git: 24eb518714f6 - releng/13.3 - contrib/tzdata: import tzdata 2024a
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Date: Mon, 05 Feb 2024 00:57:58 UTC
The branch releng/13.3 has been updated by philip:
URL: https://cgit.FreeBSD.org/src/commit/?id=24eb518714f6c681fc5fbb28170b1d74296d24f1
commit 24eb518714f6c681fc5fbb28170b1d74296d24f1
Author: Philip Paeps <philip@FreeBSD.org>
AuthorDate: 2024-02-02 02:01:39 +0000
Commit: Philip Paeps <philip@FreeBSD.org>
CommitDate: 2024-02-05 00:56:50 +0000
contrib/tzdata: import tzdata 2024a
Changes: https://github.com/eggert/tz/blob/2024a/NEWS
(cherry picked from commit 2723c7ffb7f729a1d3f7c59e7db48b0edf3d30a6)
(cherry picked from commit f4256acec1c980b7d08e9e526be6d2a7c4751f0b)
Approved by: re (karels)
---
contrib/tzdata/Makefile | 53 ++++--
contrib/tzdata/NEWS | 68 +++++++
contrib/tzdata/africa | 8 +-
contrib/tzdata/asia | 174 +++++++++++-------
contrib/tzdata/australasia | 14 +-
contrib/tzdata/checknow.awk | 2 +-
contrib/tzdata/etcetera | 2 +-
contrib/tzdata/europe | 29 ++-
contrib/tzdata/leap-seconds.list | 373 +++++++++++++--------------------------
contrib/tzdata/leapseconds | 19 +-
contrib/tzdata/leapseconds.awk | 11 +-
contrib/tzdata/northamerica | 29 +--
contrib/tzdata/southamerica | 5 +-
contrib/tzdata/theory.html | 37 ++--
contrib/tzdata/version | 2 +-
contrib/tzdata/zishrink.awk | 98 ++++++----
contrib/tzdata/zonenow.tab | 4 +-
17 files changed, 507 insertions(+), 421 deletions(-)
diff --git a/contrib/tzdata/Makefile b/contrib/tzdata/Makefile
index 4e45f93b915c..d48354c72df4 100644
--- a/contrib/tzdata/Makefile
+++ b/contrib/tzdata/Makefile
@@ -53,7 +53,7 @@ DATAFORM= main
LOCALTIME= Factory
-# The POSIXRULES macro controls interpretation of POSIX-like TZ
+# The POSIXRULES macro controls interpretation of POSIX-2017.1-like TZ
# settings like TZ='EET-2EEST' that lack DST transition rules.
# If POSIXRULES is '-', no template is installed; this is the default.
# Any other value for POSIXRULES is obsolete and should not be relied on, as:
@@ -274,7 +274,7 @@ LDLIBS=
# -DTZ_DOMAINDIR=\"/path\" to use "/path" for gettext directory;
# the default is system-supplied, typically "/usr/lib/locale"
# -DTZDEFRULESTRING=\",date/time,date/time\" to default to the specified
-# DST transitions for POSIX-style TZ strings lacking them,
+# DST transitions for POSIX.1-2017-style TZ strings lacking them,
# in the usual case where POSIXRULES is '-'. If not specified,
# TZDEFRULESTRING defaults to US rules for future DST transitions.
# This mishandles some past timestamps, as US DST rules have changed.
@@ -340,9 +340,10 @@ GCC_DEBUG_FLAGS = -DGCC_LINT -g3 -O3 -fno-common \
# guess TM_GMTOFF from other macros; define NO_TM_GMTOFF to suppress this.
# Similarly, if your system has a "zone abbreviation" field, define
# -DTM_ZONE=tm_zone
-# and define NO_TM_ZONE to suppress any guessing. Although these two fields
-# not required by POSIX, a future version of POSIX is planned to require them
-# and they are widely available on GNU/Linux and BSD systems.
+# and define NO_TM_ZONE to suppress any guessing.
+# Although these two fields are not required by POSIX.1-2017,
+# POSIX 202x/D4 requires them and they are widely available
+# on GNU/Linux and BSD systems.
#
# The next batch of options control support for external variables
# exported by tzcode. In practice these variables are less useful
@@ -352,7 +353,7 @@ GCC_DEBUG_FLAGS = -DGCC_LINT -g3 -O3 -fno-common \
# # -DHAVE_TZNAME=0 # do not support "tzname"
# # -DHAVE_TZNAME=1 # support "tzname", which is defined by system library
# # -DHAVE_TZNAME=2 # support and define "tzname"
-# # to the "CFLAGS=" line. "tzname" is required by POSIX 1988 and later.
+# # to the "CFLAGS=" line. "tzname" is required by POSIX.1-1988 and later.
# # If not defined, the code attempts to guess HAVE_TZNAME from other macros.
# # Warning: unless time_tz is also defined, HAVE_TZNAME=1 can cause
# # crashes when combined with some platforms' standard libraries,
@@ -362,8 +363,8 @@ GCC_DEBUG_FLAGS = -DGCC_LINT -g3 -O3 -fno-common \
# # -DUSG_COMPAT=0 # do not support
# # -DUSG_COMPAT=1 # support, and variables are defined by system library
# # -DUSG_COMPAT=2 # support and define variables
-# # to the "CFLAGS=" line; "timezone" and "daylight" are inspired by
-# # Unix Systems Group code and are required by POSIX 2008 (with XSI) and later.
+# # to the "CFLAGS=" line; "timezone" and "daylight" are inspired by Unix
+# # Systems Group code and are required by POSIX.1-2008 and later (with XSI).
# # If not defined, the code attempts to guess USG_COMPAT from other macros.
# #
# # To support the external variable "altzone", add
@@ -427,7 +428,7 @@ GCC_DEBUG_FLAGS = -DGCC_LINT -g3 -O3 -fno-common \
# The name of a POSIX-like library archiver, its flags, C compiler,
# linker flags, and 'make' utility. Ordinarily the defaults suffice.
-# The commented-out values are the defaults specified by POSIX 202x/D3.
+# The commented-out values are the defaults specified by POSIX.1-202x/D4.
#AR = ar
#ARFLAGS = -rv
#CC = c17
@@ -439,6 +440,12 @@ GCC_DEBUG_FLAGS = -DGCC_LINT -g3 -O3 -fno-common \
LEAPSECONDS=
+# Where to fetch leap-seconds.list from.
+leaplist_URI = \
+ https://hpiers.obspm.fr/iers/bul/bulc/ntp/leap-seconds.list
+# The file is generated by the IERS Earth Orientation Centre, in Paris.
+leaplist_TZ = Europe/Paris
+
# The zic command and its arguments.
zic= ./zic
@@ -471,7 +478,8 @@ AWK= awk
# is typically nicer if it works.
KSHELL= /bin/bash
-# Name of curl <https://curl.haxx.se/>, used for HTML validation.
+# Name of curl <https://curl.haxx.se/>, used for HTML validation
+# and to fetch leap-seconds.list from upstream.
CURL= curl
# Name of GNU Privacy Guard <https://gnupg.org/>, used to sign distributions.
@@ -718,6 +726,28 @@ leapseconds: $(LEAP_DEPS)
-f leapseconds.awk leap-seconds.list >$@.out
mv $@.out $@
+# Awk script to extract a Git-style author from leap-seconds.list comments.
+EXTRACT_AUTHOR = \
+ author_line { sub(/^.[[:space:]]*/, ""); \
+ sub(/:[[:space:]]*/, " <"); \
+ printf "%s>\n", $$0; \
+ success = 1; \
+ exit \
+ } \
+ /Questions or comments to:/ { author_line = 1 } \
+ END { exit !success }
+
+# Fetch leap-seconds.list from upstream.
+fetch-leap-seconds.list:
+ $(CURL) -OR $(leaplist_URI)
+
+# Fetch leap-seconds.list from upstream and commit it to the local repository.
+commit-leap-seconds.list: fetch-leap-seconds.list
+ author=$$($(AWK) '$(EXTRACT_AUTHOR)' leap-seconds.list) && \
+ date=$$(TZ=$(leaplist_TZ) stat -c%y leap-seconds.list) && \
+ git commit --author="$$author" --date="$$date" -m'make $@' \
+ leap-seconds.list
+
# Arguments to pass to submakes of install_data.
# They can be overridden by later submake arguments.
INSTALLARGS = \
@@ -1315,7 +1345,8 @@ zic.o: private.h tzfile.h tzdir.h version.h
.PHONY: ALL INSTALL all
.PHONY: check check_mild check_time_t_alternatives
.PHONY: check_web check_zishrink
-.PHONY: clean clean_misc dummy.zd force_tzs
+.PHONY: clean clean_misc commit-leap-seconds.list dummy.zd
+.PHONY: fetch-leap-seconds.list force_tzs
.PHONY: install install_data maintainer-clean names
.PHONY: posix_only posix_right public
.PHONY: rearguard_signatures rearguard_signatures_version
diff --git a/contrib/tzdata/NEWS b/contrib/tzdata/NEWS
index 031ba6a8a250..d407342a50e6 100644
--- a/contrib/tzdata/NEWS
+++ b/contrib/tzdata/NEWS
@@ -1,5 +1,73 @@
News for the tz database
+Release 2024a - 2024-02-01 09:28:56 -0800
+
+ Briefly:
+ Kazakhstan unifies on UTC+5 beginning 2024-03-01.
+ Palestine springs forward a week later after Ramadan.
+ zic no longer pretends to support indefinite-past DST.
+ localtime no longer mishandles Ciudad Juárez in 2422.
+
+ Changes to future timestamps
+
+ Kazakhstan unifies on UTC+5. This affects Asia/Almaty and
+ Asia/Qostanay which together represent the eastern portion of the
+ country that will transition from UTC+6 on 2024-03-01 at 00:00 to
+ join the western portion. (Thanks to Zhanbolat Raimbekov.)
+
+ Palestine springs forward a week later than previously predicted
+ in 2024 and 2025. (Thanks to Heba Hamad.) Change spring-forward
+ predictions to the second Saturday after Ramadan, not the first;
+ this also affects other predictions starting in 2039.
+
+ Changes to past timestamps
+
+ Asia/Ho_Chi_Minh's 1955-07-01 transition occurred at 01:00
+ not 00:00. (Thanks to Đoàn Trần Công Danh.)
+
+ From 1947 through 1949, Toronto's transitions occurred at 02:00
+ not 00:00. (Thanks to Chris Walton.)
+
+ In 1911 Miquelon adopted standard time on June 15, not May 15.
+
+ Changes to code
+
+ The FROM and TO columns of Rule lines can no longer be "minimum"
+ or an abbreviation of "minimum", because TZif files do not support
+ DST rules that extend into the indefinite past - although these
+ rules were supported when TZif files had only 32-bit data, this
+ stopped working when 64-bit TZif files were introduced in 1995.
+ This should not be a problem for realistic data, since DST was
+ first used in the 20th century. As a transition aid, FROM columns
+ like "minimum" are now diagnosed and then treated as if they were
+ the year 1900; this should suffice for TZif files on old systems
+ with only 32-bit time_t, and it is more compatible with bugs in
+ 2023c-and-earlier localtime.c. (Problem reported by Yoshito
+ Umaoka.)
+
+ localtime and related functions no longer mishandle some
+ timestamps that occur about 400 years after a switch to a time
+ zone with a DST schedule. In 2023d data this problem was visible
+ for some timestamps in November 2422, November 2822, etc. in
+ America/Ciudad_Juarez. (Problem reported by Gilmore Davidson.)
+
+ strftime %s now uses tm_gmtoff if available. (Problem and draft
+ patch reported by Dag-Erling Smørgrav.)
+
+ Changes to build procedure
+
+ The leap-seconds.list file is now copied from the IERS instead of
+ from its downstream counterpart at NIST, as the IERS version is
+ now in the public domain too and tends to be more up-to-date.
+ (Thanks to Martin Burnicki for liaisoning with the IERS.)
+
+ Changes to documentation
+
+ The strftime man page documents which struct tm members affect
+ which conversion specs, and that tzset is called. (Problems
+ reported by Robert Elz and Steve Summit.)
+
+
Release 2023d - 2023-12-21 20:02:24 -0800
Briefly:
diff --git a/contrib/tzdata/africa b/contrib/tzdata/africa
index 6fae18c0979f..92d823a0515c 100644
--- a/contrib/tzdata/africa
+++ b/contrib/tzdata/africa
@@ -30,6 +30,10 @@
# Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94.
# https://www.jstor.org/stable/1774359
#
+# For the 1911/1912 establishment of standard time in French possessions, see:
+# Société Française de Physique, Recueil de constantes physiques (1913),
+# page 752, 18b.
+#
# European-style abbreviations are commonly used along the Mediterranean.
# For sub-Saharan Africa abbreviations were less standardized.
# Previous editions of this database used WAT, CAT, SAT, and EAT
@@ -113,7 +117,7 @@ Zone Atlantic/Cape_Verde -1:34:04 - LMT 1912 Jan 01 2:00u # Praia
# Chad
# Zone NAME STDOFF RULES FORMAT [UNTIL]
-Zone Africa/Ndjamena 1:00:12 - LMT 1912 # N'Djamena
+Zone Africa/Ndjamena 1:00:12 - LMT 1912 Jan 1 # N'Djamena
1:00 - WAT 1979 Oct 14
1:00 1:00 WAST 1980 Mar 8
1:00 - WAT
@@ -139,7 +143,7 @@ Zone Africa/Ndjamena 1:00:12 - LMT 1912 # N'Djamena
# Inaccessible, Nightingale: uninhabited
# Zone NAME STDOFF RULES FORMAT [UNTIL]
-Zone Africa/Abidjan -0:16:08 - LMT 1912
+Zone Africa/Abidjan -0:16:08 - LMT 1912 Jan 1
0:00 - GMT
###############################################################################
diff --git a/contrib/tzdata/asia b/contrib/tzdata/asia
index 04526c196931..05683b9ebaa3 100644
--- a/contrib/tzdata/asia
+++ b/contrib/tzdata/asia
@@ -2457,18 +2457,33 @@ Zone Asia/Amman 2:23:44 - LMT 1931
# effective December 21st, 2018....
# http://adilet.zan.kz/rus/docs/P1800000817 (russian language).
+# From Zhanbolat Raimbekov (2024-01-19):
+# Kazakhstan (all parts) switching to UTC+5 on March 1, 2024
+# https://www.gov.kz/memleket/entities/mti/press/news/details/688998?lang=ru
+# [in Russian]
+# (2024-01-20): https://primeminister.kz/ru/decisions/19012024-20
+#
+# From Alexander Krivenyshev (2024-01-19):
+# According to a different news and the official web site for the Ministry of
+# Trade and Integration of the Republic of Kazakhstan:
+# https://en.inform.kz/news/kazakhstan-to-switch-to-single-hour-zone-mar-1-54ad0b/
+
# Zone NAME STDOFF RULES FORMAT [UNTIL]
#
# Almaty (formerly Alma-Ata), representing most locations in Kazakhstan
-# This includes KZ-AKM, KZ-ALA, KZ-ALM, KZ-AST, KZ-BAY, KZ-VOS, KZ-ZHA,
-# KZ-KAR, KZ-SEV, KZ-PAV, and KZ-YUZ.
+# This includes Abai/Abay (ISO 3166-2 code KZ-10), Aqmola/Akmola (KZ-11),
+# Almaty (KZ-19), Almaty city (KZ-75), Astana city (KZ-71),
+# East Kazkhstan (KZ-63), Jambyl/Zhambyl (KZ-31), Jetisu/Zhetysu (KZ-33),
+# Karaganda (KZ-35), North Kazakhstan (KZ-59), Pavlodar (KZ-55),
+# Shyumkent city (KZ-79), Turkistan (KZ-61), and Ulytau (KZ-62).
Zone Asia/Almaty 5:07:48 - LMT 1924 May 2 # or Alma-Ata
5:00 - +05 1930 Jun 21
6:00 RussiaAsia +06/+07 1991 Mar 31 2:00s
5:00 RussiaAsia +05/+06 1992 Jan 19 2:00s
6:00 RussiaAsia +06/+07 2004 Oct 31 2:00s
- 6:00 - +06
-# Qyzylorda (aka Kyzylorda, Kizilorda, Kzyl-Orda, etc.) (KZ-KZY)
+ 6:00 - +06 2024 Mar 1 0:00
+ 5:00 - +05
+# Qyzylorda (aka Kyzylorda, Kizilorda, Kzyl-Orda, etc.) (KZ-43)
Zone Asia/Qyzylorda 4:21:52 - LMT 1924 May 2
4:00 - +04 1930 Jun 21
5:00 - +05 1981 Apr 1
@@ -2481,8 +2496,7 @@ Zone Asia/Qyzylorda 4:21:52 - LMT 1924 May 2
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)
+# Qostanay (aka Kostanay, Kustanay) (KZ-39)
# The 1991/2 rules are unclear partly because of the 1997 Turgai
# reorganization.
Zone Asia/Qostanay 4:14:28 - LMT 1924 May 2
@@ -2493,9 +2507,9 @@ Zone Asia/Qostanay 4:14:28 - LMT 1924 May 2
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)
+ 6:00 - +06 2024 Mar 1 0:00
+ 5:00 - +05
+# Aqtöbe (aka Aktobe, formerly Aktyubinsk) (KZ-15)
Zone Asia/Aqtobe 3:48:40 - LMT 1924 May 2
4:00 - +04 1930 Jun 21
5:00 - +05 1981 Apr 1
@@ -2505,7 +2519,7 @@ Zone Asia/Aqtobe 3:48:40 - LMT 1924 May 2
4:00 RussiaAsia +04/+05 1992 Jan 19 2:00s
5:00 RussiaAsia +05/+06 2004 Oct 31 2:00s
5:00 - +05
-# Mangghystaū (KZ-MAN)
+# Mangghystaū (KZ-47)
# Aqtau was not founded until 1963, but it represents an inhabited region,
# so include timestamps before 1963.
Zone Asia/Aqtau 3:21:04 - LMT 1924 May 2
@@ -2517,7 +2531,7 @@ Zone Asia/Aqtau 3:21:04 - LMT 1924 May 2
5:00 RussiaAsia +05/+06 1994 Sep 25 2:00s
4:00 RussiaAsia +04/+05 2004 Oct 31 2:00s
5:00 - +05
-# Atyraū (KZ-ATY) is like Mangghystaū except it switched from
+# Atyraū (KZ-23) is like Mangghystaū except it switched from
# +04/+05 to +05/+06 in spring 1999, not fall 1994.
Zone Asia/Atyrau 3:27:44 - LMT 1924 May 2
3:00 - +03 1930 Jun 21
@@ -2528,7 +2542,7 @@ Zone Asia/Atyrau 3:27:44 - LMT 1924 May 2
5:00 RussiaAsia +05/+06 1999 Mar 28 2:00s
4:00 RussiaAsia +04/+05 2004 Oct 31 2:00s
5:00 - +05
-# West Kazakhstan (KZ-ZAP)
+# West Kazakhstan (KZ-27)
# From Paul Eggert (2016-03-18):
# The 1989 transition is from USSR act No. 227 (1989-03-14).
Zone Asia/Oral 3:25:24 - LMT 1924 May 2 # or Ural'sk
@@ -3430,19 +3444,26 @@ Zone Asia/Karachi 4:28:12 - LMT 1907
# ... winter time will begin in Palestine from Saturday 10-28-2023,
# 02:00 AM by 60 minutes back.
#
-# From Paul Eggert (2023-03-22):
+# From Heba Hamad (2024-01-25):
+# the summer time for the years 2024,2025 will begin in Palestine
+# from Saturday at 02:00 AM by 60 minutes forward as shown below:
+# year date
+# 2024 2024-04-20
+# 2025 2025-04-12
+#
+# From Paul Eggert (2024-01-25):
# For now, guess that spring and fall transitions will normally
# continue to use 2022's rules, that during DST Palestine will switch
# to standard time at 02:00 the last Saturday before Ramadan and back
-# to DST at 02:00 the first Saturday after Ramadan, and that
+# to DST at 02:00 the second Saturday after Ramadan, and that
# if the normal spring-forward or fall-back transition occurs during
# Ramadan the former is delayed and the latter advanced.
# To implement this, I predicted Ramadan-oriented transition dates for
-# 2023 through 2086 by running the following program under GNU Emacs 28.2,
+# 2026 through 2086 by running the following program under GNU Emacs 29.2,
# with the results integrated by hand into the table below.
# Predictions after 2086 are approximated without Ramadan.
#
-# (let ((islamic-year 1444))
+# (let ((islamic-year 1447))
# (require 'cal-islam)
# (while (< islamic-year 1510)
# (let ((a (calendar-islamic-to-absolute (list 9 1 islamic-year)))
@@ -3451,6 +3472,7 @@ Zone Asia/Karachi 4:28:12 - LMT 1907
# (while (/= saturday (mod (setq a (1- a)) 7)))
# (while (/= saturday (mod b 7))
# (setq b (1+ b)))
+# (setq b (+ 7 b))
# (setq a (calendar-gregorian-from-absolute a))
# (setq b (calendar-gregorian-from-absolute b))
# (insert
@@ -3501,84 +3523,84 @@ Rule Palestine 2021 only - Oct 29 1:00 0 -
Rule Palestine 2022 only - Mar 27 0:00 1:00 S
Rule Palestine 2022 2035 - Oct Sat<=30 2:00 0 -
Rule Palestine 2023 only - Apr 29 2:00 1:00 S
-Rule Palestine 2024 only - Apr 13 2:00 1:00 S
-Rule Palestine 2025 only - Apr 5 2:00 1:00 S
+Rule Palestine 2024 only - Apr 20 2:00 1:00 S
+Rule Palestine 2025 only - Apr 12 2:00 1:00 S
Rule Palestine 2026 2054 - Mar Sat<=30 2:00 1:00 S
Rule Palestine 2036 only - Oct 18 2:00 0 -
Rule Palestine 2037 only - Oct 10 2:00 0 -
Rule Palestine 2038 only - Sep 25 2:00 0 -
Rule Palestine 2039 only - Sep 17 2:00 0 -
-Rule Palestine 2039 only - Oct 22 2:00 1:00 S
-Rule Palestine 2039 2067 - Oct Sat<=30 2:00 0 -
Rule Palestine 2040 only - Sep 1 2:00 0 -
-Rule Palestine 2040 only - Oct 13 2:00 1:00 S
+Rule Palestine 2040 only - Oct 20 2:00 1:00 S
+Rule Palestine 2040 2067 - Oct Sat<=30 2:00 0 -
Rule Palestine 2041 only - Aug 24 2:00 0 -
-Rule Palestine 2041 only - Sep 28 2:00 1:00 S
+Rule Palestine 2041 only - Oct 5 2:00 1:00 S
Rule Palestine 2042 only - Aug 16 2:00 0 -
-Rule Palestine 2042 only - Sep 20 2:00 1:00 S
+Rule Palestine 2042 only - Sep 27 2:00 1:00 S
Rule Palestine 2043 only - Aug 1 2:00 0 -
-Rule Palestine 2043 only - Sep 12 2:00 1:00 S
+Rule Palestine 2043 only - Sep 19 2:00 1:00 S
Rule Palestine 2044 only - Jul 23 2:00 0 -
-Rule Palestine 2044 only - Aug 27 2:00 1:00 S
+Rule Palestine 2044 only - Sep 3 2:00 1:00 S
Rule Palestine 2045 only - Jul 15 2:00 0 -
-Rule Palestine 2045 only - Aug 19 2:00 1:00 S
+Rule Palestine 2045 only - Aug 26 2:00 1:00 S
Rule Palestine 2046 only - Jun 30 2:00 0 -
-Rule Palestine 2046 only - Aug 11 2:00 1:00 S
+Rule Palestine 2046 only - Aug 18 2:00 1:00 S
Rule Palestine 2047 only - Jun 22 2:00 0 -
-Rule Palestine 2047 only - Jul 27 2:00 1:00 S
+Rule Palestine 2047 only - Aug 3 2:00 1:00 S
Rule Palestine 2048 only - Jun 6 2:00 0 -
-Rule Palestine 2048 only - Jul 18 2:00 1:00 S
+Rule Palestine 2048 only - Jul 25 2:00 1:00 S
Rule Palestine 2049 only - May 29 2:00 0 -
-Rule Palestine 2049 only - Jul 3 2:00 1:00 S
+Rule Palestine 2049 only - Jul 10 2:00 1:00 S
Rule Palestine 2050 only - May 21 2:00 0 -
-Rule Palestine 2050 only - Jun 25 2:00 1:00 S
+Rule Palestine 2050 only - Jul 2 2:00 1:00 S
Rule Palestine 2051 only - May 6 2:00 0 -
-Rule Palestine 2051 only - Jun 17 2:00 1:00 S
+Rule Palestine 2051 only - Jun 24 2:00 1:00 S
Rule Palestine 2052 only - Apr 27 2:00 0 -
-Rule Palestine 2052 only - Jun 1 2:00 1:00 S
+Rule Palestine 2052 only - Jun 8 2:00 1:00 S
Rule Palestine 2053 only - Apr 12 2:00 0 -
-Rule Palestine 2053 only - May 24 2:00 1:00 S
+Rule Palestine 2053 only - May 31 2:00 1:00 S
Rule Palestine 2054 only - Apr 4 2:00 0 -
-Rule Palestine 2054 only - May 16 2:00 1:00 S
-Rule Palestine 2055 only - May 1 2:00 1:00 S
-Rule Palestine 2056 only - Apr 22 2:00 1:00 S
-Rule Palestine 2057 only - Apr 7 2:00 1:00 S
-Rule Palestine 2058 max - Mar Sat<=30 2:00 1:00 S
+Rule Palestine 2054 only - May 23 2:00 1:00 S
+Rule Palestine 2055 only - May 8 2:00 1:00 S
+Rule Palestine 2056 only - Apr 29 2:00 1:00 S
+Rule Palestine 2057 only - Apr 14 2:00 1:00 S
+Rule Palestine 2058 only - Apr 6 2:00 1:00 S
+Rule Palestine 2059 max - Mar Sat<=30 2:00 1:00 S
Rule Palestine 2068 only - Oct 20 2:00 0 -
Rule Palestine 2069 only - Oct 12 2:00 0 -
Rule Palestine 2070 only - Oct 4 2:00 0 -
Rule Palestine 2071 only - Sep 19 2:00 0 -
Rule Palestine 2072 only - Sep 10 2:00 0 -
-Rule Palestine 2072 only - Oct 15 2:00 1:00 S
+Rule Palestine 2072 only - Oct 22 2:00 1:00 S
Rule Palestine 2072 max - Oct Sat<=30 2:00 0 -
Rule Palestine 2073 only - Sep 2 2:00 0 -
-Rule Palestine 2073 only - Oct 7 2:00 1:00 S
+Rule Palestine 2073 only - Oct 14 2:00 1:00 S
Rule Palestine 2074 only - Aug 18 2:00 0 -
-Rule Palestine 2074 only - Sep 29 2:00 1:00 S
+Rule Palestine 2074 only - Oct 6 2:00 1:00 S
Rule Palestine 2075 only - Aug 10 2:00 0 -
-Rule Palestine 2075 only - Sep 14 2:00 1:00 S
+Rule Palestine 2075 only - Sep 21 2:00 1:00 S
Rule Palestine 2076 only - Jul 25 2:00 0 -
-Rule Palestine 2076 only - Sep 5 2:00 1:00 S
+Rule Palestine 2076 only - Sep 12 2:00 1:00 S
Rule Palestine 2077 only - Jul 17 2:00 0 -
-Rule Palestine 2077 only - Aug 28 2:00 1:00 S
+Rule Palestine 2077 only - Sep 4 2:00 1:00 S
Rule Palestine 2078 only - Jul 9 2:00 0 -
-Rule Palestine 2078 only - Aug 13 2:00 1:00 S
+Rule Palestine 2078 only - Aug 20 2:00 1:00 S
Rule Palestine 2079 only - Jun 24 2:00 0 -
-Rule Palestine 2079 only - Aug 5 2:00 1:00 S
+Rule Palestine 2079 only - Aug 12 2:00 1:00 S
Rule Palestine 2080 only - Jun 15 2:00 0 -
-Rule Palestine 2080 only - Jul 20 2:00 1:00 S
+Rule Palestine 2080 only - Jul 27 2:00 1:00 S
Rule Palestine 2081 only - Jun 7 2:00 0 -
-Rule Palestine 2081 only - Jul 12 2:00 1:00 S
+Rule Palestine 2081 only - Jul 19 2:00 1:00 S
Rule Palestine 2082 only - May 23 2:00 0 -
-Rule Palestine 2082 only - Jul 4 2:00 1:00 S
+Rule Palestine 2082 only - Jul 11 2:00 1:00 S
Rule Palestine 2083 only - May 15 2:00 0 -
-Rule Palestine 2083 only - Jun 19 2:00 1:00 S
+Rule Palestine 2083 only - Jun 26 2:00 1:00 S
Rule Palestine 2084 only - Apr 29 2:00 0 -
-Rule Palestine 2084 only - Jun 10 2:00 1:00 S
+Rule Palestine 2084 only - Jun 17 2:00 1:00 S
Rule Palestine 2085 only - Apr 21 2:00 0 -
-Rule Palestine 2085 only - Jun 2 2:00 1:00 S
+Rule Palestine 2085 only - Jun 9 2:00 1:00 S
Rule Palestine 2086 only - Apr 13 2:00 0 -
-Rule Palestine 2086 only - May 18 2:00 1:00 S
+Rule Palestine 2086 only - May 25 2:00 1:00 S
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Asia/Gaza 2:17:52 - LMT 1900 Oct
@@ -3606,7 +3628,7 @@ Zone Asia/Hebron 2:20:23 - LMT 1900 Oct
# Philippines
-# From Paul Eggert (2018-11-18):
+# From Paul Eggert (2024-01-21):
# 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.
@@ -3614,7 +3636,7 @@ Zone Asia/Hebron 2:20:23 - LMT 1900 Oct
# Philippines, issued a proclamation announcing that 1844-12-30 was to
# be immediately followed by 1845-01-01; see R.H. van Gent's
# History of the International Date Line
-# https://www.staff.science.uu.nl/~gent0113/idl/idl_philippines.htm
+# https://webspace.science.uu.nl/~gent0113/idl/idl_philippines.htm
# The rest of the data entries are from Shanks & Pottenger.
# From Jesper Nørgaard Welen (2006-04-26):
@@ -4041,7 +4063,8 @@ Zone Asia/Tashkent 4:37:11 - LMT 1924 May 2
# The English-language name of Vietnam's most populous city is "Ho Chi Minh
# City"; use Ho_Chi_Minh below to avoid a name of more than 14 characters.
-# From Paul Eggert (2022-07-27) after a 2014 heads-up from Trần Ngọc Quân:
+# From Paul Eggert (2024-01-14) after a 2014 heads-up from Trần Ngọc Quân
+# and a 2024-01-14 heads-up from Đoàn Trần Công Danh:
# Trần Tiến Bình's authoritative book "Lịch Việt Nam: thế kỷ XX-XXI (1901-2100)"
# (Nhà xuất bản Văn Hoá - Thông Tin, Hanoi, 2005), pp 49-50,
# is quoted verbatim in:
@@ -4071,14 +4094,35 @@ Zone Asia/Tashkent 4:37:11 - LMT 1924 May 2
#
# Trần cites the following sources; it's unclear which supplied the info above.
#
-# Hoàng Xuân Hãn: "Lịch và lịch Việt Nam". Tập san Khoa học Xã hội,
-# No. 9, Paris, February 1982.
+# Hoàng Xuân Hãn: "Lịch và lịch Việt Nam". Tập san Khoa học Xã hội,
+# No. 9, Paris, February 1982.
+#
+# Lê Thành Lân: "Lịch và niên biểu lịch sử hai mươi thế kỷ (0001-2010)",
+# NXB Thống kê, Hanoi, 2000.
#
-# Lê Thành Lân: "Lịch và niên biểu lịch sử hai mươi thế kỷ (0001-2010)",
-# NXB Thống kê, Hanoi, 2000.
+# Lê Thành Lân: "Lịch hai thế kỷ (1802-2010) và các lịch vĩnh cửu",
+# NXB Thuận Hoá, Huế, 1995.
#
-# Lê Thành Lân: "Lịch hai thế kỷ (1802-2010) và các lịch vĩnh cửu",
-# NXB Thuận Hoá, Huế, 1995.
+# Here is the decision for the September 1945 transition:
+# Võ Nguyên Giáp, Việt Nam Dân Quốc Công Báo, No. 1 (1945-09-29), page 13
+# http://baochi.nlv.gov.vn/baochi/cgi-bin/baochi?a=d&d=JwvzO19450929.2.5&dliv=none
+# It says that on 1945-09-01 at 24:00, Vietnam moved back two hours, to +07.
+# It also mentions a 1945-03-29 decree (by a Japanese Goveror-General)
+# to set the time zone to +09, but does not say whether that decree
+# merely legalized an earlier change to +09.
+#
+# July 1955 transition:
+# Ngô Đình Diệm, Công Báo Việt Nam, No. 92 (1955-07-02), page 1780-1781
+# Ordinance (Dụ) No. 46 (1955-06-25)
+# http://ddsnext.crl.edu/titles/32341#?c=0&m=29&s=0&cv=4&r=0&xywh=-89%2C342%2C1724%2C1216
+# It says that on 1955-07-01 at 01:00, South Vietnam moved back 1 hour (to +07).
+#
+# December 1959 transition:
+# Ngô Đình Diệm, Công Báo Việt Nam Cộng Hòa, 1960 part 1 (1960-01-02), page 62
+# Decree (Sắc lệnh) No. 362-TTP (1959-12-30)
+# http://ddsnext.crl.edu/titles/32341#?c=0&m=138&s=0&cv=793&r=0&xywh=-54%2C1504%2C1705%2C1202
+# It says that on 1959-12-31 at 23:00, South Vietnam moved forward 1 hour (to +08).
+
# Zone NAME STDOFF RULES FORMAT [UNTIL]
#STDOFF 7:06:30.13
@@ -4086,9 +4130,9 @@ Zone Asia/Ho_Chi_Minh 7:06:30 - LMT 1906 Jul 1
7:06:30 - PLMT 1911 May 1 # Phù Liễn MT
7:00 - +07 1942 Dec 31 23:00
8:00 - +08 1945 Mar 14 23:00
- 9:00 - +09 1945 Sep 2
+ 9:00 - +09 1945 Sep 1 24:00
7:00 - +07 1947 Apr 1
- 8:00 - +08 1955 Jul 1
+ 8:00 - +08 1955 Jul 1 01:00
7:00 - +07 1959 Dec 31 23:00
8:00 - +08 1975 Jun 13
7:00 - +07
diff --git a/contrib/tzdata/australasia b/contrib/tzdata/australasia
index dc98c1e2de17..0e9c2592e4be 100644
--- a/contrib/tzdata/australasia
+++ b/contrib/tzdata/australasia
@@ -420,11 +420,11 @@ Zone Pacific/Fiji 11:55:44 - LMT 1915 Oct 26 # Suva
# French Polynesia
# Zone NAME STDOFF RULES FORMAT [UNTIL]
-Zone Pacific/Gambier -8:59:48 - LMT 1912 Oct # Rikitea
+Zone Pacific/Gambier -8:59:48 - LMT 1912 Oct 1 # Rikitea
-9:00 - -09
-Zone Pacific/Marquesas -9:18:00 - LMT 1912 Oct
+Zone Pacific/Marquesas -9:18:00 - LMT 1912 Oct 1
-9:30 - -0930
-Zone Pacific/Tahiti -9:58:16 - LMT 1912 Oct # Papeete
+Zone Pacific/Tahiti -9:58:16 - LMT 1912 Oct 1 # Papeete
-10:00 - -10
# Clipperton (near North America) is administered from French Polynesia;
# it is uninhabited.
@@ -802,7 +802,7 @@ Zone Pacific/Apia 12:33:04 - LMT 1892 Jul 5
# Solomon Is
# excludes Bougainville, for which see Papua New Guinea
# Zone NAME STDOFF RULES FORMAT [UNTIL]
-Zone Pacific/Guadalcanal 10:39:48 - LMT 1912 Oct # Honiara
+Zone Pacific/Guadalcanal 10:39:48 - LMT 1912 Oct 1 # Honiara
11:00 - +11
# Tokelau
@@ -963,6 +963,10 @@ Zone Pacific/Efate 11:13:16 - LMT 1912 Jan 13 # Vila
# Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94.
# https://www.jstor.org/stable/1774359
#
+# For the 1911/1912 establishment of standard time in French possessions, see:
+# Société Française de Physique, Recueil de constantes physiques (1913),
+# page 752, 18b.
+#
# A reliable and entertaining source about time zones is
# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997).
#
@@ -2039,7 +2043,7 @@ Zone Pacific/Efate 11:13:16 - LMT 1912 Jan 13 # Vila
# ordaining - by a masterpiece of diplomatic flattery - that
# the Fourth of July should be celebrated twice in that year."
# This happened in 1892, according to the Evening News (Sydney) of 1892-07-20.
-# https://www.staff.science.uu.nl/~gent0113/idl/idl.htm
+# https://webspace.science.uu.nl/~gent0113/idl/idl_alaska_samoa.htm
# Although Shanks & Pottenger says they both switched to UT -11:30
# in 1911, and to -11 in 1950. many earlier sources give -11
diff --git a/contrib/tzdata/checknow.awk b/contrib/tzdata/checknow.awk
index d722c03fd689..57ff3c02e789 100644
--- a/contrib/tzdata/checknow.awk
+++ b/contrib/tzdata/checknow.awk
@@ -45,7 +45,7 @@ END {
for (zone in zone_data) {
data = zone_data[zone]
if (!zonenow[data]) {
- printf "checknow.tab should have one of:%s\n", zones[data]
+ printf "zonenow.tab should have one of:%s\n", zones[data]
zonenow[data] = zone # This suppresses duplicate diagnostics.
status = 1
}
diff --git a/contrib/tzdata/etcetera b/contrib/tzdata/etcetera
index 865a220c1f4b..29fbed9b9290 100644
--- a/contrib/tzdata/etcetera
+++ b/contrib/tzdata/etcetera
@@ -5,7 +5,7 @@
# These entries are for uses not otherwise covered by the tz database.
# Their main practical use is for platforms like Android that lack
-# support for POSIX-style TZ strings. On such platforms these entries
+# support for POSIX.1-2017-style TZ strings. On such platforms these entries
# can be useful if the timezone database is wrong or if a ship or
# aircraft at sea is not in a timezone.
diff --git a/contrib/tzdata/europe b/contrib/tzdata/europe
index 27f821e77600..c6b5270316b9 100644
--- a/contrib/tzdata/europe
+++ b/contrib/tzdata/europe
@@ -990,9 +990,34 @@ Zone Europe/Sofia 1:33:16 - LMT 1880
# Czech Republic (Czechia)
# Slovakia
#
-# From Paul Eggert (2018-04-15):
-# The source for Czech data is: Kdy začíná a končí letní čas. 2018-04-15.
+# From Ivan Benovic (2024-01-30):
+# https://www.slov-lex.sk/pravne-predpisy/SK/ZZ/1946/54/
+# (This is an official link to the Czechoslovak Summer Time Act of
+# March 8, 1946 that authorizes the Czechoslovak government to set the
+# exact dates of change to summer time and back to Central European Time.
+# The act also implicitly confirms Central European Time as the
+# official time zone of Czechoslovakia and currently remains in force
+# in both the Czech Republic and Slovakia.)
+# https://www.psp.cz/eknih/1945pns/tisky/t0216_00.htm
+# (This is a link to the original legislative proposal dating back to
+# February 22, 1946. The accompanying memorandum to the proposal says
+# that an advisory committee on European railroad transportation that
+# met in Brussels in October 1945 decided that the change of time
+# should be carried out in all participating countries in a strictly
+# coordinated manner....)
+#
+# From Paul Eggert (2024-01-30):
+# The source for Czech data is: Kdy začíná a končí letní čas.
# https://kalendar.beda.cz/kdy-zacina-a-konci-letni-cas
+# Its main text disagrees with its quoted sources only in 1918,
+# where the main text says spring and autumn transitions
+# occurred at 02:00 and 03:00 respectively (as usual),
+# whereas the 1918 source "Oznámení o zavedení letního času v roce 1918"
+# says transitions were at 01:00 and 02:00 respectively.
+# As the 1918 source appears to be a humorous piece, and it is
+# unlikely that Prague would have disagreed with its neighbors by an hour,
+# go with the main text for now.
+#
# We know of no English-language name for historical Czech winter time;
# abbreviate it as "GMT", as it happened to be GMT.
#
diff --git a/contrib/tzdata/leap-seconds.list b/contrib/tzdata/leap-seconds.list
index 3fe9a1210e3c..e52effc257b2 100644
--- a/contrib/tzdata/leap-seconds.list
+++ b/contrib/tzdata/leap-seconds.list
@@ -1,255 +1,120 @@
+# ATOMIC TIME.
+# The Coordinated Universal Time (UTC) is the reference time scale derived
+# from The "Temps Atomique International" (TAI) calculated by the Bureau
+# International des Poids et Mesures (BIPM) using a worldwide network of atomic
+# clocks. UTC differs from TAI by an integer number of seconds; it is the basis
+# of all activities in the world.
#
-# In the following text, the symbol '#' introduces
-# a comment, which continues from that symbol until
-# the end of the line. A plain comment line has a
-# whitespace character following the comment indicator.
-# There are also special comment lines defined below.
-# A special comment will always have a non-whitespace
-# character in column 2.
-#
-# A blank line should be ignored.
-#
-# The following table shows the corrections that must
-# be applied to compute International Atomic Time (TAI)
-# from the Coordinated Universal Time (UTC) values that
-# are transmitted by almost all time services.
-#
-# The first column shows an epoch as a number of seconds
-# since 1 January 1900, 00:00:00 (1900.0 is also used to
-# indicate the same epoch.) Both of these time stamp formats
-# ignore the complexities of the time scales that were
-# used before the current definition of UTC at the start
-# of 1972. (See note 3 below.)
-# The second column shows the number of seconds that
-# must be added to UTC to compute TAI for any timestamp
-# at or after that epoch. The value on each line is
-# valid from the indicated initial instant until the
-# epoch given on the next one or indefinitely into the
-# future if there is no next line.
-# (The comment on each line shows the representation of
-# the corresponding initial epoch in the usual
-# day-month-year format. The epoch always begins at
-# 00:00:00 UTC on the indicated day. See Note 5 below.)
-#
-# Important notes:
-#
-# 1. Coordinated Universal Time (UTC) is often referred to
-# as Greenwich Mean Time (GMT). The GMT time scale is no
-# longer used, and the use of GMT to designate UTC is
-# discouraged.
-#
-# 2. The UTC time scale is realized by many national
-# laboratories and timing centers. Each laboratory
-# identifies its realization with its name: Thus
-# UTC(NIST), UTC(USNO), etc. The differences among
-# these different realizations are typically on the
-# order of a few nanoseconds (i.e., 0.000 000 00x s)
-# and can be ignored for many purposes. These differences
-# are tabulated in Circular T, which is published monthly
-# by the International Bureau of Weights and Measures
-# (BIPM). See www.bipm.org for more information.
-#
-# 3. The current definition of the relationship between UTC
-# and TAI dates from 1 January 1972. A number of different
-# time scales were in use before that epoch, and it can be
-# quite difficult to compute precise timestamps and time
-# intervals in those "prehistoric" days. For more information,
-# consult:
-#
-# The Explanatory Supplement to the Astronomical
-# Ephemeris.
-# or
-# Terry Quinn, "The BIPM and the Accurate Measurement
-# of Time," Proc. of the IEEE, Vol. 79, pp. 894-905,
-# July, 1991. <http://dx.doi.org/10.1109/5.84965>
-# reprinted in:
-# Christine Hackman and Donald B Sullivan (eds.)
-# Time and Frequency Measurement
-# American Association of Physics Teachers (1996)
-# <http://tf.nist.gov/general/pdf/1168.pdf>, pp. 75-86
-#
-# 4. The decision to insert a leap second into UTC is currently
-# the responsibility of the International Earth Rotation and
-# Reference Systems Service. (The name was changed from the
-# International Earth Rotation Service, but the acronym IERS
-# is still used.)
-#
-# Leap seconds are announced by the IERS in its Bulletin C.
-#
-# See www.iers.org for more details.
-#
-# Every national laboratory and timing center uses the
-# data from the BIPM and the IERS to construct UTC(lab),
-# their local realization of UTC.
-#
-# Although the definition also includes the possibility
-# of dropping seconds ("negative" leap seconds), this has
-# never been done and is unlikely to be necessary in the
-# foreseeable future.
-#
-# 5. If your system keeps time as the number of seconds since
-# some epoch (e.g., NTP timestamps), then the algorithm for
-# assigning a UTC time stamp to an event that happens during a positive
-# leap second is not well defined. The official name of that leap
-# second is 23:59:60, but there is no way of representing that time
-# in these systems.
-# Many systems of this type effectively stop the system clock for
-# one second during the leap second and use a time that is equivalent
-# to 23:59:59 UTC twice. For these systems, the corresponding TAI
-# timestamp would be obtained by advancing to the next entry in the
-# following table when the time equivalent to 23:59:59 UTC
-# is used for the second time. Thus the leap second which
-# occurred on 30 June 1972 at 23:59:59 UTC would have TAI
-# timestamps computed as follows:
-#
-# ...
-# 30 June 1972 23:59:59 (2287785599, first time): TAI= UTC + 10 seconds
-# 30 June 1972 23:59:60 (2287785599,second time): TAI= UTC + 11 seconds
-# 1 July 1972 00:00:00 (2287785600) TAI= UTC + 11 seconds
-# ...
-#
-# If your system realizes the leap second by repeating 00:00:00 UTC twice
-# (this is possible but not usual), then the advance to the next entry
-# in the table must occur the second time that a time equivalent to
-# 00:00:00 UTC is used. Thus, using the same example as above:
-#
-# ...
-# 30 June 1972 23:59:59 (2287785599): TAI= UTC + 10 seconds
-# 30 June 1972 23:59:60 (2287785600, first time): TAI= UTC + 10 seconds
-# 1 July 1972 00:00:00 (2287785600,second time): TAI= UTC + 11 seconds
-# ...
-#
-# in both cases the use of timestamps based on TAI produces a smooth
-# time scale with no discontinuity in the time interval. However,
-# although the long-term behavior of the time scale is correct in both
-# methods, the second method is technically not correct because it adds
-# the extra second to the wrong day.
-#
-# This complexity would not be needed for negative leap seconds (if they
-# are ever used). The UTC time would skip 23:59:59 and advance from
-# 23:59:58 to 00:00:00 in that case. The TAI offset would decrease by
-# 1 second at the same instant. This is a much easier situation to deal
-# with, since the difficulty of unambiguously representing the epoch
-# during the leap second does not arise.
-#
-# Some systems implement leap seconds by amortizing the leap second
-# over the last few minutes of the day. The frequency of the local
-# clock is decreased (or increased) to realize the positive (or
-# negative) leap second. This method removes the time step described
-# above. Although the long-term behavior of the time scale is correct
-# in this case, this method introduces an error during the adjustment
-# period both in time and in frequency with respect to the official
-# definition of UTC.
-#
-# Questions or comments to:
-# Judah Levine
-# Time and Frequency Division
-# NIST
-# Boulder, Colorado
-# Judah.Levine@nist.gov
-#
-# Last Update of leap second values: 8 July 2016
-#
-# The following line shows this last update date in NTP timestamp
-# format. This is the date on which the most recent change to
-# the leap second data was added to the file. This line can
-# be identified by the unique pair of characters in the first two
-# columns as shown below.
-#
-#$ 3676924800
-#
-# The NTP timestamps are in units of seconds since the NTP epoch,
-# which is 1 January 1900, 00:00:00. The Modified Julian Day number
-# corresponding to the NTP time stamp, X, can be computed as
-#
-# X/86400 + 15020
-#
-# where the first term converts seconds to days and the second
-# term adds the MJD corresponding to the time origin defined above.
-# The integer portion of the result is the integer MJD for that
-# day, and any remainder is the time of day, expressed as the
-# fraction of the day since 0 hours UTC. The conversion from day
-# fraction to seconds or to hours, minutes, and seconds may involve
-# rounding or truncation, depending on the method used in the
-# computation.
-#
-# The data in this file will be updated periodically as new leap
-# seconds are announced. In addition to being entered on the line
-# above, the update time (in NTP format) will be added to the basic
-# file name leap-seconds to form the name leap-seconds.<NTP TIME>.
-# In addition, the generic name leap-seconds.list will always point to
-# the most recent version of the file.
-#
-# This update procedure will be performed only when a new leap second
-# is announced.
-#
-# The following entry specifies the expiration date of the data
-# in this file in units of seconds since the origin at the instant
-# 1 January 1900, 00:00:00. This expiration date will be changed
-# at least twice per year whether or not a new leap second is
-# announced. These semi-annual changes will be made no later
-# than 1 June and 1 December of each year to indicate what
-# action (if any) is to be taken on 30 June and 31 December,
-# respectively. (These are the customary effective dates for new
-# leap seconds.) This expiration date will be identified by a
-# unique pair of characters in columns 1 and 2 as shown below.
-# In the unlikely event that a leap second is announced with an
-# effective date other than 30 June or 31 December, then this
-# file will be edited to include that leap second as soon as it is
-# announced or at least one month before the effective date
-# (whichever is later).
-# If an announcement by the IERS specifies that no leap second is
-# scheduled, then only the expiration date of the file will
-# be advanced to show that the information in the file is still
-# current -- the update time stamp, the data and the name of the file
-# will not change.
-#
-# Updated through IERS Bulletin C66
-# File expires on: 28 June 2024
-#
-#@ 3928521600
-#
-2272060800 10 # 1 Jan 1972
-2287785600 11 # 1 Jul 1972
-2303683200 12 # 1 Jan 1973
-2335219200 13 # 1 Jan 1974
-2366755200 14 # 1 Jan 1975
-2398291200 15 # 1 Jan 1976
-2429913600 16 # 1 Jan 1977
-2461449600 17 # 1 Jan 1978
-2492985600 18 # 1 Jan 1979
-2524521600 19 # 1 Jan 1980
-2571782400 20 # 1 Jul 1981
-2603318400 21 # 1 Jul 1982
-2634854400 22 # 1 Jul 1983
-2698012800 23 # 1 Jul 1985
-2776982400 24 # 1 Jan 1988
-2840140800 25 # 1 Jan 1990
-2871676800 26 # 1 Jan 1991
-2918937600 27 # 1 Jul 1992
-2950473600 28 # 1 Jul 1993
-2982009600 29 # 1 Jul 1994
-3029443200 30 # 1 Jan 1996
-3076704000 31 # 1 Jul 1997
-3124137600 32 # 1 Jan 1999
-3345062400 33 # 1 Jan 2006
-3439756800 34 # 1 Jan 2009
-3550089600 35 # 1 Jul 2012
-3644697600 36 # 1 Jul 2015
-3692217600 37 # 1 Jan 2017
-#
-# the following special comment contains the
-# hash value of the data in this file computed
-# use the secure hash algorithm as specified
-# by FIPS 180-1. See the files in ~/pub/sha for
-# the details of how this hash value is
-# computed. Note that the hash computation
-# ignores comments and whitespace characters
-# in data lines. It includes the NTP values
*** 599 LINES SKIPPED ***