The branch releng/12.2 has been updated by emaste:

URL: 
https://cgit.FreeBSD.org/src/commit/?id=58dcfdf3fba790e608a288409ce41bb782cdacde

commit 58dcfdf3fba790e608a288409ce41bb782cdacde
Author:     Philip Paeps <[email protected]>
AuthorDate: 2020-12-25 15:16:38 +0000
Commit:     Ed Maste <[email protected]>
CommitDate: 2021-01-29 01:14:02 +0000

    MFC: contrib/tzdata: import tzdata 2020e
    
    Changes: https://github.com/eggert/tz/blob/2020e/NEWS
    
    (cherry picked from commit dc505d53dcc15636aea9df8c03298f8c32147fa9)
    (cherry picked from commit 1a8f8af03320165b33526d44de4f12360aa5440a)
    
    Approved by:    so
---
 contrib/tzdata/Makefile        |  57 ++++++---
 contrib/tzdata/NEWS            |  46 +++++++
 contrib/tzdata/africa          | 236 ++++++++++++++++++++++++++++++-----
 contrib/tzdata/asia            | 274 +++++++++++++++++++++++++++++++----------
 contrib/tzdata/australasia     | 106 ++++++++++++----
 contrib/tzdata/backward        |   1 +
 contrib/tzdata/backzone        |   6 +
 contrib/tzdata/etcetera        |  11 +-
 contrib/tzdata/europe          |  16 ++-
 contrib/tzdata/leapseconds     |   4 +
 contrib/tzdata/leapseconds.awk |   4 +
 contrib/tzdata/northamerica    | 202 ++++++++++++++++++++++++++++--
 contrib/tzdata/theory.html     |   5 +-
 contrib/tzdata/version         |   2 +-
 contrib/tzdata/zone.tab        |   9 +-
 contrib/tzdata/zone1970.tab    |   9 +-
 16 files changed, 816 insertions(+), 172 deletions(-)

diff --git a/contrib/tzdata/Makefile b/contrib/tzdata/Makefile
index 40b81d18b0d5..5064a190c5a5 100644
--- a/contrib/tzdata/Makefile
+++ b/contrib/tzdata/Makefile
@@ -583,11 +583,19 @@ INSTALL:  ALL install date.1
                cp date '$(DESTDIR)$(BINDIR)/.'
                cp -f date.1 '$(DESTDIR)$(MANDIR)/man1/.'
 
+# Calculate version number from git, if available.
+# Otherwise, use $(VERSION) unless it is "unknown" and there is already
+# a 'version' file, in which case reuse the existing 'version' contents
+# and append "-dirty" if the contents do not already end in "-dirty".
 version:       $(VERSION_DEPS)
                { (type git) >/dev/null 2>&1 && \
                  V=`git describe --match '[0-9][0-9][0-9][0-9][a-z]*' \
                                --abbrev=7 --dirty` || \
-                 V='$(VERSION)'; } && \
+                 if test '$(VERSION)' = unknown && V=`cat $@`; then \
+                   case $$V in *-dirty);; *) V=$$V-dirty;; esac; \
+                 else \
+                   V='$(VERSION)'; \
+                 fi; } && \
                printf '%s\n' "$$V" >[email protected]
                mv [email protected] $@
 
@@ -872,11 +880,34 @@ $(MANTXTS):       workman.sh
                LC_ALL=C sh workman.sh `expr $@ : '\(.*\)\.txt$$'` >[email protected]
                mv [email protected] $@
 
+# Set file timestamps deterministically if possible,
+# so that tarballs containing the timestamps are reproducible.
+#
+# '$(SET_TIMESTAMP_N) N DEST A B C ...' sets the timestamp of the
+# file DEST to the maximum of the timestamps of the files A B C ...,
+# plus N if GNU ls and touch are available.
+SET_TIMESTAMP_N = sh -c '\
+  n=$$0 dest=$$1; shift; \
+  touch -cmr `ls -t "$$@" | sed 1q` "$$dest" && \
+  if test $$n != 0 && \
+     lsout=`ls -n --time-style="+%s" "$$dest" 2>/dev/null`; then \
+    set x $$lsout && \
+    touch -cmd @`expr $$7 + $$n` "$$dest"; \
+  else :; fi'
+# If DEST depends on A B C ... in this Makefile, callers should use
+# $(SET_TIMESTAMP_DEP) DEST A B C ..., for the benefit of any
+# downstream 'make' that considers equal timestamps to be out of date.
+# POSIX allows this 'make' behavior, and HP-UX 'make' does it.
+# If all that matters is that the timestamp be reproducible
+# and plausible, use $(SET_TIMESTAMP).
+SET_TIMESTAMP = $(SET_TIMESTAMP_N) 0
+SET_TIMESTAMP_DEP = $(SET_TIMESTAMP_N) 1
+
 # Set the timestamps to those of the git repository, if available,
 # and if the files have not changed since then.
-# This uses GNU 'touch' syntax 'touch -d@N FILE',
-# where N is the number of seconds since 1970.
-# If git or GNU 'touch' is absent, don't bother to sync with git timestamps.
+# This uses GNU 'ls --time-style=+%s', which outputs the seconds count,
+# and GNU 'touch -d@N FILE', where N is the number of seconds since 1970.
+# If git or GNU is absent, don't bother to sync with git timestamps.
 # Also, set the timestamp of each prebuilt file like 'leapseconds'
 # to be the maximum of the files it depends on.
 set-timestamps.out: $(EIGHT_YARDS)
@@ -894,16 +925,16 @@ set-timestamps.out: $(EIGHT_YARDS)
                    fi || exit; \
                  done; \
                fi
-               touch -cmr `ls -t $(LEAP_DEPS) | sed 1q` leapseconds
+               $(SET_TIMESTAMP_DEP) leapseconds $(LEAP_DEPS)
                for file in `ls $(MANTXTS) | sed 's/\.txt$$//'`; do \
-                 touch -cmr `ls -t $$file workman.sh | sed 1q` $$file.txt || \
+                 $(SET_TIMESTAMP_DEP) $$file.txt $$file workman.sh || \
                    exit; \
                done
-               touch -cmr `ls -t $(TZDATA_ZI_DEPS) | sed 1q` tzdata.zi
-               touch -cmr `ls -t $(VERSION_DEPS) | sed 1q` version
+               $(SET_TIMESTAMP_DEP) version $(VERSION_DEPS)
+               $(SET_TIMESTAMP_DEP) tzdata.zi $(TZDATA_ZI_DEPS)
                touch $@
 set-tzs-timestamp.out: $(TZS)
-               touch -cmr `ls -t $(TZS_DEPS) | sed 1q` $(TZS)
+               $(SET_TIMESTAMP_DEP) $(TZS) $(TZS_DEPS)
                touch $@
 
 # The zics below ensure that each data file can stand on its own.
@@ -981,7 +1012,7 @@ tarballs rearguard_tarballs traditional_tarballs \
 signatures rearguard_signatures traditional_signatures: \
   version set-timestamps.out rearguard.zi
                VERSION=`cat version` && \
-               $(MAKE) VERSION="$$VERSION" $@_version
+               $(MAKE) AWK='$(AWK)' VERSION="$$VERSION" $@_version
 
 # These *_version rules are intended for use if VERSION is set by some
 # other means.  Ordinarily these rules are used only by the above
@@ -1018,7 +1049,7 @@ tzdata$(VERSION)-rearguard.tar.gz: rearguard.zi 
set-timestamps.out
                for f in $(TDATA) $(PACKRATDATA); do \
                  rearf=tzdata$(VERSION)-rearguard.dir/$$f; \
                  $(AWK) -v DATAFORM=rearguard -f ziguard.awk $$f >$$rearf && \
-                 touch -cmr `ls -t ziguard.awk $$f` $$rearf || exit; \
+                 $(SET_TIMESTAMP_DEP) $$rearf ziguard.awk $$f || exit; \
                done
                sed '1s/$$/-rearguard/' \
                  <version >tzdata$(VERSION)-rearguard.dir/version
@@ -1037,7 +1068,7 @@ tzdb-$(VERSION).tar.lz: set-timestamps.out 
set-tzs-timestamp.out
                rm -fr tzdb-$(VERSION)
                mkdir tzdb-$(VERSION)
                ln $(ENCHILADA) tzdb-$(VERSION)
-               touch -cmr `ls -t tzdb-$(VERSION)/* | sed 1q` tzdb-$(VERSION)
+               $(SET_TIMESTAMP) tzdb-$(VERSION) tzdb-$(VERSION)/*
                LC_ALL=C && export LC_ALL && \
                tar $(TARFLAGS) -cf - tzdb-$(VERSION) | lzip -9 >[email protected]
                mv [email protected] $@
@@ -1079,8 +1110,6 @@ strftime.o:       private.h tzfile.h
 zdump.o:       version.h
 zic.o:         private.h tzfile.h version.h
 
-.KEEP_STATE:
-
 .PHONY: ALL INSTALL all
 .PHONY: check check_time_t_alternatives
 .PHONY: check_web check_zishrink
diff --git a/contrib/tzdata/NEWS b/contrib/tzdata/NEWS
index 328face24016..6014b45a0b4a 100644
--- a/contrib/tzdata/NEWS
+++ b/contrib/tzdata/NEWS
@@ -1,5 +1,51 @@
 News for the tz database
 
+Release 2020e - 2020-12-22 15:14:34 -0800
+
+  Briefly:
+    Volgograd switches to Moscow time on 2020-12-27 at 02:00.
+
+  Changes to future timestamps
+
+    Volgograd changes time zone from +04 to +03 on 2020-12-27 at 02:00.
+    (Thanks to Alexander Krivenyshev and Stepan Golosunov.)
+
+  Changes to past timestamps
+
+    Correct many pre-1986 transitions, fixing entries originally
+    derived from Shanks.  The fixes include:
+      - Australia: several 1917 through 1971 transitions
+      - Bahamas: several 1941 through 1945 transitions
+      - Bermuda: several 1917 through 1956 transitions
+      - Belize: several 1942 through 1968 transitions
+      - Ghana: several 1915 through 1956 transitions
+      - Israel and Palestine: several 1940 through 1985 transitions
+      - Kenya and adjacent: several 1908 through 1960 transitions
+      - Nigeria and adjacent: correcting LMT in Lagos, and several 1905
+        through 1919 transitions
+      - Seychelles: the introduction of standard time in 1907, not 1906
+      - Vanuatu: DST in 1973-1974, and a corrected 1984 transition
+    (Thanks to P Chan.)
+
+    Because of the Australia change, Australia/Currie (King Island) is
+    no longer needed, as it is identical to Australia/Hobart for all
+    timestamps since 1970 and was therefore created by mistake.
+    Australia/Currie has been moved to the 'backward' file and its
+    corrected data moved to the 'backzone' file.
+
+  Changes to past time zone abbreviations and DST flags
+
+    To better match legislation in Turks and Caicos, the 2015 shift to
+    year-round observance of -04 is now modeled as AST throughout before
+    returning to Eastern Time with US DST in 2018, rather than as
+    maintaining EDT until 2015-11-01.  (Thanks to P Chan.)
+
+  Changes to documentation
+
+    The zic man page now documents zic's coalescing of transitions
+    when a zone falls back just before DST springs forward.
+
+
 Release 2020d - 2020-10-21 11:24:13 -0700
 
   Briefly:
diff --git a/contrib/tzdata/africa b/contrib/tzdata/africa
index 566436b319e4..59cf501ec954 100644
--- a/contrib/tzdata/africa
+++ b/contrib/tzdata/africa
@@ -386,36 +386,87 @@ Zone      Africa/Cairo    2:05:09 -       LMT     1900 Oct
 
 # Ghana
 
-# From Paul Eggert (2018-01-30):
-# Whitman says DST was observed from 1931 to "the present";
-# Shanks & Pottenger say 1936 to 1942 with 20 minutes of DST,
-# with transitions on 09-01 and 12-31 at 00:00.
-# Page 33 of Parish GCB, Colonial Reports - Annual. No. 1066. Gold
-# Coast. Report for 1919. (March 1921), OCLC 784024077
-# 
http://libsysdigi.library.illinois.edu/ilharvest/africana/books2011-05/5530214/5530214_1919/5530214_1919_opt.pdf
-# lists the Determination of the Time Ordinance, 1919, No. 18,
-# "to advance the time observed locally by the space of twenty minutes
-# during the last four months of each year; the object in view being
-# to extend during those months the period of daylight-time available
-# for evening recreation after office hours."
-# Vanessa Ogle, The Global Transformation of Time, 1870-1950 (2015), p 33,
-# writes "In 1919, the Gold Coast (Ghana as of 1957) made Greenwich
-# time its legal time and simultaneously legalized a summer time of
-# UTC - 00:20 minutes from March to October."; a footnote lists
-# the ordinance as being dated 1919-11-24.
-# The Crown Colonist, Volume 12 (1942), p 176, says "the Government
-# intend advancing Gold Coast time half an hour ahead of G.M.T.
-# The actual date of the alteration has not yet been announced."
-# These sources are incomplete and contradictory.  Possibly what is
-# now Ghana observed different DST regimes in different years.  For
-# lack of better info, use Shanks except treat the minus sign as a
-# typo, and assume DST started in 1920 not 1936.
+# From P Chan (2020-11-20):
+# Interpretation Amendment Ordinance, 1915 (No.24 of 1915) [1915-11-02]
+# Ordinances of the Gold Coast, Ashanti, Northern Territories 1915, p 69-71
+# https://books.google.com/books?id=ErA-AQAAIAAJ&pg=PA70
+# This Ordinance added "'Time' shall mean Greenwich Mean Time" to the
+# Interpretation Ordinance, 1876.
+#
+# Determination of the Time Ordinance, 1919 (No. 18 of 1919) [1919-11-24]
+# Ordinances of the Gold Coast, Ashanti, Northern Territories 1919, p 75-76
+# https://books.google.com/books?id=MbA-AQAAIAAJ&pg=PA75
+# This Ordinance removed the previous definition of time and introduced DST.
+#
+# Time Determination Ordinance (Cap. 214)
+# The Laws of the Gold Coast (including Togoland Under British Mandate)
+# Vol. II (1937), p 2328
+# https://books.google.com/books?id=Z7M-AQAAIAAJ&pg=PA2328
+# Revised edition of the 1919 Ordinance.
+#
+# Time Determination (Amendment) Ordinance, 1940 (No. 9 of 1940) [1940-04-06]
+# Annual Volume of the Laws of the Gold Coast:
+# Containing All Legislation Enacted During Year 1940, p 22
+# https://books.google.com/books?id=1ao-AQAAIAAJ&pg=PA22
+# This Ordinance changed the forward transition from September to May.
+#
+# Defence (Time Determination Ordinance Amendment) Regulations, 1942
+# (Regulations No. 6 of 1942) [1942-01-31, commenced on 1942-02-08]
+# Annual Volume of the Laws of the Gold Coast:
+# Containing All Legislation Enacted During Year 1942, p 48
+# https://books.google.com/books?id=Das-AQAAIAAJ&pg=PA48
+# These regulations advanced the [standard] time by thirty minutes.
+#
+# Defence (Time Determination Ordinance Amendment (No.2)) Regulations,
+# 1942 (Regulations No. 28 of 1942) [1942-04-25]
+# Annual Volume of the Laws of the Gold Coast:
+# Containing All Legislation Enacted During Year 1942, p 87
+# https://books.google.com/books?id=Das-AQAAIAAJ&pg=PA87
+# These regulations abolished DST and changed the time to GMT+0:30.
+#
+# Defence (Revocation) (No.4) Regulations, 1945 (Regulations No. 45 of
+# 1945) [1945-10-24, commenced on 1946-01-06]
+# Annual Volume of the Laws of the Gold Coast:
+# Containing All Legislation Enacted During Year 1945, p 256
+# https://books.google.com/books?id=9as-AQAAIAAJ&pg=PA256
+# These regulations revoked the previous two sets of Regulations.
+#
+# Time Determination (Amendment) Ordinance, 1945 (No. 18 of 1945) [1946-01-06]
+# Annual Volume of the Laws of the Gold Coast:
+# Containing All Legislation Enacted During Year 1945, p 69
+# https://books.google.com/books?id=9as-AQAAIAAJ&pg=PA69
+# This Ordinance abolished DST.
+#
+# Time Determination (Amendment) Ordinance, 1950 (No. 26 of 1950) [1950-07-22]
+# Annual Volume of the Laws of the Gold Coast:
+# Containing All Legislation Enacted During Year 1950, p 35
+# https://books.google.com/books?id=e60-AQAAIAAJ&pg=PA35
+# This Ordinance restored DST but with thirty minutes offset.
+#
+# Time Determination Ordinance (Cap. 264)
+# The Laws of the Gold Coast, Vol. V (1954), p 380
+# https://books.google.com/books?id=Mqc-AQAAIAAJ&pg=PA380
+# Revised edition of the Time Determination Ordinance.
+#
+# Time Determination (Amendment) Ordinance, 1956 (No. 21 of 1956) [1956-08-29]
+# Annual Volume of the Ordinances of the Gold Coast Enacted During the
+# Year 1956, p 83
+# https://books.google.com/books?id=VLE-AQAAIAAJ&pg=PA83
+# This Ordinance abolished DST.
+
 # Rule NAME    FROM    TO      -       IN      ON      AT      SAVE    LETTER/S
-Rule   Ghana   1920    1942    -       Sep      1      0:00    0:20    -
-Rule   Ghana   1920    1942    -       Dec     31      0:00    0       -
+Rule   Ghana   1919    only    -       Nov     24      0:00    0:20    +0020
+Rule   Ghana   1920    1942    -       Jan      1      2:00    0       GMT
+Rule   Ghana   1920    1939    -       Sep      1      2:00    0:20    +0020
+Rule   Ghana   1940    1941    -       May      1      2:00    0:20    +0020
+Rule   Ghana   1950    1955    -       Sep      1      2:00    0:30    +0030
+Rule   Ghana   1951    1956    -       Jan      1      2:00    0       GMT
+
 # Zone NAME            STDOFF  RULES   FORMAT  [UNTIL]
-Zone   Africa/Accra    -0:00:52 -      LMT     1918
-                        0:00   Ghana   GMT/+0020
+Zone   Africa/Accra    -0:00:52 -      LMT     1915 Nov  2
+                        0:00   Ghana   %s      1942 Feb  8
+                        0:30   -       +0030   1946 Jan  6
+                        0:00   Ghana   %s
 
 # Guinea
 # See Africa/Abidjan.
@@ -433,11 +484,54 @@ Zone      Africa/Bissau   -1:02:20 -      LMT     1912 
Jan  1  1:00u
                         0:00   -       GMT
 
 # Kenya
+
+# From P Chan (2020-10-24):
+#
+# The standard time of GMT+2:30 was adopted in the East Africa Protectorate....
+# [The Official Gazette, 1908-05-01, p 274]
+# https://books.google.com/books?id=e-cAC-sjPSEC&pg=PA274
+#
+# At midnight on 30 June 1928 the clocks throughout Kenya was put forward
+# half an hour by the Alteration of Time Ordinance, 1928.
+# 
https://gazettes.africa/archive/ke/1928/ke-government-gazette-dated-1928-05-11-no-28.pdf
+# [Ordinance No. 11 of 1928, The Offical Gazette, 1928-06-26, p 813]
+# https://books.google.com/books?id=2S0S6os32ZUC&pg=PA813
+#
+# The 1928 ordinance was repealed by the Alteration of Time (repeal) Ordinance,
+# 1929 and the time was restored to GMT+2:30 at midnight on 4 January 1930.
+# [Ordinance No. 97 of 1929, The Official Gazette, 1929-12-31, p 2701]
+# https://books.google.com/books?id=_g18jIZQlwwC&pg=PA2701
+#
+# The Alteration of Time Ordinance, 1936 changed the time to GMT+2:45
+# and repealed the previous ordinance at midnight on 31 December 1936.
+# [The Official Gazette, 1936-07-21, p 705]
+# https://books.google.com/books?id=K7j41z0aC5wC&pg=PA705
+#
+# The Defence (Amendment of Laws No. 120) Regulations changed the time
+# to GMT+3 at midnight on 31 July 1942.
+# [Kenya Official Gazette Supplement No. 32, 1942-07-21, p 331]
+# https://books.google.com/books?hl=zh-TW&id=c_E-AQAAIAAJ&pg=PA331
+# The provision of the 1936 ordinance was not repealed and was later
+# incorporated in the Interpretation and General Clauses Ordinance in 1948.
+# Although it was overridden by the 1942 regulations.
+# [The Laws of Kenya in force on 1948-09-21, Title I, Chapter 1, 31]
+# https://dds.crl.edu/item/217517 (p.101)
+# In 1950 the Interpretation and General Clauses Ordinance was amended to adopt
+# GMT+3 permanently as the 1942 regulations were due to expire on 10 December.
+# https://books.google.com/books?id=jvR8mUDAwR0C&pg=PA787
+# [Ordinance No. 44 of 1950, Kenya Ordinances 1950, Vol. XXIX, p 294]
+# https://books.google.com/books?id=-_dQAQAAMAAJ&pg=PA294
+
+# From Paul Eggert (2020-10-24):
+# The 1908-05-01 announcement does not give an effective date,
+# so just say "1908 May".
+
 # Zone NAME            STDOFF  RULES   FORMAT  [UNTIL]
-Zone   Africa/Nairobi  2:27:16 -       LMT     1928 Jul
-                       3:00    -       EAT     1930
-                       2:30    -       +0230   1940
-                       2:45    -       +0245   1960
+Zone   Africa/Nairobi  2:27:16 -       LMT     1908 May
+                       2:30    -       +0230   1928 Jun 30 24:00
+                       3:00    -       EAT     1930 Jan  4 24:00
+                       2:30    -       +0230   1936 Dec 31 24:00
+                       2:45    -       +0245   1942 Jul 31 24:00
                        3:00    -       EAT
 Link Africa/Nairobi Africa/Addis_Ababa  # Ethiopia
 Link Africa/Nairobi Africa/Asmara       # Eritrea
@@ -1224,8 +1318,69 @@ Zone     Africa/Windhoek 1:08:24 -       LMT     1892 
Feb 8
 # See Africa/Lagos.
 
 # Nigeria
+
+# From P Chan (2020-12-03):
+# GMT was adopted as the standard time of Lagos on 1905-07-01.
+# Lagos Weekly Record, 1905-06-24, p 3
+# 
http://ddsnext.crl.edu/titles/31558#?c=0&m=668&s=0&cv=2&r=0&xywh=1446%2C5221%2C1931%2C1235
+# says "It is officially notified that on and after the 1st of July 1905
+# Greenwich Mean Solar Time will be adopted thought the Colony and
+# Protectorate, and that it will be necessary to put all clocks 13 minutes and
+# 35 seconds back, recording local mean time."
+#
+# It seemed that Lagos returned to LMT on 1908-07-01.
+# [The Lagos Standard], 1908-07-01, p 5
+# 
http://ddsnext.crl.edu/titles/31556#?c=0&m=78&s=0&cv=4&r=0&xywh=-92%2C3590%2C3944%2C2523
+# says "Scarcely have the people become accustomed to this new time, when
+# another official notice has now appeared announcing that from and after the
+# 1st July next, return will be made to local mean time."
+#
+# From P Chan (2020-11-27):
+# On 1914-01-01, standard time of GMT+0:30 was adopted for the unified Nigeria.
+# Colonial Reports - Annual. No. 878. Nigeria. Report for 1914. (April 1916),
+# p 27
+# 
https://libsysdigi.library.illinois.edu/ilharvest/Africana/Books2011-05/3064634/3064634_1914/3064634_1914_opt.pdf#page=27
+# "On January 1st [1914], a universal standard time for Nigeria was adopted,
+# viz., half an hour fast on Greenwich mean time, corresponding to the meridian
+# 7 [degrees] 30' E. long."
+# Lloyd's Register of Shipping (1915) says "Hitherto the time observed in Lagos
+# was the local mean time. On 1st January, 1914, standard time for the whole of
+# Nigeria was introduced ... Lagos time has been advanced about 16 minutes
+# accordingly."
+#
+# In 1919, standard time was changed to GMT+1.
+# Interpretation Ordinance (Cap 2)
+# The Laws of Nigeria, Containing the Ordinances of Nigeria, in Force on the
+# 1st Day of January, 1923, Vol.I [p 16]
+# https://books.google.com/books?id=BOMrAQAAMAAJ&pg=PA16
+# "The expression 'Standard time' means standard time as used in Nigeria:
+# namely, 60 minutes in advance of Greenwich mean time.  (As amended by 18 of
+# 1919, s. 2.)"
+# From Tim Parenti (2020-12-10):
+# The Lagos Weekly Record, 1919-09-20, p 3 details discussion on the first
+# reading of this Bill by the Legislative Council of the Colony of Nigeria on
+# Thursday 1919-08-28:
+# 
http://ddsnext.crl.edu/titles/31558?terms&item_id=303484#?m=1118&c=1&s=0&cv=2&r=0&xywh=1261%2C3408%2C2994%2C1915
+# "The proposal is that the Globe should be divided into twelve zones East and
+# West of Greenwich, of one hour each, Nigeria falling into the zone with a
+# standard of one hour fast on Greenwich Mean Time.  Nigeria standard time is
+# now 30 minutes in advance of Greenwich Mean Time ... according to the new
+# proposal, standard time will be advanced another 30 minutes".  It was further
+# proposed that the firing of the time guns likewise be adjusted by 30 minutes
+# to compensate.
+# From Tim Parenti (2020-12-10), per P Chan (2020-12-11):
+# The text of Ordinance 18 of 1919, published in Nigeria Gazette, Vol 6, No 52,
+# shows that the change was assented to the following day and took effect "on
+# the 1st day of September, 1919."
+# Nigeria Gazette and Supplements 1919 Jan-Dec, Reference: 73266B-40,
+# img 245-246
+# 
https://microform.digital/boa/collections/77/volumes/539/nigeria-lagos-1887-1919
+
 # Zone NAME            STDOFF  RULES   FORMAT  [UNTIL]
-Zone   Africa/Lagos    0:13:36 -       LMT     1919 Sep
+Zone   Africa/Lagos    0:13:35 -       LMT     1905 Jul  1
+                       0:00    -       GMT     1908 Jul  1
+                       0:13:35 -       LMT     1914 Jan  1
+                       0:30    -       +0030   1919 Sep  1
                        1:00    -       WAT
 Link Africa/Lagos Africa/Bangui             # Central African Republic
 Link Africa/Lagos Africa/Brazzaville # Rep. of the Congo
@@ -1298,8 +1453,21 @@ Zone     Africa/Sao_Tome  0:26:56 -      LMT     1884
 # See Africa/Abidjan.
 
 # Seychelles
+
+# From P Chan (2020-11-27):
+# Standard Time was adopted on 1907-01-01.
+#
+# Standard Time Ordinance (Chapter 237)
+# The Laws of Seychelles in Force on the 31st December, 1971, Vol. 6, p 571
+# https://books.google.com/books?id=efE-AQAAIAAJ&pg=PA571
+#
+# From Tim Parenti (2020-12-05):
+# A footnote on https://books.google.com/books?id=DYdDAQAAMAAJ&pg=PA1689
+# confirms that Ordinance No. 9 of 1906 "was brought into force on the 1st
+# January, 1907."
+
 # Zone NAME            STDOFF  RULES   FORMAT  [UNTIL]
-Zone   Indian/Mahe     3:41:48 -       LMT     1906 Jun # Victoria
+Zone   Indian/Mahe     3:41:48 -       LMT     1907 Jan  1 # Victoria
                        4:00    -       +04
 # From Paul Eggert (2001-05-30):
 # Aldabra, Farquhar, and Desroches, originally dependencies of the
diff --git a/contrib/tzdata/asia b/contrib/tzdata/asia
index 3ebfcb409fce..ed944130e99f 100644
--- a/contrib/tzdata/asia
+++ b/contrib/tzdata/asia
@@ -1723,40 +1723,180 @@ Zone   Asia/Baghdad    2:57:40 -       LMT     1890
 # high on my favorite-country list (and not only because my wife's
 # family is from India).
 
-# From Shanks & Pottenger:
+# From P Chan (2020-10-27), with corrections:
+#
+# 1940-1946 Supplement No. 2 to the Palestine Gazette
+# # issue page  Order No.   dated      start        end         note
+# 1 1010  729  67 of 1940 1940-05-22 1940-05-31* 1940-09-30* revoked by #2
+# 2 1013  758  73 of 1940 1940-05-31 1940-05-31  1940-09-30
+# 3 1055 1574 196 of 1940 1940-11-06 1940-11-16  1940-12-31
+# 4 1066 1811 208 of 1940 1940-12-17 1940-12-31  1941-12-31
+# 5 1156 1967 116 of 1941 1941-12-16 1941-12-31  1942-12-31* amended by #6
+# 6 1228 1608  86 of 1942 1942-10-14 1941-12-31  1942-10-31
+# 7 1256  279  21 of 1943 1943-03-18 1943-03-31  1943-10-31
+# 8 1323  249  19 of 1944 1944-03-13 1944-03-31  1944-10-31
+# 9 1402  328  20 of 1945 1945-04-05 1945-04-15  1945-10-31
+#10 1487  596  14 of 1946 1946-04-04 1946-04-15  1946-10-31
+#
+# 1948 Iton Rishmi (Official Gazette of the Provisional Government)
+# #    issue    page   dated      start       end
+#11 2             7 1948-05-20 1948-05-22 1948-10-31*
+#      ^This moved timezone to +04, replaced by #12 from 1948-08-31 24:00 GMT.
+#12 17 (Annex B) 84 1948-08-22 1948-08-31 1948-10-31
+#
+# 1949-2000 Kovetz HaTakanot (Collection of Regulations)
+# # issue page  dated      start       end            note
+#13    6  133 1949-03-23 1949-04-30  1949-10-31
+#14   80  755 1950-03-17 1950-04-15  1950-09-14
+#15  164  782 1951-03-22 1951-03-31  1951-09-29* amended by #16
+#16  206 1940 1951-09-23 ----------  1951-10-22* amended by #17
+#17  212   78 1951-10-19 ----------  1951-11-10
+#18  254  652 1952-03-03 1952-04-19  1952-09-27* amended by #19
+#19  300   11 1952-09-15 ----------  1952-10-18
+#20  348  817 1953-03-03 1953-04-11  1953-09-12
+#21  420  385 1954-02-17 1954-06-12  1954-09-11
+#22  497  548 1955-01-14 1955-06-11  1955-09-10
+#23  591  608 1956-03-12 1956-06-02  1956-09-29
+#24  680  957 1957-02-08 1957-04-27  1957-09-21
+#25 3192 1418 1974-06-28 1974-07-06  1974-10-12
+#26 3322 1389 1975-04-03 1975-04-19  1975-08-30
+#27 4146 2089 1980-07-15 1980-08-02  1980-09-13
+#28 4604 1081 1984-02-22 1984-05-05* 1984-08-25* revoked by #29
+#29 4619 1312 1984-04-06 1984-05-05  1984-08-25
+#30 4744  475 1984-12-23 1985-04-13  1985-09-14* amended by #31
+#31 4851 1848 1985-08-18 ----------  1985-08-31
+#32 4932  899 1986-04-22 1986-05-17  1986-09-06
+#33 5013  580 1987-02-15 1987-04-18* 1987-08-22* revoked by #34
+#34 5021  744 1987-03-30 1987-04-14  1987-09-12
+#35 5096  659 1988-02-14 1988-04-09  1988-09-03
+#36 5167  514 1989-02-03 1989-04-29  1989-09-02
+#37 5248  375 1990-01-23 1990-03-24  1990-08-25
+#38 5335  612 1991-02-10 1991-03-09* 1991-08-31         amended by #39
+#                       1992-03-28  1992-09-05
+#39 5339  709 1991-03-04 1991-03-23  ----------
+#40 5506  503 1993-02-18 1993-04-02  1993-09-05
+#                       1994-04-01  1994-08-28
+#                       1995-03-31  1995-09-03
+#41 5731  438 1996-01-01 1996-03-14  1996-09-15
+#                       1997-03-13* 1997-09-18* overridden by 1997 Temp Prov
+#                       1998-03-19* 1998-09-17* revoked by #42
+#42 5853 1243 1997-09-18 1998-03-19  1998-09-05
+#43 5937   77 1998-10-18 1999-04-02  1999-09-03
+#                       2000-04-14* 2000-09-15* revoked by #44
+#                       2001-04-13* 2001-09-14* revoked by #44
+#44 6024   39 2000-03-14 2000-04-14  2000-10-22* overridden by 2000 Temp Prov
+#                       2001-04-06* 2001-10-10* overridden by 2000 Temp Prov
+#                       2002-03-29* 2002-10-29* overridden by 2000 Temp Prov
+#
+# These are laws enacted by the Knesset since the Minister could only alter the
+# transition dates at least six months in advanced under the 1992 Law.
+#                              dated           start           end
+# 1997 Temporary Provisions    1997-03-06      1997-03-20      1997-09-13
+# 2000 Temporary Provisions    2000-07-28      ----------      2000-10-06
+#                                              2001-04-09      2001-09-24
+#                                              2002-03-29      2002-10-07
+#                                              2003-03-28      2003-10-03
+#                                              2004-04-07      2004-09-22
+# Note:
+# Transition times in 1940-1957 (#1-#24) were midnight GMT,
+# in 1974-1998 (#25-#42 and the 1997 Temporary Provisions) were midnight,
+# in 1999-April 2000 (#43,#44) were 02:00,
+# in the 2000 Temporary Provisions were 01:00.
+#
+# -----------------------------------------------------------------------------
+# Links:
+# 1 
https://findit.library.yale.edu/images_layout/view?parentoid=15537490&increment=687
+# 2 
https://findit.library.yale.edu/images_layout/view?parentoid=15537490&increment=716
+# 3 
https://findit.library.yale.edu/images_layout/view?parentoid=15537491&increment=721
+# 4 
https://findit.library.yale.edu/images_layout/view?parentoid=15537491&increment=958
+# 5 
https://findit.library.yale.edu/images_layout/view?parentoid=15537502&increment=558
+# 6 
https://findit.library.yale.edu/images_layout/view?parentoid=15537511&increment=105
+# 7 
https://findit.library.yale.edu/images_layout/view?parentoid=15537516&increment=278
+# 8 
https://findit.library.yale.edu/images_layout/view?parentoid=15537522&increment=248
+# 9 
https://findit.library.yale.edu/images_layout/view?parentoid=15537530&increment=329
+#10 
https://findit.library.yale.edu/images_layout/view?parentoid=15537537&increment=601
+#11 https://www.nevo.co.il/law_word/law12/er-002.pdf#page=3
+#12 https://www.nevo.co.il/law_word/law12/er-017-t2.pdf#page=4
+#13 https://www.nevo.co.il/law_word/law06/tak-0006.pdf#page=3
+#14 https://www.nevo.co.il/law_word/law06/tak-0080.pdf#page=7
+#15 https://www.nevo.co.il/law_word/law06/tak-0164.pdf#page=10
+#16 https://www.nevo.co.il/law_word/law06/tak-0206.pdf#page=4
+#17 https://www.nevo.co.il/law_word/law06/tak-0212.pdf#page=2
+#18 https://www.nevo.co.il/law_word/law06/tak-0254.pdf#page=4
+#19 https://www.nevo.co.il/law_word/law06/tak-0300.pdf#page=5
+#20 https://www.nevo.co.il/law_word/law06/tak-0348.pdf#page=3
+#21 https://www.nevo.co.il/law_word/law06/tak-0420.pdf#page=5
+#22 https://www.nevo.co.il/law_word/law06/tak-0497.pdf#page=10
+#23 https://www.nevo.co.il/law_word/law06/tak-0591.pdf#page=6
+#24 https://www.nevo.co.il/law_word/law06/tak-0680.pdf#page=3
+#25 https://www.nevo.co.il/law_word/law06/tak-3192.pdf#page=2
+#26 https://www.nevo.co.il/law_word/law06/tak-3322.pdf#page=5
+#27 https://www.nevo.co.il/law_word/law06/tak-4146.pdf#page=2
+#28 https://www.nevo.co.il/law_word/law06/tak-4604.pdf#page=7
+#29 https://www.nevo.co.il/law_word/law06/tak-4619.pdf#page=2
+#30 https://www.nevo.co.il/law_word/law06/tak-4744.pdf#page=11
+#31 https://www.nevo.co.il/law_word/law06/tak-4851.pdf#page=2
+#32 https://www.nevo.co.il/law_word/law06/tak-4932.pdf#page=19
+#33 https://www.nevo.co.il/law_word/law06/tak-5013.pdf#page=8
+#34 https://www.nevo.co.il/law_word/law06/tak-5021.pdf#page=8
+#35 https://www.nevo.co.il/law_word/law06/tak-5096.pdf#page=3
+#36 https://www.nevo.co.il/law_word/law06/tak-5167.pdf#page=2
+#37 https://www.nevo.co.il/law_word/law06/tak-5248.pdf#page=7
+#38 https://www.nevo.co.il/law_word/law06/tak-5335.pdf#page=6
+#39 https://www.nevo.co.il/law_word/law06/tak-5339.pdf#page=7
+#40 https://www.nevo.co.il/law_word/law06/tak-5506.pdf#page=19
+#41 https://www.nevo.co.il/law_word/law06/tak-5731.pdf#page=2
+#42 https://www.nevo.co.il/law_word/law06/tak-5853.pdf#page=3
+#43 https://www.nevo.co.il/law_word/law06/tak-5937.pdf#page=9
+#44 https://www.nevo.co.il/law_word/law06/tak-6024.pdf#page=4
+#
+# Time Determination (Temporary Provisions) Law, 1997
+# https://www.nevo.co.il/law_html/law19/p201_003.htm
+#
+# Time Determination (Temporary Provisions) Law, 2000
+# https://www.nevo.co.il/law_html/law19/p201_004.htm
+#
+# Time Determination Law, 1992 and amendments
+# https://www.nevo.co.il/law_html/law01/p201_002.htm
+# 
https://main.knesset.gov.il/Activity/Legislation/Laws/Pages/LawPrimary.aspx?lawitemid=2001174
+
+# From Paul Eggert (2020-10-27):
+# Several of the midnight transitions mentioned above are ambiguous;
+# are they 00:00, 00:00s, 24:00, or 24:00s?  When resolving these ambiguities,
+# try to minimize changes from previous tzdb versions, for lack of better info.
+# Commentary from previous versions is included below, to help explain this.
+
 # Rule NAME    FROM    TO      -       IN      ON      AT      SAVE    LETTER/S
-Rule   Zion    1940    only    -       Jun      1      0:00    1:00    D
-Rule   Zion    1942    1944    -       Nov      1      0:00    0       S
-Rule   Zion    1943    only    -       Apr      1      2:00    1:00    D
-Rule   Zion    1944    only    -       Apr      1      0:00    1:00    D
-Rule   Zion    1945    only    -       Apr     16      0:00    1:00    D
-Rule   Zion    1945    only    -       Nov      1      2:00    0       S
-Rule   Zion    1946    only    -       Apr     16      2:00    1:00    D
-Rule   Zion    1946    only    -       Nov      1      0:00    0       S
-Rule   Zion    1948    only    -       May     23      0:00    2:00    DD
-Rule   Zion    1948    only    -       Sep      1      0:00    1:00    D
-Rule   Zion    1948    1949    -       Nov      1      2:00    0       S
-Rule   Zion    1949    only    -       May      1      0:00    1:00    D
-Rule   Zion    1950    only    -       Apr     16      0:00    1:00    D
-Rule   Zion    1950    only    -       Sep     15      3:00    0       S
-Rule   Zion    1951    only    -       Apr      1      0:00    1:00    D
-Rule   Zion    1951    only    -       Nov     11      3:00    0       S
-Rule   Zion    1952    only    -       Apr     20      2:00    1:00    D
-Rule   Zion    1952    only    -       Oct     19      3:00    0       S
-Rule   Zion    1953    only    -       Apr     12      2:00    1:00    D
-Rule   Zion    1953    only    -       Sep     13      3:00    0       S
-Rule   Zion    1954    only    -       Jun     13      0:00    1:00    D
-Rule   Zion    1954    only    -       Sep     12      0:00    0       S
-Rule   Zion    1955    only    -       Jun     11      2:00    1:00    D
-Rule   Zion    1955    only    -       Sep     11      0:00    0       S
-Rule   Zion    1956    only    -       Jun      3      0:00    1:00    D
-Rule   Zion    1956    only    -       Sep     30      3:00    0       S
-Rule   Zion    1957    only    -       Apr     29      2:00    1:00    D
-Rule   Zion    1957    only    -       Sep     22      0:00    0       S
-Rule   Zion    1974    only    -       Jul      7      0:00    1:00    D
-Rule   Zion    1974    only    -       Oct     13      0:00    0       S
-Rule   Zion    1975    only    -       Apr     20      0:00    1:00    D
-Rule   Zion    1975    only    -       Aug     31      0:00    0       S
+Rule   Zion    1940    only    -       May     31      24:00u  1:00    D
+Rule   Zion    1940    only    -       Sep     30      24:00u  0       S
+Rule   Zion    1940    only    -       Nov     16      24:00u  1:00    D
+Rule   Zion    1942    1946    -       Oct     31      24:00u  0       S
+Rule   Zion    1943    1944    -       Mar     31      24:00u  1:00    D
+Rule   Zion    1945    1946    -       Apr     15      24:00u  1:00    D
+Rule   Zion    1948    only    -       May     22      24:00u  2:00    DD
+Rule   Zion    1948    only    -       Aug     31      24:00u  1:00    D
+Rule   Zion    1948    1949    -       Oct     31      24:00u  0       S
+Rule   Zion    1949    only    -       Apr     30      24:00u  1:00    D
+Rule   Zion    1950    only    -       Apr     15      24:00u  1:00    D
+Rule   Zion    1950    only    -       Sep     14      24:00u  0       S
+Rule   Zion    1951    only    -       Mar     31      24:00u  1:00    D
+Rule   Zion    1951    only    -       Nov     10      24:00u  0       S
+Rule   Zion    1952    only    -       Apr     19      24:00u  1:00    D
+Rule   Zion    1952    only    -       Oct     18      24:00u  0       S
+Rule   Zion    1953    only    -       Apr     11      24:00u  1:00    D
+Rule   Zion    1953    only    -       Sep     12      24:00u  0       S
+Rule   Zion    1954    only    -       Jun     12      24:00u  1:00    D
+Rule   Zion    1954    only    -       Sep     11      24:00u  0       S
+Rule   Zion    1955    only    -       Jun     11      24:00u  1:00    D
+Rule   Zion    1955    only    -       Sep     10      24:00u  0       S
+Rule   Zion    1956    only    -       Jun      2      24:00u  1:00    D
+Rule   Zion    1956    only    -       Sep     29      24:00u  0       S
+Rule   Zion    1957    only    -       Apr     27      24:00u  1:00    D
+Rule   Zion    1957    only    -       Sep     21      24:00u  0       S
+Rule   Zion    1974    only    -       Jul      6      24:00   1:00    D
+Rule   Zion    1974    only    -       Oct     12      24:00   0       S
+Rule   Zion    1975    only    -       Apr     19      24:00   1:00    D
+Rule   Zion    1975    only    -       Aug     30      24:00   0       S
 
 # From Alois Treindl (2019-03-06):
 # http://www.moin.gov.il/Documents/שעון%20קיץ/clock-50-years-7-2014.pdf
@@ -1769,25 +1909,24 @@ Rule    Zion    1975    only    -       Aug     31      
0:00    0       S
 # From Paul Eggert (2019-03-06):
 # Also see this thread about the moin.gov.il URL:
 # https://mm.icann.org/pipermail/tz/2018-November/027194.html
-Rule   Zion    1980    only    -       Aug      2      0:00    1:00    D
-Rule   Zion    1980    only    -       Sep     13      1:00    0       S
-Rule   Zion    1984    only    -       May      5      0:00    1:00    D
-Rule   Zion    1984    only    -       Aug     25      1:00    0       S
-
-# From Shanks & Pottenger:
-Rule   Zion    1985    only    -       Apr     14      0:00    1:00    D
-Rule   Zion    1985    only    -       Sep     15      0:00    0       S
-Rule   Zion    1986    only    -       May     18      0:00    1:00    D
-Rule   Zion    1986    only    -       Sep      7      0:00    0       S
-Rule   Zion    1987    only    -       Apr     15      0:00    1:00    D
-Rule   Zion    1987    only    -       Sep     13      0:00    0       S
+Rule   Zion    1980    only    -       Aug      2      24:00s  1:00    D
+Rule   Zion    1980    only    -       Sep     13      24:00s  0       S
+Rule   Zion    1984    only    -       May      5      24:00s  1:00    D
+Rule   Zion    1984    only    -       Aug     25      24:00s  0       S
+
+Rule   Zion    1985    only    -       Apr     13      24:00   1:00    D
+Rule   Zion    1985    only    -       Aug     31      24:00   0       S
+Rule   Zion    1986    only    -       May     17      24:00   1:00    D
+Rule   Zion    1986    only    -       Sep      6      24:00   0       S
+Rule   Zion    1987    only    -       Apr     14      24:00   1:00    D
+Rule   Zion    1987    only    -       Sep     12      24:00   0       S
 
 # From Avigdor Finkelstein (2014-03-05):
 # I check the Parliament (Knesset) records and there it's stated that the
 # [1988] transition should take place on Saturday night, when the Sabbath
 # ends and changes to Sunday.
-Rule   Zion    1988    only    -       Apr     10      0:00    1:00    D
-Rule   Zion    1988    only    -       Sep      4      0:00    0       S
+Rule   Zion    1988    only    -       Apr      9      24:00   1:00    D
+Rule   Zion    1988    only    -       Sep      3      24:00   0       S
 
 # From Ephraim Silverberg
 # (1997-03-04, 1998-03-16, 1998-12-28, 2000-01-17, 2000-07-25, 2004-12-22,
@@ -1817,14 +1956,14 @@ Rule    Zion    1988    only    -       Sep      4      
0:00    0       S
 # (the eve of the 7th of Tishrei in the lunar Hebrew calendar).
 
 # Rule NAME    FROM    TO      -       IN      ON      AT      SAVE    LETTER/S
-Rule   Zion    1989    only    -       Apr     30      0:00    1:00    D
-Rule   Zion    1989    only    -       Sep      3      0:00    0       S
-Rule   Zion    1990    only    -       Mar     25      0:00    1:00    D
-Rule   Zion    1990    only    -       Aug     26      0:00    0       S
-Rule   Zion    1991    only    -       Mar     24      0:00    1:00    D
-Rule   Zion    1991    only    -       Sep      1      0:00    0       S
-Rule   Zion    1992    only    -       Mar     29      0:00    1:00    D
-Rule   Zion    1992    only    -       Sep      6      0:00    0       S
+Rule   Zion    1989    only    -       Apr     29      24:00   1:00    D
+Rule   Zion    1989    only    -       Sep      2      24:00   0       S
+Rule   Zion    1990    only    -       Mar     24      24:00   1:00    D
+Rule   Zion    1990    only    -       Aug     25      24:00   0       S
+Rule   Zion    1991    only    -       Mar     23      24:00   1:00    D
+Rule   Zion    1991    only    -       Aug     31      24:00   0       S
+Rule   Zion    1992    only    -       Mar     28      24:00   1:00    D
+Rule   Zion    1992    only    -       Sep      5      24:00   0       S
 Rule   Zion    1993    only    -       Apr      2      0:00    1:00    D
 Rule   Zion    1993    only    -       Sep      5      0:00    0       S
 
@@ -1853,10 +1992,10 @@ Rule    Zion    1995    only    -       Sep      3      
0:00    0       S
 #       where YYYY is the relevant year.
 
 # Rule NAME    FROM    TO      -       IN      ON      AT      SAVE    LETTER/S
-Rule   Zion    1996    only    -       Mar     15      0:00    1:00    D
-Rule   Zion    1996    only    -       Sep     16      0:00    0       S
-Rule   Zion    1997    only    -       Mar     21      0:00    1:00    D
-Rule   Zion    1997    only    -       Sep     14      0:00    0       S
+Rule   Zion    1996    only    -       Mar     14      24:00   1:00    D
+Rule   Zion    1996    only    -       Sep     15      24:00   0       S
+Rule   Zion    1997    only    -       Mar     20      24:00   1:00    D
+Rule   Zion    1997    only    -       Sep     13      24:00   0       S
 Rule   Zion    1998    only    -       Mar     20      0:00    1:00    D
 Rule   Zion    1998    only    -       Sep      6      0:00    0       S
 Rule   Zion    1999    only    -       Apr      2      2:00    1:00    D
@@ -1908,14 +2047,15 @@ Rule    Zion    2010    only    -       Sep     12      
2:00    0       S
 Rule   Zion    2011    only    -       Oct      2      2:00    0       S
 Rule   Zion    2012    only    -       Sep     23      2:00    0       S
 
-# From Ephraim Silverberg (2013-06-27):
-# On June 23, 2013, the Israeli government approved changes to the
-# Time Decree Law.  The next day, the changes passed the First Reading
-# in the Knesset.  The law is expected to pass the Second and Third
-# (final) Readings by the beginning of September 2013.
-#
-# As of 2013, DST starts at 02:00 on the Friday before the last Sunday
-# in March.  DST ends at 02:00 on the last Sunday of October.
+# From Ephraim Silverberg (2020-10-26):
+# The current time law (2013) from the State of Israel can be viewed
+# (in Hebrew) at:
+# ftp://ftp.cs.huji.ac.il/pub/tz/israel/announcements/2013+law.pdf
+# It translates to:
+# Every year, in the period from the Friday before the last Sunday in
+# the month of March at 02:00 a.m. until the last Sunday of the month
+# of October at 02:00 a.m., Israel Time will be advanced an additional
+# hour such that it will be UTC+3.
 
 # Rule NAME    FROM    TO      -       IN      ON      AT      SAVE    LETTER/S
 Rule   Zion    2013    max     -       Mar     Fri>=23 2:00    1:00    D
diff --git a/contrib/tzdata/australasia b/contrib/tzdata/australasia
index aa7ab7f23a08..cf8a0638f831 100644
--- a/contrib/tzdata/australasia
+++ b/contrib/tzdata/australasia
@@ -14,16 +14,13 @@
 # Please see the notes below for the controversy about "EST" versus "AEST" etc.
 
 # Rule NAME    FROM    TO      -       IN      ON      AT      SAVE    LETTER/S
-Rule   Aus     1917    only    -       Jan      1      0:01    1:00    D
-Rule   Aus     1917    only    -       Mar     25      2:00    0       S
-Rule   Aus     1942    only    -       Jan      1      2:00    1:00    D
-Rule   Aus     1942    only    -       Mar     29      2:00    0       S
-Rule   Aus     1942    only    -       Sep     27      2:00    1:00    D
-Rule   Aus     1943    1944    -       Mar     lastSun 2:00    0       S
-Rule   Aus     1943    only    -       Oct      3      2:00    1:00    D
-# Go with Whitman and the Australian National Standards Commission, which
-# says W Australia didn't use DST in 1943/1944.  Ignore Whitman's claim that
-# 1944/1945 was just like 1943/1944.
+Rule   Aus     1917    only    -       Jan      1      2:00s   1:00    D
+Rule   Aus     1917    only    -       Mar     lastSun 2:00s   0       S
+Rule   Aus     1942    only    -       Jan      1      2:00s   1:00    D
+Rule   Aus     1942    only    -       Mar     lastSun 2:00s   0       S
+Rule   Aus     1942    only    -       Sep     27      2:00s   1:00    D
+Rule   Aus     1943    1944    -       Mar     lastSun 2:00s   0       S
+Rule   Aus     1943    only    -       Oct      3      2:00s   1:00    D
 
 # Zone NAME            STDOFF  RULES   FORMAT  [UNTIL]
 # Northern Territory
@@ -115,8 +112,12 @@ Zone Australia/Adelaide    9:14:20 -       LMT     1895 Feb
 # says King Island didn't observe DST from WWII until late 1971.
 #
 # Rule NAME    FROM    TO      -       IN      ON      AT      SAVE    LETTER/S
+Rule   AT      1916    only    -       Oct     Sun>=1  2:00s   1:00    D
+Rule   AT      1917    only    -       Mar     lastSun 2:00s   0       S
+Rule   AT      1917    1918    -       Oct     Sun>=22 2:00s   1:00    D
+Rule   AT      1918    1919    -       Mar     Sun>=1  2:00s   0       S
 Rule   AT      1967    only    -       Oct     Sun>=1  2:00s   1:00    D
-Rule   AT      1968    only    -       Mar     lastSun 2:00s   0       S
+Rule   AT      1968    only    -       Mar     Sun>=29 2:00s   0       S
 Rule   AT      1968    1985    -       Oct     lastSun 2:00s   1:00    D
 Rule   AT      1969    1971    -       Mar     Sun>=8  2:00s   0       S
 Rule   AT      1972    only    -       Feb     lastSun 2:00s   0       S
@@ -136,15 +137,9 @@ Rule       AT      2007    only    -       Mar     lastSun 
2:00s   0       S
 Rule   AT      2008    max     -       Apr     Sun>=1  2:00s   0       S
 # Zone NAME            STDOFF  RULES   FORMAT  [UNTIL]
 Zone Australia/Hobart  9:49:16 -       LMT     1895 Sep
-                       10:00   -       AEST    1916 Oct  1  2:00
-                       10:00   1:00    AEDT    1917 Feb
+                       10:00   AT      AE%sT   1919 Oct 24
                        10:00   Aus     AE%sT   1967
                        10:00   AT      AE%sT
-Zone Australia/Currie  9:35:28 -       LMT     1895 Sep
-                       10:00   -       AEST    1916 Oct  1  2:00
-                       10:00   1:00    AEDT    1917 Feb
-                       10:00   Aus     AE%sT   1971 Jul
-                       10:00   AT      AE%sT
 
 # Victoria
 # Rule NAME    FROM    TO      -       IN      ON      AT      SAVE    LETTER/S
@@ -873,13 +868,36 @@ Zone      Pacific/Wake    11:06:28 -      LMT     1901
 
 
 # Vanuatu
+
+# From P Chan (2020-11-27):
+# Joint Daylight Saving Regulation No 59 of 1973
+# New Hebrides Condominium Gazette No 336. December 1973
+# http://www.paclii.org/vu/other/VUNHGovGaz//1973/11.pdf#page=15
+#
+# Joint Daylight Saving (Repeal) Regulation No 10 of 1974
+# New Hebrides Condominium Gazette No 336. March 1974
+# http://www.paclii.org/vu/other/VUNHGovGaz//1974/3.pdf#page=11
+#
+# Summer Time Act No. 35 of 1982 [commenced 1983-09-01]
+# http://www.paclii.org/vu/other/VUGovGaz/1982/32.pdf#page=48
+#
+# Summer Time Act (Cap 157)
+# Laws of the Republic of Vanuatu Revised Edition 1988
+# 
http://www.paclii.org/cgi-bin/sinodisp/vu/legis/consol_act1988/sta147/sta147.html
+#
+# Summer Time (Amendment) Act No. 6 of 1991 [commenced 1991-11-11]
+# http://www.paclii.org/vu/legis/num_act/sta1991227/
+#
+# Summer Time (Repeal) Act No. 4 of 1993 [commenced 1993-05-03]
+# http://www.paclii.org/vu/other/VUGovGaz/1993/15.pdf#page=59
+
 # Rule NAME    FROM    TO      -       IN      ON      AT      SAVE    LETTER/S
-Rule   Vanuatu 1983    only    -       Sep     25      0:00    1:00    -
-Rule   Vanuatu 1984    1991    -       Mar     Sun>=23 0:00    0       -
-Rule   Vanuatu 1984    only    -       Oct     23      0:00    1:00    -
-Rule   Vanuatu 1985    1991    -       Sep     Sun>=23 0:00    1:00    -
-Rule   Vanuatu 1992    1993    -       Jan     Sun>=23 0:00    0       -
-Rule   Vanuatu 1992    only    -       Oct     Sun>=23 0:00    1:00    -
+Rule   Vanuatu 1973    only    -       Dec     22      12:00u  1:00    -
+Rule   Vanuatu 1974    only    -       Mar     30      12:00u  0       -
+Rule   Vanuatu 1983    1991    -       Sep     Sat>=22 24:00   1:00    -
+Rule   Vanuatu 1984    1991    -       Mar     Sat>=22 24:00   0       -
+Rule   Vanuatu 1992    1993    -       Jan     Sat>=22 24:00   0       -
+Rule   Vanuatu 1992    only    -       Oct     Sat>=22 24:00   1:00    -
 # Zone NAME            STDOFF  RULES   FORMAT  [UNTIL]
 Zone   Pacific/Efate   11:13:16 -      LMT     1912 Jan 13 # Vila
                        11:00   Vanuatu +11/+12
@@ -958,6 +976,25 @@ Zone       Pacific/Wallis  12:15:20 -      LMT     1901
 # Electronic Journal of Australian and New Zealand History (1997-03-03)
 # http://www.jcu.edu.au/aff/history/reviews/davison.htm
 
+# From P Chan (2020-11-20):
+# Daylight Saving Act 1916 (No. 40 of 1916) [1916-12-21, commenced 1917-01-01]
+# http://classic.austlii.edu.au/au/legis/cth/num_act/dsa1916401916192/
+#
+# Daylight Saving Repeal Act 1917 (No. 35 of 1917) [1917-09-25]
+# http://classic.austlii.edu.au/au/legis/cth/num_act/dsra1917351917243/
+#
+# Statutory Rules 1941, No. 323 [1941-12-24]
+# https://www.legislation.gov.au/Details/C1941L00323
+#
+# Statutory Rules 1942, No. 392 [1942-09-10]
+# https://www.legislation.gov.au/Details/C1942L00392
+#
+# Statutory Rules 1943, No. 241 [1943-09-29]
+# https://www.legislation.gov.au/Details/C1943L00241
+#
+# All transition times should be 02:00 standard time.
+
+
 # From Paul Eggert (2005-12-08):
 # Implementation Dates of Daylight Saving Time within Australia
 # http://www.bom.gov.au/climate/averages/tables/dst_times.shtml
@@ -1350,6 +1387,27 @@ Zone     Pacific/Wallis  12:15:20 -      LMT     1901
 
 # Tasmania
 
+# From P Chan (2020-11-20):
+# Tasmania observed DST in 1916-1919.
+#
+# Daylight Saving Act, 1916 (7 Geo V, No 2) [1916-09-22]
+# http://classic.austlii.edu.au/au/legis/tas/num_act/tdsa19167gvn2267/
+#
+# Daylight Saving Amendment Act, 1917 (8 Geo V, No 5) [1917-10-01]
+# http://classic.austlii.edu.au/au/legis/tas/num_act/tdsaa19178gvn5347/
+#
+# Daylight Saving Act Repeal Act, 1919 (10 Geo V, No 9) [1919-10-24]
+# http://classic.austlii.edu.au/au/legis/tas/num_act/tdsara191910gvn9339/
+#
+# King Island is mentioned in the 1967 Act but not the 1968 Act.
+# Therefore it possibly observed DST from 1968/69.
+#
+# Daylight Saving Act 1967 (No. 33 of 1967) [1967-09-22]
+# http://classic.austlii.edu.au/au/legis/tas/num_act/dsa196733o1967211/
+#
+# Daylight Saving Act 1968 (No. 42 of 1968) [1968-10-15]
+# http://classic.austlii.edu.au/au/legis/tas/num_act/dsa196842o1968211/
+
 # The rules for 1967 through 1991 were reported by George Shepherd
 # via Simon Woodhead via Robert Elz (1991-03-06):
 # #  The state of TASMANIA.. [Courtesy Tasmanian Dept of Premier + Cabinet ]
diff --git a/contrib/tzdata/backward b/contrib/tzdata/backward
index e13ae527a9e8..0c55be221df1 100644
--- a/contrib/tzdata/backward
+++ b/contrib/tzdata/backward
@@ -49,6 +49,7 @@ Link  Atlantic/Faroe          Atlantic/Faeroe
 Link   Europe/Oslo             Atlantic/Jan_Mayen
 Link   Australia/Sydney        Australia/ACT
 Link   Australia/Sydney        Australia/Canberra
+Link   Australia/Hobart        Australia/Currie
 Link   Australia/Lord_Howe     Australia/LHI
 Link   Australia/Sydney        Australia/NSW
 Link   Australia/Darwin        Australia/North
diff --git a/contrib/tzdata/backzone b/contrib/tzdata/backzone
index 563aff606155..3ce7277314c0 100644
--- a/contrib/tzdata/backzone
+++ b/contrib/tzdata/backzone
@@ -623,6 +623,12 @@ Zone Atlantic/St_Helena    -0:22:48 -      LMT     1890 # 
Jamestown
                        -0:22:48 -      JMT     1951 # Jamestown Mean Time
                         0:00   -       GMT
 
+# King Island
+Zone Australia/Currie  9:35:28 -       LMT     1895 Sep
+                       10:00   AT      AE%sT   1919 Oct 24
+                       10:00   Aus     AE%sT   1968 Oct 15
+                       10:00   AT      AE%sT
*** 471 LINES SKIPPED ***
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