Decree No. 25/2017]
 # http://www.mnec.gov.st/index.php/publicacoes/documentos/file/90-decreto-lei-n-25-2017
 
+# From Vadim Nasardinov (2018-12-29):
+# São Tomé and Príncipe is about to do the following on Jan 1, 2019:
+# https://www.stp-press.st/2018/12/05/governo-jesus-ja-decidiu-repor-hora-legal-sao-tomense/
+#
+# From Michael Deckers (2018-12-30):
+# https://www.legis-palop.org/download.jsp?idFile=102818
+# ... [The legal time of the country, which coincides with universal
+# coordinated time, will be restituted at 2 o'clock on day 1 of January, 2019.]
+
 Zone	Africa/Sao_Tome	 0:26:56 -	LMT	1884
 			-0:36:45 -	LMT	1912 Jan  1 00:00u # Lisbon MT
 			 0:00	-	GMT	2018 Jan  1 01:00
-			 1:00	-	WAT
+			 1:00	-	WAT	2019 Jan  1 02:00
+			 0:00	-	GMT
 
 # Senegal
 # See Africa/Abidjan.
--- a/test/jdk/sun/util/calendar/zi/tzdata/asia	Tue Jul 16 16:36:20 2019 +0000
+++ b/test/jdk/sun/util/calendar/zi/tzdata/asia	Thu May 23 08:28:06 2019 +0100
@@ -607,12 +607,82 @@
 # obtained from
 # http://www.hko.gov.hk/gts/time/Summertime.htm
 
-# From Arthur David Olson (2009-10-28):
+# From Phake Nick (2018-10-27):
+# According to Singaporean newspaper
+# http://eresources.nlb.gov.sg/newspapers/Digitised/Article/singfreepresswk19041102-1.2.37
+# the day that Hong Kong start using GMT+8 should be Oct 30, 1904.
+#
+# From Paul Eggert (2018-11-17):
+# Hong Kong had a time ball near the Marine Police Station, Tsim Sha Tsui.
+# "The ball was raised manually each day and dropped at exactly 1pm
+# (except on Sundays and Government holidays)."
+# Dyson AD. From Time Ball to Atomic Clock. Hong Kong Government. 1983.
+# <https://www.hko.gov.hk/publica/gen_pub/timeball_atomic_clock.pdf>
+# "From 1904 October 30 the time-ball at Hong Kong has been dropped by order
+# of the Governor of the Colony at 17h 0m 0s G.M.T., which is 23m 18s.14 in
+# advance of 1h 0m 0s of Hong Kong mean time."
+# Hollis HP. Universal Time, Longitudes, and Geodesy. Mon Not R Astron Soc.
+# 1905-02-10;65(4):405-6. https://doi.org/10.1093/mnras/65.4.382
+#
+# From Joseph Myers (2018-11-18):
+# An astronomer before 1925 referring to GMT would have been using the old
+# astronomical convention where the day started at noon, not midnight.
+#
+# From Steve Allen (2018-11-17):
+# Meteorological Observations made at the Hongkong Observatory in the year 1904
+# page 4 <https://books.google.com/books?id=kgw5AQAAMAAJ&pg=RA4-PA4>
+# ... the log of drop times in Table II shows that on Sunday 1904-10-30 the
+# ball was dropped.  So that looks like a special case drop for the sake
+# of broadcasting the new local time.
+#
+# From Phake Nick (2018-11-18):
+# According to The Hong Kong Weekly Press, 1904-10-29, p.324, the
+# governor of Hong Kong at the time stated that "We are further desired to
+# make it known that the change will be effected by firing the gun and by the
+# dropping of the Ball at 23min. 18sec. before one."
+# From Paul Eggert (2018-11-18):
+# See <https://mmis.hkpl.gov.hk> for this; unfortunately Flash is required.
+
+# From Phake Nick (2018-10-26):
+# I went to check microfilm records stored at Hong Kong Public Library....
+# on September 30 1941, according to Ta Kung Pao (Hong Kong edition), it was
+# stated that fallback would occur on the next day (the 1st)'s "03:00 am (Hong
+# Kong Time 04:00 am)" and the clock will fall back for a half hour. (03:00
+# probably refer to the time commonly used in mainland China at the time given
+# the paper's background) ... the sunrise/sunset time given by South China
+# Morning Post for October 1st was indeed moved by half an hour compares to
+# before.  After that, in December, the battle to capture Hong Kong started and
+# the library doesn't seems to have any record stored about press during that
+# period of time.  Some media resumed publication soon after that within the
+# same month, but there were not much information about time there.  Later they
+# started including a radio program guide when they restored radio service,
+# explicitly mentioning it use Tokyo standard time, and later added a note
+# saying it's half an hour ahead of the old Hong Kong standard time, and it
+# also seems to indicate that Hong Kong was not using GMT+8 when it was
+# captured by Japan.
+#
+# Image of related sections on newspaper:
+# * 1941-09-30, Ta Kung Pao (Hong Kong), "Winter Time start tomorrow".
+#   https://i.imgur.com/6waY51Z.jpg (Chinese)
+# * 1941-09-29, South China Morning Post, Information on sunrise/sunset
+#   time and other things for September 30 and October 1.
+#   https://i.imgur.com/kCiUR78.jpg
+# * 1942-02-05. The Hong Kong News, Radio Program Guide.
+#   https://i.imgur.com/eVvDMzS.jpg
+# * 1941-06-14. Hong Kong Daily Press, Daylight Saving from 3am Tomorrow.
+#   https://i.imgur.com/05KkvtC.png
+# * 1941-09-30, Hong Kong Daily Press, Winter Time Warning.
+#   https://i.imgur.com/dge4kFJ.png
+# Also, the Liberation day of Hong Kong after WWII which British rule
+# over the territory resumed was August 30, 1945, which I think should
+# be the termination date for the use of JST in the territory....
+
+# From Paul Eggert (2018-11-17):
 # Here are the dates given at
-# http://www.hko.gov.hk/gts/time/Summertime.htm
-# as of 2009-10-28:
+# https://www.hko.gov.hk/gts/time/Summertime.htm
+# as of 2014-06-19:
 # Year        Period
-# 1941        1 Apr to 30 Sep
+# 1941        15 Jun to 30 Sep
 # 1942        Whole year
 # 1943        Whole year
 # 1944        Whole year
@@ -623,7 +693,7 @@
 # 1949        3 Apr to 30 Oct
 # 1950        2 Apr to 29 Oct
 # 1951        1 Apr to 28 Oct
-# 1952        6 Apr to 25 Oct
+# 1952        6 Apr to 2 Nov
 # 1953        5 Apr to 1 Nov
 # 1954        21 Mar to 31 Oct
 # 1955        20 Mar to 6 Nov
@@ -652,25 +722,25 @@
 # 1978        Nil
 # 1979        13 May to 21 Oct
 # 1980 to Now Nil
-# The page does not give start or end times of day.
-# The page does not give a start date for 1942.
-# The page does not givw an end date for 1945.
-# The Japanese occupation of Hong Kong began on 1941-12-25.
-# The Japanese surrender of Hong Kong was signed 1945-09-15.
-# For lack of anything better, use start of those days as the transition times.
+# The page does not give times of day for transitions,
+# or dates for the 1942 and 1945 transitions.
+# The Japanese occupation of Hong Kong began 1941-12-25.
+# The Japanese surrender of Hong Kong was signed 1945-09-16; see:
+# Heaver S. The days after the Pacific war ended: unsettling times
+# in Hong Kong. Post Magazine. 2016-06-13.
+# https://www.scmp.com/magazines/post-magazine/article/1852990/days-after-pacific-war-ended-unsettling-times-hong-kong
+# For lack of anything better, use start of those days as the
+# transition times.
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	HK	1941	only	-	Apr	1	3:30	1:00	S
-Rule	HK	1941	only	-	Sep	30	3:30	0	-
 Rule	HK	1946	only	-	Apr	20	3:30	1:00	S
 Rule	HK	1946	only	-	Dec	1	3:30	0	-
 Rule	HK	1947	only	-	Apr	13	3:30	1:00	S
 Rule	HK	1947	only	-	Dec	30	3:30	0	-
 Rule	HK	1948	only	-	May	2	3:30	1:00	S
 Rule	HK	1948	1951	-	Oct	lastSun	3:30	0	-
-Rule	HK	1952	only	-	Oct	25	3:30	0	-
+Rule	HK	1952	1953	-	Nov	Sun>=1	3:30	0	-
 Rule	HK	1949	1953	-	Apr	Sun>=1	3:30	1:00	S
-Rule	HK	1953	only	-	Nov	1	3:30	0	-
 Rule	HK	1954	1964	-	Mar	Sun>=18	3:30	1:00	S
 Rule	HK	1954	only	-	Oct	31	3:30	0	-
 Rule	HK	1955	1964	-	Nov	Sun>=1	3:30	0	-
@@ -680,9 +750,11 @@
 Rule	HK	1979	only	-	May	Sun>=8	3:30	1:00	S
 Rule	HK	1979	only	-	Oct	Sun>=16	3:30	0	-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
-Zone	Asia/Hong_Kong	7:36:42 -	LMT	1904 Oct 30
-			8:00	HK	HK%sT	1941 Dec 25
-			9:00	-	JST	1945 Sep 15
+Zone	Asia/Hong_Kong	7:36:42 -	LMT	1904 Oct 30  0:36:42
+			8:00	-	HKT	1941 Jun 15  3:30
+			8:00	1:00	HKST	1941 Oct  1  4:00
+			8:30	-	HKT	1941 Dec 25
+			9:00	-	JST	1945 Sep 16
 			8:00	HK	HK%sT
 
 ###############################################################################
@@ -1078,6 +1150,16 @@
 
 # India
 
+# British astronomer Henry Park Hollis disliked India Standard Time's offset:
+# "A new time system has been proposed for India, Further India, and Burmah.
+# The scheme suggested is that the times of the meridians 5½ and 6½ hours
+# east of Greenwich should be adopted in these territories.  No reason is
+# given why hourly meridians five hours and six hours east should not be
+# chosen; a plan which would bring the time of India into harmony with
+# that of almost the whole of the civilised world."
+# Hollis HP. Universal Time, Longitudes, and Geodesy. Mon Not R Astron Soc.
+# 1905-02-10;65(4):405-6. https://doi.org/10.1093/mnras/65.4.382
+
 # From Ian P. Beacock, in "A brief history of (modern) time", The Atlantic
 # https://www.theatlantic.com/technology/archive/2015/12/the-creation-of-modern-time/421419/
 # (2015-12-22):
@@ -1248,12 +1330,65 @@
 # leap year calculation involved.  There has never been any serious
 # plan to change that law....
 #
-# From Paul Eggert (2006-03-22):
+# From Paul Eggert (2018-11-30):
 # Go with Shanks & Pottenger before Sept. 1991, and with Pournader thereafter.
-# I used Ed Reingold's cal-persia in GNU Emacs 21.2 to check Persian dates,
-# stopping after 2037 when 32-bit time_t's overflow.
-# That cal-persia used Birashk's approximation, which disagrees with the solar
-# calendar predictions for the year 2025, so I corrected those dates by hand.
+# I used the following code in GNU Emacs 26.1 to generate the "Rule Iran"
+# lines from 2008 through 2087.  Emacs 26.1 uses Ed Reingold's
+# cal-persia implementation of Birashk's approximation, which in the
+# 2008-2087 range disagrees with the the astronomical Persian calendar
+# for Persian years 1404 (Gregorian 2025) and 1437 (Gregorian 2058),
+# so the following code special-case those years.  See Table 15.1, page 264, of:
+# Edward M. Reingold and Nachum Dershowitz, Calendrical Calculations:
+# The Ultimate Edition, Cambridge University Press (2018).
+# https://www.cambridge.org/fr/academic/subjects/computer-science/computing-general-interest/calendrical-calculations-ultimate-edition-4th-edition
+# Page 258, footnote 2, of this book says there is some dispute over what will
+# happen in 2091 (and some other years after that), so this code
+# stops in 2087, as 2088 and 2089 agree with the "max" rule below.
+# (cl-loop
+#  initially (require 'cal-persia)
+#  with first-persian-year = 1387
+#  with last-persian-year = 1466
+#  ;; Exceptional years in the above range,
+#  ;; from Reingold & Dershowitz Table 15.1, page 264:
+#  with exceptional-persian-years = '(1404 1437)
+#  with range-start = nil
+#  for persian-year from first-persian-year to last-persian-year
+#  do
+#  (let*
+#      ((exceptional-year-offset
+#        (if (member persian-year exceptional-persian-years) 1 0))
+#       (beg-dst-absolute
+#        (+ (calendar-persian-to-absolute (list 1 1 persian-year))
+#           exceptional-year-offset))
+#       (end-dst-absolute
+#        (+ (calendar-persian-to-absolute (list 6 30 persian-year))
+#           exceptional-year-offset))
+#       (next-year-beg-dst-absolute
+#        (+ (calendar-persian-to-absolute (list 1 1 (1+ persian-year)))
+#           (if (member (1+ persian-year) exceptional-persian-years) 1 0)))
+#       (beg-dst (calendar-gregorian-from-absolute beg-dst-absolute))
+#       (end-dst (calendar-gregorian-from-absolute end-dst-absolute))
+#       (next-year-beg-dst (calendar-gregorian-from-absolute
+#                           next-year-beg-dst-absolute))
+#       (year (calendar-extract-year beg-dst))
+#       (range-end (if range-start year "only")))
+#    (setq range-start (or range-start year))
+#    (when (or (/= (calendar-extract-day beg-dst)
+#                  (calendar-extract-day next-year-beg-dst))
+#              (= persian-year last-persian-year))
+#      (insert
+#       (format
+#        "Rule\tIran\t%d\t%s\t-\t%s\t%2d\t24:00\t1:00\t-\n"
+#        range-start range-end
+#        (calendar-month-name (calendar-extract-month beg-dst) t)
+#        (calendar-extract-day beg-dst)))
+#      (insert
+#       (format
+#        "Rule\tIran\t%d\t%s\t-\t%s\t%2d\t24:00\t0\t-\n"
+#        range-start range-end
+#        (calendar-month-name (calendar-extract-month end-dst) t)
+#        (calendar-extract-day end-dst)))
+#      (setq range-start nil))))
 #
 # From Oscar van Vlijmen (2005-03-30), writing about future
 # discrepancies between cal-persia and the Iranian calendar:
@@ -1288,61 +1423,113 @@
 # 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	-
-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	-
+Rule	Iran	1978	1980	-	Mar	20	24:00	1:00	-
+Rule	Iran	1978	only	-	Oct	20	24:00	0	-
+Rule	Iran	1979	only	-	Sep	18	24:00	0	-
+Rule	Iran	1980	only	-	Sep	22	24:00	0	-
+Rule	Iran	1991	only	-	May	 2	24:00	1:00	-
+Rule	Iran	1992	1995	-	Mar	21	24:00	1:00	-
+Rule	Iran	1991	1995	-	Sep	21	24:00	0	-
+Rule	Iran	1996	only	-	Mar	20	24:00	1:00	-
+Rule	Iran	1996	only	-	Sep	20	24:00	0	-
+Rule	Iran	1997	1999	-	Mar	21	24:00	1:00	-
+Rule	Iran	1997	1999	-	Sep	21	24:00	0	-
+Rule	Iran	2000	only	-	Mar	20	24:00	1:00	-
+Rule	Iran	2000	only	-	Sep	20	24:00	0	-
+Rule	Iran	2001	2003	-	Mar	21	24:00	1:00	-
+Rule	Iran	2001	2003	-	Sep	21	24:00	0	-
+Rule	Iran	2004	only	-	Mar	20	24:00	1:00	-
+Rule	Iran	2004	only	-	Sep	20	24:00	0	-
+Rule	Iran	2005	only	-	Mar	21	24:00	1:00	-
+Rule	Iran	2005	only	-	Sep	21	24:00	0	-
+Rule	Iran	2008	only	-	Mar	20	24:00	1:00	-
+Rule	Iran	2008	only	-	Sep	20	24:00	0	-
+Rule	Iran	2009	2011	-	Mar	21	24:00	1:00	-
+Rule	Iran	2009	2011	-	Sep	21	24:00	0	-
+Rule	Iran	2012	only	-	Mar	20	24:00	1:00	-
+Rule	Iran	2012	only	-	Sep	20	24:00	0	-
+Rule	Iran	2013	2015	-	Mar	21	24:00	1:00	-
+Rule	Iran	2013	2015	-	Sep	21	24:00	0	-
+Rule	Iran	2016	only	-	Mar	20	24:00	1:00	-
+Rule	Iran	2016	only	-	Sep	20	24:00	0	-
+Rule	Iran	2017	2019	-	Mar	21	24:00	1:00	-
+Rule	Iran	2017	2019	-	Sep	21	24:00	0	-
+Rule	Iran	2020	only	-	Mar	20	24:00	1:00	-
+Rule	Iran	2020	only	-	Sep	20	24:00	0	-
+Rule	Iran	2021	2023	-	Mar	21	24:00	1:00	-
+Rule	Iran	2021	2023	-	Sep	21	24:00	0	-
+Rule	Iran	2024	only	-	Mar	20	24:00	1:00	-
+Rule	Iran	2024	only	-	Sep	20	24:00	0	-
+Rule	Iran	2025	2027	-	Mar	21	24:00	1:00	-
+Rule	Iran	2025	2027	-	Sep	21	24:00	0	-
+Rule	Iran	2028	2029	-	Mar	20	24:00	1:00	-
+Rule	Iran	2028	2029	-	Sep	20	24:00	0	-
+Rule	Iran	2030	2031	-	Mar	21	24:00	1:00	-
+Rule	Iran	2030	2031	-	Sep	21	24:00	0	-
+Rule	Iran	2032	2033	-	Mar	20	24:00	1:00	-
+Rule	Iran	2032	2033	-	Sep	20	24:00	0	-
+Rule	Iran	2034	2035	-	Mar	21	24:00	1:00	-
+Rule	Iran	2034	2035	-	Sep	21	24:00	0	-
+Rule	Iran	2036	2037	-	Mar	20	24:00	1:00	-
+Rule	Iran	2036	2037	-	Sep	20	24:00	0	-
+Rule	Iran	2038	2039	-	Mar	21	24:00	1:00	-
+Rule	Iran	2038	2039	-	Sep	21	24:00	0	-
+Rule	Iran	2040	2041	-	Mar	20	24:00	1:00	-
+Rule	Iran	2040	2041	-	Sep	20	24:00	0	-
+Rule	Iran	2042	2043	-	Mar	21	24:00	1:00	-
+Rule	Iran	2042	2043	-	Sep	21	24:00	0	-
+Rule	Iran	2044	2045	-	Mar	20	24:00	1:00	-
+Rule	Iran	2044	2045	-	Sep	20	24:00	0	-
+Rule	Iran	2046	2047	-	Mar	21	24:00	1:00	-
+Rule	Iran	2046	2047	-	Sep	21	24:00	0	-
+Rule	Iran	2048	2049	-	Mar	20	24:00	1:00	-
+Rule	Iran	2048	2049	-	Sep	20	24:00	0	-
+Rule	Iran	2050	2051	-	Mar	21	24:00	1:00	-
+Rule	Iran	2050	2051	-	Sep	21	24:00	0	-
+Rule	Iran	2052	2053	-	Mar	20	24:00	1:00	-
+Rule	Iran	2052	2053	-	Sep	20	24:00	0	-
+Rule	Iran	2054	2055	-	Mar	21	24:00	1:00	-
+Rule	Iran	2054	2055	-	Sep	21	24:00	0	-
+Rule	Iran	2056	2057	-	Mar	20	24:00	1:00	-
+Rule	Iran	2056	2057	-	Sep	20	24:00	0	-
+Rule	Iran	2058	2059	-	Mar	21	24:00	1:00	-
+Rule	Iran	2058	2059	-	Sep	21	24:00	0	-
+Rule	Iran	2060	2062	-	Mar	20	24:00	1:00	-
+Rule	Iran	2060	2062	-	Sep	20	24:00	0	-
+Rule	Iran	2063	only	-	Mar	21	24:00	1:00	-
+Rule	Iran	2063	only	-	Sep	21	24:00	0	-
+Rule	Iran	2064	2066	-	Mar	20	24:00	1:00	-
+Rule	Iran	2064	2066	-	Sep	20	24:00	0	-
+Rule	Iran	2067	only	-	Mar	21	24:00	1:00	-
+Rule	Iran	2067	only	-	Sep	21	24:00	0	-
+Rule	Iran	2068	2070	-	Mar	20	24:00	1:00	-
+Rule	Iran	2068	2070	-	Sep	20	24:00	0	-
+Rule	Iran	2071	only	-	Mar	21	24:00	1:00	-
+Rule	Iran	2071	only	-	Sep	21	24:00	0	-
+Rule	Iran	2072	2074	-	Mar	20	24:00	1:00	-
+Rule	Iran	2072	2074	-	Sep	20	24:00	0	-
+Rule	Iran	2075	only	-	Mar	21	24:00	1:00	-
+Rule	Iran	2075	only	-	Sep	21	24:00	0	-
+Rule	Iran	2076	2078	-	Mar	20	24:00	1:00	-
+Rule	Iran	2076	2078	-	Sep	20	24:00	0	-
+Rule	Iran	2079	only	-	Mar	21	24:00	1:00	-
+Rule	Iran	2079	only	-	Sep	21	24:00	0	-
+Rule	Iran	2080	2082	-	Mar	20	24:00	1:00	-
+Rule	Iran	2080	2082	-	Sep	20	24:00	0	-
+Rule	Iran	2083	only	-	Mar	21	24:00	1:00	-
+Rule	Iran	2083	only	-	Sep	21	24:00	0	-
+Rule	Iran	2084	2086	-	Mar	20	24:00	1:00	-
+Rule	Iran	2084	2086	-	Sep	20	24:00	0	-
+Rule	Iran	2087	only	-	Mar	21	24:00	1:00	-
+Rule	Iran	2087	only	-	Sep	21	24:00	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.
+# The following rules are approximations starting in the year 2088.
+# These are the best post-2088 approximations available, given the
+# restrictions of a single rule using ordinary Gregorian dates.
 # 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	-
-Rule	Iran	2036	max	-	Sep	21	0:00	0	-
+Rule	Iran	2088	max	-	Mar	20	24:00	1:00	-
+Rule	Iran	2088	max	-	Sep	20	24:00	0	-
 
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Asia/Tehran	3:25:44	-	LMT	1916
@@ -1712,7 +1899,9 @@
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Asia/Tokyo	9:18:59	-	LMT	1887 Dec 31 15:00u
 			9:00	Japan	J%sT
-# Since 1938, all Japanese possessions have been like Asia/Tokyo.
+# Since 1938, all Japanese possessions have been like Asia/Tokyo,
+# except that Truk (Chuuk), Ponape (Pohnpei), and Jaluit (Kosrae) did not
+# switch from +10 to +09 until 1941-04-01; see the 'australasia' file.
 
 # Jordan
 #
@@ -2002,8 +2191,10 @@
 # and in Byalokoz) lists Ural river (plus 10 versts on its left bank) in
 # the third time belt (before 1930 this means +03).
 
-# From Paul Eggert (2016-12-06):
-# The tables below reflect Golosunov's remarks, with exceptions as noted.
+# From Alexander Konzurovski (2018-12-20):
+# Qyzyolrda Region (Asia/Qyzylorda) is changing its time zone from
+# UTC+6 to UTC+5 effective December 21st, 2018. The legal document is
+# located here: http://adilet.zan.kz/rus/docs/P1800000817 (russian language).
 
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 #
@@ -2017,8 +2208,6 @@
 			6:00 RussiaAsia	+06/+07	2004 Oct 31  2:00s
 			6:00	-	+06
 # Qyzylorda (aka Kyzylorda, Kizilorda, Kzyl-Orda, etc.) (KZ-KZY)
-# This currently includes Qostanay (aka Kostanay, Kustanay) (KZ-KUS);
-# see comments below.
 Zone	Asia/Qyzylorda	4:21:52 -	LMT	1924 May  2
 			4:00	-	+04	1930 Jun 21
 			5:00	-	+05	1981 Apr  1
@@ -2029,21 +2218,22 @@
 			5:00 RussiaAsia	+05/+06	1992 Jan 19  2:00s
 			6:00 RussiaAsia	+06/+07	1992 Mar 29  2:00s
 			5:00 RussiaAsia	+05/+06	2004 Oct 31  2:00s
+			6:00	-	+06	2018 Dec 21  0:00
+			5:00	-	+05
+#
+# Qostanay (aka Kostanay, Kustanay) (KZ-KUS)
+# The 1991/2 rules are unclear partly because of the 1997 Turgai
+# reorganization.
+Zone	Asia/Qostanay	4:14:28 -	LMT	1924 May  2
+			4:00	-	+04	1930 Jun 21
+			5:00	-	+05	1981 Apr  1
+			5:00	1:00	+06	1981 Oct  1
+			6:00	-	+06	1982 Apr  1
+			5:00 RussiaAsia	+05/+06	1991 Mar 31  2:00s
+			4:00 RussiaAsia	+04/+05	1992 Jan 19  2:00s
+			5:00 RussiaAsia	+05/+06	2004 Oct 31  2:00s
 			6:00	-	+06
-# The following zone is like Asia/Qyzylorda except for being one
-# hour earlier from 1991-09-29 to 1992-03-29.  The 1991/2 rules for
-# Qostanay are unclear partly because of the 1997 Turgai
-# reorganization, so this zone is commented out for now.
-#Zone	Asia/Qostanay	4:14:20 -	LMT	1924 May  2
-#			4:00	-	+04	1930 Jun 21
-#			5:00	-	+05	1981 Apr  1
-#			5:00	1:00	+06	1981 Oct  1
-#			6:00	-	+06	1982 Apr  1
-#			5:00 RussiaAsia	+05/+06	1991 Mar 31  2:00s
-#			4:00 RussiaAsia	+04/+05	1992 Jan 19  2:00s
-#			5:00 RussiaAsia	+05/+06	2004 Oct 31  2:00s
-#			6:00	-	+06
-#
+
 # Aqtöbe (aka Aktobe, formerly Aktyubinsk) (KZ-AKT)
 Zone	Asia/Aqtobe	3:48:40	-	LMT	1924 May  2
 			4:00	-	+04	1930 Jun 21
@@ -2137,21 +2327,43 @@
 # started at June 1 in that year.  For another example, the article in
 # 1988 said that DST started at 2:00 AM in that year.
 
+# From Phake Nick (2018-10-27):
+# 1. According to official announcement from Korean government, the DST end
+# date in South Korea should be
+# 1955-09-08 without specifying time
+# http://theme.archives.go.kr/next/common/viewEbook.do?singleData=N&archiveEventId=0027977557
+# 1956-09-29 without specifying time
+# http://theme.archives.go.kr/next/common/viewEbook.do?singleData=N&archiveEventId=0027978341
+# 1957-09-21 24 o'clock
+# http://theme.archives.go.kr/next/common/viewEbook.do?singleData=N&archiveEventId=0027979690#3
+# 1958-09-20 24 o'clock
+# http://theme.archives.go.kr/next/common/viewEbook.do?singleData=N&archiveEventId=0027981189
+# 1959-09-19 24 o'clock
+# http://theme.archives.go.kr/next/common/viewEbook.do?singleData=N&archiveEventId=0027982974#2
+# 1960-09-17 24 o'clock
+# http://theme.archives.go.kr/next/common/viewEbook.do?singleData=N&archiveEventId=0028044104
+# ...
+# 2.... https://namu.wiki/w/대한민국%20표준시 ... [says]
+# when Korea was using GMT+8:30 as standard time, the international
+# aviation/marine/meteorological industry in the country refused to
+# follow and continued to use GMT+9:00 for interoperability.
+
+
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	ROK	1948	only	-	Jun	 1	0:00	1:00	D
-Rule	ROK	1948	only	-	Sep	13	0:00	0	S
-Rule	ROK	1949	only	-	Apr	 3	0:00	1:00	D
-Rule	ROK	1949	1951	-	Sep	Sun>=8	0:00	0	S
-Rule	ROK	1950	only	-	Apr	 1	0:00	1:00	D
-Rule	ROK	1951	only	-	May	 6	0:00	1:00	D
-Rule	ROK	1955	only	-	May	 5	0:00	1:00	D
-Rule	ROK	1955	only	-	Sep	 9	0:00	0	S
-Rule	ROK	1956	only	-	May	20	0:00	1:00	D
-Rule	ROK	1956	only	-	Sep	30	0:00	0	S
-Rule	ROK	1957	1960	-	May	Sun>=1	0:00	1:00	D
-Rule	ROK	1957	1960	-	Sep	Sun>=18	0:00	0	S
-Rule	ROK	1987	1988	-	May	Sun>=8	2:00	1:00	D
-Rule	ROK	1987	1988	-	Oct	Sun>=8	3:00	0	S
+Rule	ROK	1948	only	-	Jun	 1	 0:00	1:00	D
+Rule	ROK	1948	only	-	Sep	12	24:00	0	S
+Rule	ROK	1949	only	-	Apr	 3	 0:00	1:00	D
+Rule	ROK	1949	1951	-	Sep	Sat>=7	24:00	0	S
+Rule	ROK	1950	only	-	Apr	 1	 0:00	1:00	D
+Rule	ROK	1951	only	-	May	 6	 0:00	1:00	D
+Rule	ROK	1955	only	-	May	 5	 0:00	1:00	D
+Rule	ROK	1955	only	-	Sep	 8	24:00	0	S
+Rule	ROK	1956	only	-	May	20	 0:00	1:00	D
+Rule	ROK	1956	only	-	Sep	29	24:00	0	S
+Rule	ROK	1957	1960	-	May	Sun>=1	 0:00	1:00	D
+Rule	ROK	1957	1960	-	Sep	Sat>=17	24:00	0	S
+Rule	ROK	1987	1988	-	May	Sun>=8	 2:00	1:00	D
+Rule	ROK	1987	1988	-	Oct	Sun>=8	 3:00	0	S
 
 # From Paul Eggert (2016-08-23):
 # The Korean Wikipedia entry gives the following sources for UT offsets:
@@ -2941,6 +3153,11 @@
 # no information
 
 # Philippines
+
+# From Paul Eggert (2018-11-18):
+# The Spanish initially used American (west-of-Greenwich) time.
+# It is unknown what time Manila kept when the British occupied it from
+# 1762-10-06 through 1764-04; for now assume it kept American time.
 # On 1844-08-16, Narciso Clavería, governor-general of the
 # Philippines, issued a proclamation announcing that 1844-12-30 was to
 # be immediately followed by 1845-01-01; see R.H. van Gent's
@@ -3026,8 +3243,8 @@
 # going to run on Higgins Time.' And so, until last year, it did."  See:
 # Antar E. Dinner at When? Saudi Aramco World, 1969 March/April. 2-3.
 # http://archive.aramcoworld.com/issue/196902/dinner.at.when.htm
-# newspapers.com says a similar story about Higgins was published in the Port
-# Angeles (WA) Evening News, 1965-03-10, page 5, but I lack access to the text.
+# Also see: Antar EN. Arabian flying is confusing.
+# Port Angeles (WA) Evening News. 1965-03-10. page 3.
 #
 # The TZ database cannot represent quasi-solar time; airline time is the best
 # we can do.  The 1946 foreign air news digest of the U.S. Civil Aeronautics
--- a/test/jdk/sun/util/calendar/zi/tzdata/australasia	Tue Jul 16 16:36:20 2019 +0000
+++ b/test/jdk/sun/util/calendar/zi/tzdata/australasia	Thu May 23 08:28:06 2019 +0100
@@ -423,10 +423,44 @@
 # it is uninhabited.
 
 # Guam
+
+# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
+# http://guamlegislature.com/Public_Laws_5th/PL05-025.pdf
+# http://documents.guam.gov/wp-content/uploads/E.O.-59-7-Guam-Daylight-Savings-Time-May-6-1959.pdf
+Rule	Guam	1959	only	-	Jun	27	2:00	1:00	D
+# http://documents.guam.gov/wp-content/uploads/E.O.-61-5-Revocation-of-Daylight-Saving-Time-and-Restoratio.pdf
+Rule	Guam	1961	only	-	Jan	29	2:00	0	S
+# http://documents.guam.gov/wp-content/uploads/E.O.-67-13-Guam-Daylight-Savings-Time.pdf
+Rule	Guam	1967	only	-	Sep	 1	2:00	1:00	D
+# http://documents.guam.gov/wp-content/uploads/E.O.-69-2-Repeal-of-Guam-Daylight-Saving-Time.pdf
+Rule	Guam	1969	only	-	Jan	26	0:01	0	S
+# http://documents.guam.gov/wp-content/uploads/E.O.-69-10-Guam-Daylight-Saving-Time.pdf
+Rule	Guam	1969	only	-	Jun	22	2:00	1:00	D
+Rule	Guam	1969	only	-	Aug	31	2:00	0	S
+# http://documents.guam.gov/wp-content/uploads/E.O.-70-10-Guam-Daylight-Saving-Time.pdf
+# http://documents.guam.gov/wp-content/uploads/E.O.-70-30-End-of-Guam-Daylight-Saving-Time.pdf
+# http://documents.guam.gov/wp-content/uploads/E.O.-71-5-Guam-Daylight-Savings-Time.pdf
+Rule	Guam	1970	1971	-	Apr	lastSun	2:00	1:00	D
+Rule	Guam	1970	1971	-	Sep	Sun>=1	2:00	0	S
+# http://documents.guam.gov/wp-content/uploads/E.O.-73-28.-Guam-Day-light-Saving-Time.pdf
+Rule	Guam	1973	only	-	Dec	16	2:00	1:00	D
+# http://documents.guam.gov/wp-content/uploads/E.O.-74-7-Guam-Daylight-Savings-Time-Rescinded.pdf
+Rule	Guam	1974	only	-	Feb	24	2:00	0	S
+# http://documents.guam.gov/wp-content/uploads/E.O.-76-13-Daylight-Savings-Time.pdf
+Rule	Guam	1976	only	-	May	26	2:00	1:00	D
+# http://documents.guam.gov/wp-content/uploads/E.O.-76-25-Revocation-of-E.O.-76-13.pdf
+Rule	Guam	1976	only	-	Aug	22	2:01	0	S
+# http://documents.guam.gov/wp-content/uploads/E.O.-77-4-Daylight-Savings-Time.pdf
+Rule	Guam	1977	only	-	Apr	24	2:00	1:00	D
+# http://documents.guam.gov/wp-content/uploads/E.O.-77-18-Guam-Standard-Time.pdf
+Rule	Guam	1977	only	-	Aug	28	2:00	0	S
+
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Pacific/Guam	-14:21:00 -	LMT	1844 Dec 31
 			 9:39:00 -	LMT	1901        # Agana
-			10:00	-	GST	2000 Dec 23 # Guam
+			10:00	-	GST	1941 Dec 10 # Guam
+			 9:00	-	+09	1944 Jul 31
+			10:00	Guam	G%sT	2000 Dec 23
 			10:00	-	ChST	# Chamorro Standard Time
 Link Pacific/Guam Pacific/Saipan # N Mariana Is
 
@@ -448,31 +482,56 @@
 
 # Marshall Is
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
-Zone Pacific/Majuro	11:24:48 -	LMT	1901
-			11:00	-	+11	1969 Oct
-			12:00	-	+12
-Zone Pacific/Kwajalein	11:09:20 -	LMT	1901
-			11:00	-	+11	1969 Oct
-			-12:00	-	-12	1993 Aug 20
-			12:00	-	+12
+Zone Pacific/Majuro	 11:24:48 -	LMT	1901
+			 11:00	-	+11	1914 Oct
+			  9:00	-	+09	1919 Feb  1
+			 11:00	-	+11	1937
+			 10:00	-	+10	1941 Apr  1
+			  9:00	-	+09	1944 Jan 30
+			 11:00	-	+11	1969 Oct
+			 12:00	-	+12
+Zone Pacific/Kwajalein	 11:09:20 -	LMT	1901
+			 11:00	-	+11	1937
+			 10:00	-	+10	1941 Apr  1
+			  9:00	-	+09	1944 Feb  6
+			 11:00	-	+11	1969 Oct
+			-12:00	-	-12	1993 Aug 20 24:00
+			 12:00	-	+12
 
 # Micronesia
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
-Zone Pacific/Chuuk	10:07:08 -	LMT	1901
-			10:00	-	+10
-Zone Pacific/Pohnpei	10:32:52 -	LMT	1901 # Kolonia
-			11:00	-	+11
-Zone Pacific/Kosrae	10:51:56 -	LMT	1901
-			11:00	-	+11	1969 Oct
-			12:00	-	+12	1999
-			11:00	-	+11
+Zone Pacific/Chuuk	-13:52:52 -	LMT	1844 Dec 31
+			 10:07:08 -	LMT	1901
+			 10:00	-	+10	1914 Oct
+			  9:00	-	+09	1919 Feb  1
+			 10:00	-	+10	1941 Apr  1
+			  9:00	-	+09	1945 Aug
+			 10:00	-	+10
+Zone Pacific/Pohnpei	-13:27:08 -	LMT	1844 Dec 31	# Kolonia
+			 10:32:52 -	LMT	1901
+			 11:00	-	+11	1914 Oct
+			  9:00	-	+09	1919 Feb  1
+			 11:00	-	+11	1937
+			 10:00	-	+10	1941 Apr  1
+			  9:00	-	+09	1945 Aug
+			 11:00	-	+11
+Zone Pacific/Kosrae	-13:08:04 -	LMT	1844 Dec 31
+			 10:51:56 -	LMT	1901
+			 11:00	-	+11	1914 Oct
+			  9:00	-	+09	1919 Feb  1
+			 11:00	-	+11	1937
+			 10:00	-	+10	1941 Apr  1
+			  9:00	-	+09	1945 Aug
+			 11:00	-	+11	1969 Oct
+			 12:00	-	+12	1999
+			 11:00	-	+11
 
 # Nauru
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Pacific/Nauru	11:07:40 -	LMT	1921 Jan 15 # Uaobe
-			11:30	-	+1130	1942 Mar 15
-			9:00	-	+09	1944 Aug 15
-			11:30	-	+1130	1979 May
+			11:30	-	+1130	1942 Aug 29
+			 9:00	-	+09	1945 Sep  8
+			11:30	-	+1130	1979 Feb 10  2:00
 			12:00	-	+12
 
 # New Caledonia
@@ -573,8 +632,9 @@
 
 # Palau (Belau)
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
-Zone Pacific/Palau	8:57:56 -	LMT	1901 # Koror
-			9:00	-	+09
+Zone Pacific/Palau	-15:02:04 -	LMT	1844 Dec 31	# Koror
+			  8:57:56 -	LMT	1901
+			  9:00	-	+09
 
 # Papua New Guinea
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
@@ -836,7 +896,7 @@
 # tz@iana.org for general use in the future).  For more, please see
 # the file CONTRIBUTING in the tz distribution.
 
-# From Paul Eggert (2017-02-10):
+# From Paul Eggert (2018-11-18):
 #
 # Unless otherwise specified, the source for data through 1990 is:
 # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
@@ -861,6 +921,7 @@
 # A reliable and entertaining source about time zones is
 # Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997).
 #
+# I invented the abbreviation marked "*".
 # The following abbreviations are from other sources.
 # Corrections are welcome!
 #		std	dst
@@ -868,7 +929,7 @@
 #	  8:00	AWST	AWDT	Western Australia
 #	  9:30	ACST	ACDT	Central Australia
 #	 10:00	AEST	AEDT	Eastern Australia
-#	 10:00	GST		Guam through 2000
+#	 10:00	GST	GDT*	Guam through 2000
 #	 10:00	ChST		Chamorro
 #	 11:30	NZMT	NZST	New Zealand through 1945
 #	 12:00	NZST	NZDT	New Zealand 1946-present
@@ -1567,28 +1628,70 @@
 
 # Kwajalein
 
-# In comp.risks 14.87 (26 August 1993), Peter Neumann writes:
-# I wonder what happened in Kwajalein, where there was NO Friday,
-# 1993-08-20.  Thursday night at midnight Kwajalein switched sides with
-# respect to the International Date Line, to rejoin its fellow islands,
-# going from 11:59 p.m. Thursday to 12:00 m. Saturday in a blink.
+# From an AP article (1993-08-22):
+# "The nearly 3,000 Americans living on this remote Pacific atoll have a good
+# excuse for not remembering Saturday night: there wasn't one.  Residents were
+# going to bed Friday night and waking up Sunday morning because at midnight
+# -- 8 A.M. Eastern daylight time on Saturday -- Kwajalein was jumping from
+# one side of the international date line to the other."
+# "In Marshall Islands, Friday is followed by Sunday", NY Times. 1993-08-22.
+# https://www.nytimes.com/1993/08/22/world/in-marshall-islands-friday-is-followed-by-sunday.html
+
+# From Phake Nick (2018-10-27):
+# <https://wiki.suikawiki.org/n/南洋群島の標準時> ... pointed out that
+# currently tzdata say Pacific/Kwajalein switched from GMT+11 to GMT-12 in
+# 1969 October without explanation, however an 1993 article from NYT say it
+# synchorized its day with US mainland about 40 years ago and thus the switch
+# should occur at around 1950s instead.
+#
+# From Paul Eggert (2018-11-18):
+# The NYT (actually, AP) article is vague and possibly wrong about this.
+# The article says the earlier switch was "40 years ago when the United States
+# Army established a missile test range here".  However, the Kwajalein Test
+# Center was established on 1960-10-01 and was run by the US Navy.  It was
+# transferred to the US Army on 1964-07-01.  See "Seize the High Ground"
+# <https://history.army.mil/html/books/070/70-88-1/cmhPub_70-88-1.pdf>.
+# Given that Shanks was right on the money about the 1993 change, I'm inclined
+# to take Shanks's word for the 1969 change unless we find better evidence.
 
 
 # N Mariana Is, Guam
 
+# From Phake Nick (2018-10-27):
+# Guam Island was briefly annexed by Japan during ... year 1941-1944 ...
+# however there are no detailed information about what time it use during that
+# period.  It would probably be reasonable to assume Guam use GMT+9 during
+# that period of time like the surrounding area.
+
+# From Paul Eggert (2018-11-18):
 # Howse writes (p 153) "The Spaniards, on the other hand, reached the
 # Philippines and the Ladrones from America," and implies that the Ladrones
 # (now called the Marianas) kept American date for quite some time.
 # For now, we assume the Ladrones switched at the same time as the Philippines;
 # see Asia/Manila.
-
+#
+# Use 1941-12-10 and 1944-07-31 for Guam WWII transitions, as the rough start
+# and end of Japanese control of Agana.  We don't know whether the Northern
+# Marianas followed Guam's DST rules from 1959 through 1977; for now, assume
+# they did as that avoids the need for a separate zone due to our 1970 cutoff.
+#
 # US Public Law 106-564 (2000-12-23) made UT +10 the official standard time,
 # under the name "Chamorro Standard Time".  There is no official abbreviation,
 # but Congressman Robert A. Underwood, author of the bill that became law,
 # wrote in a press release (2000-12-27) that he will seek the use of "ChST".
 
+# See also the commentary for Micronesia.
 
-# Micronesia
+
+# Marshall Is
+# See the commentary for Micronesia.
+
+
+# Micronesia (and nearby)
+
+# From Paul Eggert (2018-11-18):
+# Like the Ladrones (see Guam commentary), assume the Spanish East Indies
+# kept American time until the Philippines switched at the end of 1844.
 
 # Alan Eugene Davis writes (1996-03-16),
 # "I am certain, having lived there for the past decade, that 'Truk'
@@ -1604,6 +1707,95 @@
 # that Truk and Yap are UT +10, and Ponape and Kosrae are +11.
 # We don't know when Kosrae switched from +12; assume January 1 for now.
 
+# From Phake Nick (2018-10-27):
+#
+# From a Japanese wiki site https://wiki.suikawiki.org/n/南洋群島の標準時
+# ...
+# For "Southern Islands" (modern region of Mariana + Palau + Federation of
+# Micronesia + Marshall Islands):
+#
+# A 1906 Japanese magazine shown the Caroline Islands and Mariana Islands
+# who was occupied by Germany at the time as GMT+10, together with the like
+# of German New Guinea.  However there is a marking saying it have not been
+# implemented (yet).  No further information after that were found.
+#
+# Japan invaded those islands in 1914, and records shows that they were
+# instructed to use JST at the time.
+#
+# 1915 January telecommunication record on the Jaluit Atoll shows they use
+# the meridian of 170E as standard time (GMT+11:20), which is similar to the
+# longitude of the atoll.
+# 1915 February record say the 170E standard time is to be used until
+# February 9 noon, and after February 9 noon they are to use JST.
+# However these are time used within the Japanese Military at the time and
+# probably does not reflect the time used by local resident at the time (that
+# is if they keep their own time back then)
+#
+# In January 1919 the occupying force issued a command that split the area
+# into three different timezone with meridian of 135E, 150E, 165E (JST+0, +1,
+# +2), and the command was to become effective from February 1 of the same
+# year.  Despite the target of the command is still only for the occupying
+# force itself, further publication have described the time as the standard
+# time for the occupied area and thus it can probably be seen as such.
+#  * Area that use meridian of 135E: Palau and Yap civil administration area
+#    (Southern Islands Western Standard Time)
+#  * Area that use meridian of 150E: Truk (Chuuk) and Saipan civil
+#    administration area (Southern Islands Central Standard Time)
+#  * Area that use meridian of 165E: Ponape (Pohnpei) and Jaluit civil
+#    administration area (Southern Islands Eastern Standard Time).
+#  * In the next few years Japanese occupation of those islands have been
+#    formalized via League of Nation Mandate (South Pacific Mandate) and formal
+#    governance structure have been established, these district [become
+#    subprefectures] and timezone classification have been inherited as standard
+#    time of the area.
+#  * Saipan subprefecture include Mariana islands (exclude Guam which was
+#    occupied by America at the time), Palau and Yap subprefecture rule the
+#    Western Caroline Islands with 137E longitude as border, Truk and Ponape
+#    subprefecture rule the Eastern Caroline Islands with 154E as border, Ponape
+#    subprefecture also rule part of Marshall Islands to the west of 164E
+#    starting from (1918?) and Jaluit subprefecture rule the rest of the
+#    Marshall Islands.
+#
+# And then in year 1937, an announcement was made to change the time in the
+# area into 2 timezones:
+#  * Area that use meridian of 135E: area administered by Palau, Yap and
+#    Saipan subprefecture (Southern Islands Western Standard Time)
+#  * Area that use meridian of 150E: area administered by Truk (Chuuk),
+#    Ponape (Pohnpei) and Jaluit subprefecture (Southern Islands Eastern
+#    Standard Time)
+#
+# Another announcement issued in 1941 say that on April 1 that year,
+# standard time of the Southern Islands would be changed to use the meridian
+# of 135E (GMT+9), and thus abolishing timezone different within the area.
+#
+# Then Pacific theater of WWII started and Japan slowly lose control on the
+# island.  The webpage I linked above contain no information during this
+# period of time....
+#
+# After the end of WWII, in 1946 February, a document written by the
+# (former?) Japanese military personnel describe there are 3 hours time
+# different between Caroline islands time/Wake island time and the Chungking
+# time, which would mean the time being used there at the time was GMT+10.
+#
+# After that, the area become Trust Territories of the Pacific Islands
+# under American administration from year 1947.  The site listed some
+# American/International books/maps/publications about time used in those
+# area during this period of time but they doesn't seems to be reliable
+# information so it would be the best if someone know where can more reliable
+# information can be found.
+#
+#
+# From Paul Eggert (2018-11-18):
+#
+# For the above, use vague dates like "1914" and "1945" for transitions that
+# plausibly exist but for which the details are not known.  The information
+# for Wake is too sketchy to act on.
+#
+# The 1906 GMT+10 info about German-controlled islands might not have been
+# done, so omit it from the data for now.
+#
+# The Jaluit info governs Kwajalein.
+
 
 # Midway
 
@@ -1621,6 +1813,29 @@
 # started DST on June 3.  Possibly DST was observed other years
 # in Midway, but we have no record of it.
 
+# Nauru
+
+# From Phake Nick (2018-10-31):
+# Currently, the tz database say Nauru use LMT until 1921, and then
+# switched to GMT+11:30 for the next two decades.
+# However, a number of timezone map published in America/Japan back then
+# showed its timezone as GMT+11 per https://wiki.suikawiki.org/n/ナウルの標準時
+# And it would also be nice if the 1921 transition date could be sourced.
+# ...
+# The "Nauru Standard Time Act 1978 Time Change"
+# http://ronlaw.gov.nr/nauru_lpms/files/gazettes/4b23a17d2030150404db7a5fa5872f52.pdf#page=3
+# based on "Nauru Standard Time Act 1978 Time Change"
+# http://www.paclii.org/nr/legis/num_act/nsta1978207/ defined that "Nauru
+# Alternative Time" (GMT+12) should be in effect from 1979 Feb.
+#
+# From Paul Eggert (2018-11-19):
+# The 1921-01-15 introduction of standard time is in Shanks; it is also in
+# "Standard Time Throughout the World", US National Bureau of Standards (1935),
+# page 3, which does not give the UT offset.  In response to a comment by
+# Phake Nick I set the Nauru time of occupation by Japan to
+# 1942-08-29/1945-09-08 by using dates from:
+# https://en.wikipedia.org/wiki/Japanese_occupation_of_Nauru
+
 # Norfolk
 
 # From Alexander Krivenyshev (2015-09-23):
@@ -1636,6 +1851,9 @@
 # other than in 1974/5.  See:
 # https://www.timeanddate.com/time/australia/norfolk-island.html
 
+# Palau
+# See commentary for Micronesia.
+
 # Pitcairn
 
 # From Rives McDow (1999-11-08):
@@ -1800,6 +2018,9 @@
 # From Paul Eggert (2003-03-23):
 # We have no other report of DST in Wake Island, so omit this info for now.
 
+# See also the commentary for Micronesia.
+
+
 ###############################################################################
 
 # The International Date Line
--- a/test/jdk/sun/util/calendar/zi/tzdata/leapseconds	Tue Jul 16 16:36:20 2019 +0000
+++ b/test/jdk/sun/util/calendar/zi/tzdata/leapseconds	Thu May 23 08:28:06 2019 +0100
@@ -40,9 +40,12 @@
 # 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.
+# did not exist.  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:
--- a/test/jdk/sun/util/calendar/zi/tzdata/northamerica	Tue Jul 16 16:36:20 2019 +0000
+++ b/test/jdk/sun/util/calendar/zi/tzdata/northamerica	Thu May 23 08:28:06 2019 +0100
@@ -620,6 +620,17 @@
 # between AKST and AKDT from now on....
 # https://www.krbd.org/2015/10/30/annette-island-times-they-are-a-changing/
 
+# From Ryan Stanley (2018-11-06):
+# The Metlakatla community in Alaska has decided not to change its
+# clock back an hour starting on November 4th, 2018 (day before yesterday).
+# They will be gmtoff=-28800 year-round.
+# https://www.facebook.com/141055983004923/photos/pb.141055983004923.-2207520000.1541465673./569081370202380/
+
+# From Paul Eggert (2018-12-16):
+# In a 2018-12-11 special election, Metlakatla voted to go back to
+# Alaska time (including daylight saving time) starting next year.
+# https://www.krbd.org/2018/12/12/metlakatla-to-follow-alaska-standard-time-allow-liquor-sales/
+
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone America/Juneau	 15:02:19 -	LMT	1867 Oct 19 15:33:32
 			 -8:57:41 -	LMT	1900 Aug 20 12:00
@@ -646,6 +657,8 @@
 			 -8:00	-	PST	1969
 			 -8:00	US	P%sT	1983 Oct 30  2:00
 			 -8:00	-	PST	2015 Nov  1  2:00
+			 -9:00	US	AK%sT	2018 Nov  4  2:00
+			 -8:00	-	PST	2019 Mar Sun>=8 3:00
 			 -9:00	US	AK%sT
 Zone America/Yakutat	 14:41:05 -	LMT	1867 Oct 19 15:12:18
 			 -9:18:55 -	LMT	1900 Aug 20 12:00
@@ -806,6 +819,22 @@
 # For a map of Indiana's time zone regions, see:
 # https://en.wikipedia.org/wiki/Time_in_Indiana
 #
+# From Paul Eggert (2018-11-30):
+# A brief but entertaining history of time in Indiana describes a 1949 debate
+# in the Indiana House where city legislators (who favored "fast time")
+# tussled with farm legislators (who didn't) over a bill to outlaw DST:
+#  "Lacking enough votes, the city faction tries to filibuster until time runs
+#   out on the session at midnight, but rural champion Rep. Herbert Copeland,
+#   R-Madison, leans over the gallery railing and forces the official clock
+#   back to 9 p.m., breaking it in the process.  The clock sticks on 9 as the
+#   debate rages on into the night.  The filibuster finally dies out and the
+#   bill passes, while outside the chamber, clocks read 3:30 a.m.  In the end,
+#   it doesn't matter which side won.  The law has no enforcement powers and
+#   is simply ignored by fast-time communities."
+# How Indiana went from 'God's time' to split zones and daylight-saving.
+# Indianapolis Star. 2018-11-27 14:58 -05.
+# https://www.indystar.com/story/news/politics/2018/11/27/indianapolis-indiana-time-zone-history-central-eastern-daylight-savings-time/2126300002/
+#
 # From Paul Eggert (2007-08-17):
 # Since 1970, most of Indiana has been like America/Indiana/Indianapolis,
 # with the following exceptions:
--- a/test/jdk/sun/util/calendar/zi/tzdata/zone.tab	Tue Jul 16 16:36:20 2019 +0000
+++ b/test/jdk/sun/util/calendar/zi/tzdata/zone.tab	Thu May 23 08:28:06 2019 +0100
@@ -260,6 +260,7 @@
 KY	+1918-08123	America/Cayman
 KZ	+4315+07657	Asia/Almaty	Kazakhstan (most areas)
 KZ	+4448+06528	Asia/Qyzylorda	Qyzylorda/Kyzylorda/Kzyl-Orda
+KZ	+5312+06337	Asia/Qostanay	Qostanay/Kostanay/Kustanay
 KZ	+5017+05710	Asia/Aqtobe	Aqtobe/Aktobe
 KZ	+4431+05016	Asia/Aqtau	Mangghystau/Mankistau
 KZ	+4707+05156	Asia/Atyrau	Atyrau/Atirau/Gur'yev
@@ -353,9 +354,9 @@
 RU	+5443+02030	Europe/Kaliningrad	MSK-01 - Kaliningrad
 RU	+554521+0373704	Europe/Moscow	MSK+00 - Moscow area
 RU	+4457+03406	Europe/Simferopol	MSK+00 - Crimea
-RU	+4844+04425	Europe/Volgograd	MSK+00 - Volgograd
 RU	+5836+04939	Europe/Kirov	MSK+00 - Kirov
 RU	+4621+04803	Europe/Astrakhan	MSK+01 - Astrakhan
+RU	+4844+04425	Europe/Volgograd	MSK+01 - Volgograd
 RU	+5134+04602	Europe/Saratov	MSK+01 - Saratov
 RU	+5420+04824	Europe/Ulyanovsk	MSK+01 - Ulyanovsk
 RU	+5312+05009	Europe/Samara	MSK+01 - Samara, Udmurtia