diff options
| -rw-r--r-- | Makefile | 55 | ||||
| -rw-r--r-- | NEWS | 89 | ||||
| -rw-r--r-- | africa | 4 | ||||
| -rw-r--r-- | asia | 2 | ||||
| -rw-r--r-- | backward | 1 | ||||
| -rw-r--r-- | backzone | 55 | ||||
| -rw-r--r-- | europe | 28 | ||||
| -rw-r--r-- | iso3166.tab | 6 | ||||
| -rw-r--r-- | northamerica | 161 | ||||
| -rw-r--r-- | southamerica | 9 | ||||
| -rw-r--r-- | theory.html | 1 | ||||
| -rw-r--r-- | version | 2 | ||||
| -rw-r--r-- | zone.tab | 26 | ||||
| -rw-r--r-- | zone1970.tab | 26 |
14 files changed, 337 insertions, 128 deletions
@@ -196,6 +196,7 @@ PACKRATLIST= UTF8_LOCALE= en_US.utf8 # Non-default libraries needed to link. +# On some hosts, this should have -lintl unless CFLAGS has -DHAVE_GETTEXT=0. LDLIBS= # Add the following to the end of the "CFLAGS=" line as needed to override @@ -208,14 +209,18 @@ LDLIBS= # For example, N is 252460800 on AmigaOS. # -DHAVE_DECL_ASCTIME_R=0 if <time.h> does not declare asctime_r # -DHAVE_DECL_ENVIRON if <unistd.h> declares 'environ' +# -DHAVE_DECL_TIMEGM=0 if <time.h> does not declare timegm # -DHAVE_DIRECT_H if mkdir needs <direct.h> (MS-Windows) -# -DHAVE_GENERIC=0 if _Generic does not work -# -DHAVE_GETRANDOM if getgrandom works (e.g., GNU/Linux)* -# -DHAVE_GETTEXT if 'gettext' works (e.g., GNU/Linux, FreeBSD, Solaris)* +# -DHAVE_GENERIC=0 if _Generic does not work* +# -DHAVE_GETRANDOM if getrandom works (e.g., GNU/Linux), +# -DHAVE_GETRANDOM=0 to avoid using getrandom +# -DHAVE_GETTEXT if gettext works (e.g., GNU/Linux, FreeBSD, Solaris), +# where LDLIBS also needs to contain -lintl on some hosts; +# -DHAVE_GETTEXT=0 to avoid using gettext # -DHAVE_INCOMPATIBLE_CTIME_R if your system's time.h declares # ctime_r and asctime_r incompatibly with the POSIX standard # (Solaris when _POSIX_PTHREAD_SEMANTICS is not defined). -# -DHAVE_INTTYPES_H if you have a non-C99 compiler with <inttypes.h> +# -DHAVE_INTTYPES_H=0 if <inttypes.h> does not work* # -DHAVE_LINK=0 if your system lacks a link function # -DHAVE_LOCALTIME_R=0 if your system lacks a localtime_r function # -DHAVE_LOCALTIME_RZ=0 if you do not want zdump to use localtime_rz @@ -225,15 +230,17 @@ LDLIBS= # functions like 'link' or variables like 'tzname' required by POSIX # -DHAVE_SETENV=0 if your system lacks the setenv function # -DHAVE_SNPRINTF=0 if your system lacks the snprintf function -# -DHAVE_STDINT_H if you have a non-C99 compiler with <stdint.h>* +# -DHAVE_STDCKDINT_H=0 if neither <stdckdint.h> nor substitutes like +# __builtin_add_overflow work* +# -DHAVE_STDINT_H=0 if <stdint.h> does not work* # -DHAVE_STRFTIME_L if <time.h> declares locale_t and strftime_l # -DHAVE_STRDUP=0 if your system lacks the strdup function # -DHAVE_STRTOLL=0 if your system lacks the strtoll function # -DHAVE_SYMLINK=0 if your system lacks the symlink function -# -DHAVE_SYS_STAT_H=0 if your compiler lacks a <sys/stat.h>* +# -DHAVE_SYS_STAT_H=0 if <sys/stat.h> does not work* # -DHAVE_TZSET=0 if your system lacks a tzset function -# -DHAVE_UNISTD_H=0 if your compiler lacks a <unistd.h>* -# -DHAVE_UTMPX_H=0 if your compiler lacks a <utmpx.h>* +# -DHAVE_UNISTD_H=0 if <unistd.h> does not work* +# -DHAVE_UTMPX_H=0 if <utmpx.h> does not work* # -Dlocale_t=XXX if your system uses XXX instead of locale_t # -DRESERVE_STD_EXT_IDS if your platform reserves standard identifiers # with external linkage, e.g., applications cannot define 'localtime'. @@ -280,7 +287,7 @@ GCC_DEBUG_FLAGS = -DGCC_LINT -g3 -O3 -fno-common \ -Wdeclaration-after-statement -Wdouble-promotion \ -Wduplicated-branches -Wduplicated-cond \ -Wformat=2 -Wformat-overflow=2 -Wformat-signedness -Wformat-truncation \ - -Winit-self -Wlogical-op \ + -Wimplicit-fallthrough=5 -Winit-self -Wlogical-op \ -Wmissing-declarations -Wmissing-prototypes -Wnested-externs \ -Wnull-dereference \ -Wold-style-definition -Woverlength-strings -Wpointer-arith \ @@ -293,7 +300,7 @@ GCC_DEBUG_FLAGS = -DGCC_LINT -g3 -O3 -fno-common \ -Wtrampolines -Wundef -Wuninitialized -Wunused-macros -Wuse-after-free=3 \ -Wvariadic-macros -Wvla -Wwrite-strings \ -Wno-address -Wno-format-nonliteral -Wno-sign-compare \ - -Wno-type-limits -Wno-unused-parameter + -Wno-type-limits # # If your system has a "GMT offset" field in its "struct tm"s # (or if you decide to add such a field in your system's "time.h" file), @@ -340,14 +347,11 @@ GCC_DEBUG_FLAGS = -DGCC_LINT -g3 -O3 -fno-common \ # If you want functions that were inspired by early versions of X3J11's work, # add # -DSTD_INSPIRED -# to the end of the "CFLAGS=" line. This arranges for the functions -# "offtime", "timelocal", "timegm", "timeoff", -# "posix2time", and "time2posix" to be added to the time conversion library. +# to the end of the "CFLAGS=" line. This arranges for the following +# functions to be added to the time conversion library. # "offtime" is like "gmtime" except that it accepts a second (long) argument # that gives an offset to add to the time_t when converting it. # "timelocal" is equivalent to "mktime". -# "timegm" is like "timelocal" except that it turns a struct tm into -# a time_t using UT (rather than local time as "timelocal" does). # "timeoff" is like "timegm" except that it accepts a second (long) argument # that gives an offset to use when converting to a time_t. # "posix2time" and "time2posix" are described in an included manual page. @@ -495,6 +499,11 @@ TARFLAGS= `if tar $(GNUTARFLAGS) --version >/dev/null 2>&1; \ # Flags to give 'gzip' when making a distribution. GZIPFLAGS= -9n +# When comparing .tzs files, use GNU diff's -F'^TZ=' option if supported. +# This makes it easier to see which Zone has been affected. +DIFF_TZS= diff -u$$(! diff -u -F'^TZ=' - - <>/dev/null >&0 2>&1 \ + || echo ' -F^TZ=') + ############################################################################### #MAKE= make @@ -773,7 +782,8 @@ tzselect: tzselect.ksh version chmod +x $@.out mv $@.out $@ -check: check_character_set check_white_space check_links \ +check: check_back check_mild +check_mild: check_character_set check_white_space check_links \ check_name_lengths check_slashed_abbrs check_sorted \ check_tables check_web check_ziguard check_zishrink check_tzs @@ -824,16 +834,19 @@ check_slashed_abbrs: $(TDATA_TO_CHECK) CHECK_CC_LIST = { n = split($$1,a,/,/); for (i=2; i<=n; i++) print a[1], a[i]; } check_sorted: backward backzone iso3166.tab zone.tab zone1970.tab - $(AWK) '/^Link/ {printf "%.5d %s\n", g, $$3} /^$$/ {g++}' \ + $(AWK) '/^Link/ {printf "%.5d %s\n", g, $$3} !/./ {g++}' \ backward | LC_ALL=C sort -cu $(AWK) '/^Zone/ {print $$2}' backzone | LC_ALL=C sort -cu touch $@ -check_links: checklinks.awk $(TDATA_TO_CHECK) tzdata.zi +check_back: checklinks.awk $(TDATA_TO_CHECK) $(AWK) \ -v DATAFORM=$(DATAFORM) \ -v backcheck=backward \ -f checklinks.awk $(TDATA_TO_CHECK) + touch $@ + +check_links: checklinks.awk tzdata.zi $(AWK) \ -v DATAFORM=$(DATAFORM) \ -f checklinks.awk tzdata.zi @@ -849,7 +862,7 @@ check_tables: checktab.awk $(YDATA) backward $(ZONETABLES) check_tzs: $(TZS) $(TZS_NEW) if test -s $(TZS); then \ - diff -u $(TZS) $(TZS_NEW); \ + $(DIFF_TZS) $(TZS) $(TZS_NEW); \ else \ cp $(TZS_NEW) $(TZS); \ fi @@ -1050,7 +1063,7 @@ $(TIME_T_ALTERNATIVES): $(VERSION_DEPS) TZS_YEAR="$$range" TZS_CUTOFF_FLAG="-t $$range" \ D=$$wd/$@.dir \ to$$range.tzs) && \ - diff -u $(TIME_T_ALTERNATIVES_HEAD).dir/to$$range.tzs \ + $(DIFF_TZS) $(TIME_T_ALTERNATIVES_HEAD).dir/to$$range.tzs \ $@.dir/to$$range.tzs && \ if diff -q Makefile Makefile 2>/dev/null; then \ quiet_option='-q'; \ @@ -1220,7 +1233,7 @@ zdump.o: version.h zic.o: private.h tzfile.h version.h .PHONY: ALL INSTALL all -.PHONY: check check_time_t_alternatives +.PHONY: check check_mild check_time_t_alternatives .PHONY: check_web check_zishrink .PHONY: clean clean_misc dummy.zd force_tzs .PHONY: install install_data maintainer-clean names @@ -1,5 +1,91 @@ News for the tz database +Release 2022g - 2022-11-29 08:58:31 -0800 + + Briefly: + The northern edge of Chihuahua changes to US timekeeping. + Much of Greenland stops changing clocks after March 2023. + Fix some pre-1996 timestamps in northern Canada. + C89 is now deprecated; please use C99 or later. + Portability fixes for AIX, libintl, MS-Windows, musl, z/OS + In C code, use more C23 features if available. + C23 timegm now supported by default + Fixes for unlikely integer overflows + + Changes to future timestamps + + In the Mexican state of Chihuahua, the border strip near the US + will change to agree with nearby US locations on 2022-11-30. + The strip's western part, represented by Ciudad Juárez, switches + from -06 all year to -07/-06 with US DST rules, like El Paso, TX. + The eastern part, represented by Ojinaga, will observe US DST next + year, like Presidio, TX. (Thanks to Heitor David Pinto.) + A new Zone America/Ciudad_Juarez splits from America/Ojinaga. + + Much of Greenland, represented by America/Nuuk, stops observing + winter time after March 2023, so its daylight saving time becomes + standard time. (Thanks to Jonas Nyrup and Jürgen Appel.) + + Changes to past timestamps + + Changes for pre-1996 northern Canada (thanks to Chris Walton): + + Merge America/Iqaluit and America/Pangnirtung into the former, + with a backward compatibility link for the latter name. + There is no good evidence the two locations differ since 1970. + This change affects pre-1996 America/Pangnirtung timestamps. + + Cambridge Bay, Inuvik, Iqaluit, Rankin Inlet, Resolute and + Yellowknife did not observe DST in 1965, and did observe DST + from 1972 through 1979. + + Whitehorse moved from -09 to -08 on 1966-02-27, not 1967-05-28. + + Colombia's 1993 fallback was 02-06 24:00, not 04-04 00:00. + (Thanks to Alois Treindl.) + + Singapore's 1981-12-31 change was at 16:00 UTC (23:30 local time), + not 24:00 local time. (Thanks to Geoff Clare via Robert Elz.) + + Changes to code + + Although tzcode still works with C89, bugs found in recent routine + maintenance indicate that bitrot has set in and that in practice + C89 is no longer used to build tzcode. As it is a maintenance + burden, support for C89 is planned to be removed soon. Instead, + please use compilers compatible with C99, C11, C17, or C23. + + timegm, which tzcode implemented in 1989, will finally be + standardized 34 years later as part of C23, so timegm is now + supported even if STD_INSPIRED is not defined. + + Fix bug in zdump's tzalloc emulation on hosts that lack tm_zone. + (Problem reported by Đoàn Trần Công Danh.) + + Fix bug in zic on hosts where malloc(0) yields NULL on success. + (Problem reported by Tim McBrayer for AIX 6.1.) + + Fix zic configuration to avoid linkage failures on some platforms. + (Problems reported by Gilmore Davidson and Igor Ivanov.) + + Work around MS-Windows nmake incompatibility with POSIX. + (Problem reported by Manuela Friedrich.) + + Port mktime and strftime to debugging platforms where accessing + uninitialized data has undefined behavior (strftime problem + reported by Robert Elz). + + Check more carefully for unlikely integer overflows, preferring + C23 <stdckdint.h> to overflow checking by hand, as the latter has + had obscure bugs. + + Changes to build procedure + + New Makefile rule check_mild that skips checking whether Link + lines are in the file 'backward'. (Inspired by a suggestion from + Stephen Colebourne.) + + Release 2022f - 2022-10-28 18:04:57 -0700 Briefly: @@ -16,7 +102,7 @@ Release 2022f - 2022-10-28 18:04:57 -0700 In C code, use some C23 features if available. Remove no-longer-needed workaround for Qt bug 53071. - Changes to future timestamps. + Changes to future timestamps Mexico will no longer observe DST after 2022, except for areas near the US border that continue to observe US DST rules. @@ -24,6 +110,7 @@ Release 2022f - 2022-10-28 18:04:57 -0700 from -07 (-06 with DST) to year-round -06, thus not changing its clocks that day. The new law states that Chihuahua near the US border no longer observes US DST. + (Thanks to gera for the heads-up about Chihuahua.) Fiji will not observe DST in 2022/3. (Thanks to Shalvin Narayan.) For now, assume DST is suspended indefinitely. @@ -588,6 +588,10 @@ Zone Indian/Mauritius 3:50:00 - LMT 1907 # Port Louis # Agalega Is, Rodriguez # no information; probably like Indian/Mauritius + +# Morocco +# See Africa/Ceuta for Spanish Morocco. + # From Alex Krivenyshev (2008-05-09): # Here is an article that Morocco plan to introduce Daylight Saving Time between # 1 June, 2008 and 27 September, 2008. @@ -3585,7 +3585,7 @@ Zone Asia/Singapore 6:55:25 - LMT 1901 Jan 1 7:20 - +0720 1941 Sep 1 7:30 - +0730 1942 Feb 16 9:00 - +09 1945 Sep 12 - 7:30 - +0730 1982 Jan 1 + 7:30 - +0730 1981 Dec 31 16:00u 8:00 - +08 # Spratly Is @@ -267,6 +267,7 @@ Link America/Tijuana America/Ensenada Link America/Indiana/Indianapolis America/Fort_Wayne Link America/Toronto America/Montreal Link America/Toronto America/Nipigon +Link America/Iqaluit America/Pangnirtung Link America/Rio_Branco America/Porto_Acre Link America/Winnipeg America/Rainy_River Link America/Argentina/Cordoba America/Rosario @@ -7,6 +7,10 @@ # tz@iana.org for general use in the future). For more, please see # the file CONTRIBUTING in the tz distribution. +# When proposing changes to this file, please use 'git format-patch' +# format, either by attaching the resulting .patch file to your email, +# or by using 'git send-email'. This will help maintainers save time. + # From Paul Eggert (2014-10-31): @@ -750,6 +754,55 @@ Zone America/Nipigon -5:53:04 - LMT 1895 -5:00 1:00 EDT 1942 Feb 9 2:00s -5:00 Canada E%sT +# From Rives McDow (1999-11-08): +# On October 31, when the rest of Nunavut went to Central time, +# Pangnirtung wobbled. Here is the result of their wobble: +# +# The following businesses and organizations in Pangnirtung use Central Time: +# +# First Air, Power Corp, Nunavut Construction, Health Center, RCMP, +# Eastern Arctic National Parks, A & D Specialist +# +# The following businesses and organizations in Pangnirtung use Eastern Time: +# +# Hamlet office, All other businesses, Both schools, Airport operator +# +# This has made for an interesting situation there, which warranted the news. +# No one there that I spoke with seems concerned, or has plans to +# change the local methods of keeping time, as it evidently does not +# really interfere with any activities or make things difficult locally. +# They plan to celebrate New Year's turn-over twice, one hour apart, +# so it appears that the situation will last at least that long. +# The Nunavut Intergovernmental Affairs hopes that they will "come to +# their senses", but the locals evidently don't see any problem with +# the current state of affairs. + +# From Michaela Rodrigue, writing in the +# Nunatsiaq News (1999-11-19): +# http://www.nunatsiaqonline.ca/archives/nunavut991130/nvt91119_17.html +# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, +# central - or Nunavut time - for government offices, and eastern time +# for municipal offices and schools.... Igloolik [was similar but then] +# made the switch to central time on Saturday, Nov. 6. + +# From Chris Walton (2022-11-06): +# The implication is that Pangnirtung and Qikiqtarjuaq have observed Eastern +# Time as far back as 1984 (and likely even further back than that). +# It is possible that these communities never actually observed Atlantic +# Time, but that would be difficult to prove. +# From Paul Eggert (2022-11-06): +# This is in 'backzone' as we have no good evidence that Pangnirtung differs +# from America/Iqaluit since 1970. A Google Books snippet view of +# volume 2, page 186 of "Pilot of Arctic Canada", published 1959 by +# the Canadian Hydrographic Service, suggests (though does not state) +# that Pangnirtung observed EST then. +# +# aka Panniqtuuq +Zone America/Pangnirtung 0 - -00 1921 # trading post est. + -5:00 NT_YK E%sT 1999 Oct 31 2:00 + -6:00 Canada C%sT 2000 Oct 29 2:00 + -5:00 Canada E%sT + # United States # # From Paul Eggert (2018-03-18): @@ -1043,7 +1096,7 @@ Zone Asia/Kuala_Lumpur 6:46:46 - LMT 1901 Jan 1 7:20 - +0720 1941 Sep 1 7:30 - +0730 1942 Feb 16 9:00 - +09 1945 Sep 12 - 7:30 - +0730 1982 Jan 1 + 7:30 - +0730 1981 Dec 31 16:00u 8:00 - +08 # Kuwait @@ -1103,7 +1103,30 @@ Zone Atlantic/Faroe -0:27:04 - LMT 1908 Jan 11 # Tórshavn # "National Park" by Executive Order: # http://naalakkersuisut.gl/~/media/Nanoq/Files/Attached%20Files/Engelske-tekster/Legislation/Executive%20Order%20National%20Park.rtf # It is their only National Park. -# + +# From Jonas Nyrup (2022-11-24): +# On last Saturday in October 2023 when DST ends America/Nuuk will switch +# from -03/-02 to -02/-01 +# https://sermitsiaq.ag/forslagtidsforskel-danmark-mindskes-sommertid-beholdes +# ... +# https://sermitsiaq.ag/groenland-skifte-tidszone-trods-bekymringer +# +# From Jürgen Appel (2022-11-25): +# https://ina.gl/samlinger/oversigt-over-samlinger/samling/dagsordener/dagsorden.aspx?lang=da&day=24-11-2022 +# If I understand this correctly, from the next planned switch to +# summer time, Greenland will permanently stay at that time, i.e. no +# switch back to winter time in 2023 will occur. +# +# From Paul Eggert (2022-11-28): +# The official document in Danish +# https://naalakkersuisut.gl/-/media/naalakkersuisut/filer/kundgoerelser/2022/11/2511/31_da_inatsisartutlov-om-tidens-bestemmelse.pdf?la=da&hash=A33597D8A38CC7038465241119EF34F3 +# says standard time for Greenland is -02, that Naalakkersuisut can lay down +# rules for DST and can require some areas to use a different time zone, +# and that this all takes effect 2023-03-25 22:00. The abovementioned +# "bekymringer" URL says the intent is no transition March 25, that +# Greenland will not go back to winter time in fall 2023, and that +# only America/Nuuk is affected (though further changes may occur). + # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Thule 1991 1992 - Mar lastSun 2:00 1:00 D Rule Thule 1991 1992 - Sep lastSun 2:00 0 S @@ -1126,7 +1149,8 @@ Zone America/Scoresbysund -1:27:52 - LMT 1916 Jul 28 # Ittoqqortoormiit -1:00 EU -01/+00 Zone America/Nuuk -3:26:56 - LMT 1916 Jul 28 # Godthåb -3:00 - -03 1980 Apr 6 2:00 - -3:00 EU -03/-02 + -3:00 EU -03/-02 2023 Mar 25 22:00 + -2:00 - -02 Zone America/Thule -4:35:08 - LMT 1916 Jul 28 # Pituffik -4:00 Thule A%sT diff --git a/iso3166.tab b/iso3166.tab index a4ff61a4d321..911af5e837e2 100644 --- a/iso3166.tab +++ b/iso3166.tab @@ -3,13 +3,13 @@ # This file is in the public domain, so clarified as of # 2009-05-17 by Arthur David Olson. # -# From Paul Eggert (2015-05-02): +# From Paul Eggert (2022-11-18): # This file contains a table of two-letter country codes. Columns are # separated by a single tab. Lines beginning with '#' are comments. # All text uses UTF-8 encoding. The columns of the table are as follows: # # 1. ISO 3166-1 alpha-2 country code, current as of -# ISO 3166-1 N976 (2018-11-06). See: Updates on ISO 3166-1 +# ISO 3166-1 N1087 (2022-09-02). See: Updates on ISO 3166-1 # https://isotc.iso.org/livelink/livelink/Open/16944257 # 2. The usual English name for the coded region, # chosen so that alphabetic sorting of subsets produces helpful lists. @@ -238,7 +238,7 @@ SY Syria SZ Eswatini (Swaziland) TC Turks & Caicos Is TD Chad -TF French Southern & Antarctic Lands +TF French Southern Territories TG Togo TH Thailand TJ Tajikistan diff --git a/northamerica b/northamerica index df1954359cce..d50581d00774 100644 --- a/northamerica +++ b/northamerica @@ -1969,6 +1969,37 @@ Zone America/Fort_Nelson -8:10:47 - LMT 1884 # Northwest Territories, Nunavut, Yukon +# From Chris Walton (2022-11-06): +# Whitehorse Star - Thursday April 22, 1965 - page 1 +# title: DST Starts Monday ... +# https://www.newspapers.com/image/578587481/ +# The title of this first article is wrong and/or misleading. +# Also, the start time shown in the article is vague; it simply says "after +# midnight" when it probably should have stated 2:00a.m.... +# +# Whitehorse Star - Monday October 25, 1965 - page 15 ... +# https://www.newspapers.com/image/578589147/ +# The 1965 Yukon Council minutes can be found here: +# http://assets.yukonarchives.ca/PER_YG_06_1965_C20_S02_v1.pdf +# ... I do not currently believe that NWT touched any of its clocks in 1965.... +# +# Whitehorse Star - Thursday Feb 24,1966 - page 2 +# title: It's Time for YDT ... +# https://www.newspapers.com/image/578575979/ ... +# America/Whitehorse as a permanent change from UTC-9(YST) to +# UTC-8(PST) at 00:00 on Sunday February 27, 1966.... +# +# Whitehorse Star - Friday April 28,1972 - page 6 +# title: Daylight Saving Time for N.W.T.... +# https://www.newspapers.com/image/578701610/ ... +# Nunavut and NWT zones ... DST starting in 1972.... Start and End ... +# should be the same as the rest of Canada +# +# +# From Paul Eggert (2022-11-06): +# For now, assume Yukon's 1965-04-22 spring forward was 00:00 -> 02:00, as this +# seems likely than 02:00 -> 04:00 and matches "after midnight". + # From Paul Eggert (2006-03-22): # Dawson switched to PST in 1973. Inuvik switched to MST in 1979. # Mathew Englander (1996-10-07) gives the following refs: @@ -2083,6 +2114,13 @@ Zone America/Fort_Nelson -8:10:47 - LMT 1884 # * Interpretation Act, RSY 2002, c 125 # https://www.canlii.org/en/yk/laws/stat/rsy-2002-c-125/latest/rsy-2002-c-125.html +# From Chris Walton (2022-11-06): +# The 5th edition of the Atlas of Canada contains a time zone map that +# shows both legislated and observed time zone boundaries. +# All communities on Baffin Island are shown to be observing Eastern time. +# The date on the map is 1984. +# https://ftp.maps.canada.ca/pub/nrcan_rncan/raster/atlas_5_ed/eng/other/referencemaps/mcr4056.pdf + # From Rives McDow (1999-09-04): # Nunavut ... moved ... to incorporate the whole territory into one time zone. # Nunavut moves to single time zone Oct. 31 @@ -2095,40 +2133,7 @@ Zone America/Fort_Nelson -8:10:47 - LMT 1884 # From Paul Eggert (1999-09-20): # Basic Facts: The New Territory # http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html -# (1999) reports that Pangnirtung operates on eastern time, -# and that Coral Harbour does not observe DST. We don't know when -# Pangnirtung switched to eastern time; we'll guess 1995. - -# From Rives McDow (1999-11-08): -# On October 31, when the rest of Nunavut went to Central time, -# Pangnirtung wobbled. Here is the result of their wobble: -# -# The following businesses and organizations in Pangnirtung use Central Time: -# -# First Air, Power Corp, Nunavut Construction, Health Center, RCMP, -# Eastern Arctic National Parks, A & D Specialist -# -# The following businesses and organizations in Pangnirtung use Eastern Time: -# -# Hamlet office, All other businesses, Both schools, Airport operator -# -# This has made for an interesting situation there, which warranted the news. -# No one there that I spoke with seems concerned, or has plans to -# change the local methods of keeping time, as it evidently does not -# really interfere with any activities or make things difficult locally. -# They plan to celebrate New Year's turn-over twice, one hour apart, -# so it appears that the situation will last at least that long. -# The Nunavut Intergovernmental Affairs hopes that they will "come to -# their senses", but the locals evidently don't see any problem with -# the current state of affairs. - -# From Michaela Rodrigue, writing in the -# Nunatsiaq News (1999-11-19): -# http://www.nunatsiaqonline.ca/archives/nunavut991130/nvt91119_17.html -# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, -# central - or Nunavut time - for government offices, and eastern time -# for municipal offices and schools.... Igloolik [was similar but then] -# made the switch to central time on Saturday, Nov. 6. +# (1999) reports that ... Coral Harbour does not observe DST. # From Paul Eggert (2000-10-02): # Matthews and Vincent (1998) say the following, but we lack histories @@ -2287,18 +2292,12 @@ Rule NT_YK 1919 only - Nov 1 0:00 0 S Rule NT_YK 1942 only - Feb 9 2:00 1:00 W # War Rule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace Rule NT_YK 1945 only - Sep 30 2:00 0 S -Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD -Rule NT_YK 1965 only - Oct lastSun 2:00 0 S -Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D -Rule NT_YK 1980 2006 - Oct lastSun 2:00 0 S +Rule NT_YK 1972 1986 - Apr lastSun 2:00 1:00 D +Rule NT_YK 1972 2006 - Oct lastSun 2:00 0 S Rule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D +Rule Yukon 1965 only - Apr lastSun 0:00 2:00 DD +Rule Yukon 1965 only - Oct lastSun 2:00 0 S # Zone NAME STDOFF RULES FORMAT [UNTIL] -# aka Panniqtuuq -Zone America/Pangnirtung 0 - -00 1921 # trading post est. - -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 - -5:00 Canada E%sT 1999 Oct 31 2:00 - -6:00 Canada C%sT 2000 Oct 29 2:00 - -5:00 Canada E%sT # formerly Frobisher Bay Zone America/Iqaluit 0 - -00 1942 Aug # Frobisher Bay est. -5:00 NT_YK E%sT 1999 Oct 31 2:00 @@ -2331,13 +2330,15 @@ Zone America/Inuvik 0 - -00 1953 # Inuvik founded -7:00 NT_YK M%sT 1980 -7:00 Canada M%sT Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 - -9:00 NT_YK Y%sT 1967 May 28 0:00 - -8:00 NT_YK P%sT 1980 + -9:00 NT_YK Y%sT 1965 + -9:00 Yukon Y%sT 1966 Feb 27 0:00 + -8:00 - PST 1980 -8:00 Canada P%sT 2020 Nov 1 -7:00 - MST Zone America/Dawson -9:17:40 - LMT 1900 Aug 20 - -9:00 NT_YK Y%sT 1973 Oct 28 0:00 - -8:00 NT_YK P%sT 1980 + -9:00 NT_YK Y%sT 1965 + -9:00 Yukon Y%sT 1973 Oct 28 0:00 + -8:00 - PST 1980 -8:00 Canada P%sT 2020 Nov 1 -7:00 - MST @@ -2559,6 +2560,14 @@ Zone America/Dawson -9:17:40 - LMT 1900 Aug 20 # This abolishes DST except where US DST rules are observed, # and in addition changes all of Chihuahua to -06 with no DST. +# From Heitor David Pinto (2022-11-28): +# Now the northern municipalities want to have the same time zone as the +# respective neighboring cities in the US, for example Juárez in UTC-7 with +# DST, matching El Paso, and Ojinaga in UTC-6 with DST, matching Presidio.... +# the president authorized the publication of the decree for November 29, +# so the time change would occur on November 30 at 0:00. +# http://puentelibre.mx/noticia/ciudad_juarez_cambio_horario_noviembre_2022/ + # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Mexico 1931 only - May 1 23:00 1:00 D Rule Mexico 1931 only - Oct 1 0:00 0 S @@ -2590,14 +2599,12 @@ Zone America/Merida -5:58:28 - LMT 1922 Jan 1 6:00u -6:00 Mexico C%sT # Coahuila, Nuevo León, Tamaulipas (near US border) # This includes the following municipalities: -# in Coahuila: Ocampo, Acuña, Zaragoza, Jiménez, Piedras Negras, Nava, -# Guerrero, Hidalgo. -# in Nuevo León: Anáhuac, Los Aldama. +# in Coahuila: Acuña, Allende, Guerrero, Hidalgo, Jiménez, Morelos, Nava, +# Ocampo, Piedras Negras, Villa Unión, Zaragoza +# in Nuevo León: Anáhuac # in Tamaulipas: Nuevo Laredo, Guerrero, Mier, Miguel Alemán, Camargo, # Gustavo Díaz Ordaz, Reynosa, Río Bravo, Valle Hermoso, Matamoros. -# See: Inicia mañana Horario de Verano en zona fronteriza, El Universal, -# 2016-03-12 -# http://www.eluniversal.com.mx/articulo/estados/2016/03/12/inicia-manana-horario-de-verano-en-zona-fronteriza +# https://www.dof.gob.mx/nota_detalle.php?codigo=5670045&fecha=28/10/2022 Zone America/Matamoros -6:30:00 - LMT 1922 Jan 1 6:00u -6:00 - CST 1988 -6:00 US C%sT 1989 @@ -2616,10 +2623,24 @@ Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 7:00u -6:00 Mexico C%sT 2001 Sep 30 2:00 -6:00 - CST 2002 Feb 20 -6:00 Mexico C%sT -# Chihuahua (near US border) +# Chihuahua (near US border - western side) # This includes the municipalities of Janos, Ascensión, Juárez, Guadalupe, -# Práxedis G Guerrero, Coyame del Sotol, Ojinaga, and Manuel Benavides. -# (See the 2016-03-12 El Universal source mentioned above.) +# and Práxedis G Guerrero. +# http://gaceta.diputados.gob.mx/PDF/65/2a022/nov/20221124-VII.pdf +Zone America/Ciudad_Juarez -7:05:56 - LMT 1922 Jan 1 7:00u + -7:00 - MST 1927 Jun 10 23:00 + -6:00 - CST 1930 Nov 15 + -7:00 Mexico M%sT 1932 Apr 1 + -6:00 - CST 1996 + -6:00 Mexico C%sT 1998 + -6:00 - CST 1998 Apr Sun>=1 3:00 + -7:00 Mexico M%sT 2010 + -7:00 US M%sT 2022 Oct 30 2:00 + -6:00 - CST 2022 Nov 30 0:00 + -7:00 US M%sT +# Chihuahua (near US border - eastern side) +# The municipalities of Coyame del Sotol, Ojinaga, and Manuel Benavides. +# http://gaceta.diputados.gob.mx/PDF/65/2a022/nov/20221124-VII.pdf Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 7:00u -7:00 - MST 1927 Jun 10 23:00 -6:00 - CST 1930 Nov 15 @@ -2629,7 +2650,8 @@ Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 7:00u -6:00 - CST 1998 Apr Sun>=1 3:00 -7:00 Mexico M%sT 2010 -7:00 US M%sT 2022 Oct 30 2:00 - -6:00 - CST + -6:00 - CST 2022 Nov 30 0:00 + -6:00 US C%sT # Chihuahua (away from US border) Zone America/Chihuahua -7:04:20 - LMT 1922 Jan 1 7:00u -7:00 - MST 1927 Jun 10 23:00 @@ -2651,6 +2673,18 @@ Zone America/Hermosillo -7:23:52 - LMT 1922 Jan 1 7:00u -7:00 Mexico M%sT 1999 -7:00 - MST +# Baja California Sur, Nayarit (except Bahía de Banderas), Sinaloa +Zone America/Mazatlan -7:05:40 - LMT 1922 Jan 1 7:00u + -7:00 - MST 1927 Jun 10 23:00 + -6:00 - CST 1930 Nov 15 + -7:00 Mexico M%sT 1932 Apr 1 + -6:00 - CST 1942 Apr 24 + -7:00 - MST 1949 Jan 14 + -8:00 - PST 1970 + -7:00 Mexico M%sT + +# Bahía de Banderas + # From Alexander Krivenyshev (2010-04-21): # According to news, Bahía de Banderas (Mexican state of Nayarit) # changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to @@ -2678,17 +2712,6 @@ Zone America/Hermosillo -7:23:52 - LMT 1922 Jan 1 7:00u # From Arthur David Olson (2010-05-01): # Use "Bahia_Banderas" to keep the name to fourteen characters. -# Mazatlán -Zone America/Mazatlan -7:05:40 - LMT 1922 Jan 1 7:00u - -7:00 - MST 1927 Jun 10 23:00 - -6:00 - CST 1930 Nov 15 - -7:00 Mexico M%sT 1932 Apr 1 - -6:00 - CST 1942 Apr 24 - -7:00 - MST 1949 Jan 14 - -8:00 - PST 1970 - -7:00 Mexico M%sT - -# Bahía de Banderas Zone America/Bahia_Banderas -7:01:00 - LMT 1922 Jan 1 7:00u -7:00 - MST 1927 Jun 10 23:00 -6:00 - CST 1930 Nov 15 diff --git a/southamerica b/southamerica index 13cc65efa32b..87b71d5f9210 100644 --- a/southamerica +++ b/southamerica @@ -1418,9 +1418,14 @@ Zone Antarctica/Palmer 0 - -00 1965 # Milne gives 4:56:16.4 for Bogotá time in 1899. He writes, # "A variation of fifteen minutes in the public clocks of Bogota is not rare." +# From Alois Treindl (2022-11-10): +# End of time change in Colombia 1993 ... should be 6 February 24h ... +# DECRETO 267 DE 1993 +# https://www.suin-juriscol.gov.co/viewDocument.asp?ruta=Decretos/1061335 + # Rule NAME FROM TO - IN ON AT SAVE LETTER/S -Rule CO 1992 only - May 3 0:00 1:00 - -Rule CO 1993 only - Apr 4 0:00 0 - +Rule CO 1992 only - May 3 0:00 1:00 - +Rule CO 1993 only - Feb 6 24:00 0 - # Zone NAME STDOFF RULES FORMAT [UNTIL] #STDOFF -4:56:16.4 Zone America/Bogota -4:56:16 - LMT 1884 Mar 13 diff --git a/theory.html b/theory.html index 298db866b39c..75e347f0f9d1 100644 --- a/theory.html +++ b/theory.html @@ -60,7 +60,6 @@ with current and future timestamps in the traditional North American mountain time zone can choose from the timezones <code>America/Denver</code> which observes US-style daylight saving time (<abbr>DST</abbr>), -<code>America/Mazatlan</code> which observes Mexican-style <abbr>DST</abbr>, and <code>America/Phoenix</code> which does not observe <abbr>DST</abbr>. Applications that also deal with past timestamps in the mountain time zone can choose from over a dozen timezones, such as @@ -1 +1 @@ -2022f +2022g @@ -114,8 +114,7 @@ CA +4606-06447 America/Moncton Atlantic - New Brunswick CA +5320-06025 America/Goose_Bay Atlantic - Labrador (most areas) CA +5125-05707 America/Blanc-Sablon AST - QC (Lower North Shore) CA +4339-07923 America/Toronto Eastern - ON, QC (most areas) -CA +6344-06828 America/Iqaluit Eastern - NU (most east areas) -CA +6608-06544 America/Pangnirtung Eastern - NU (Pangnirtung) +CA +6344-06828 America/Iqaluit Eastern - NU (most areas) CA +484531-0913718 America/Atikokan EST - ON (Atikokan); NU (Coral H) CA +4953-09709 America/Winnipeg Central - ON (west); Manitoba CA +744144-0944945 America/Resolute Central - NU (Resolute) @@ -277,17 +276,18 @@ MT +3554+01431 Europe/Malta MU -2010+05730 Indian/Mauritius MV +0410+07330 Indian/Maldives MW -1547+03500 Africa/Blantyre -MX +1924-09909 America/Mexico_City Central Time -MX +2105-08646 America/Cancun Eastern Standard Time - Quintana Roo -MX +2058-08937 America/Merida Central Time - Campeche, Yucatan -MX +2540-10019 America/Monterrey Central Time - Durango; Coahuila, Nuevo Leon, Tamaulipas (most areas) -MX +2550-09730 America/Matamoros Central Time US - Coahuila, Nuevo Leon, Tamaulipas (US border) -MX +2313-10625 America/Mazatlan Mountain Time - Baja California Sur, Nayarit, Sinaloa -MX +2838-10605 America/Chihuahua Mountain Time - Chihuahua (most areas) -MX +2934-10425 America/Ojinaga Mountain Time US - Chihuahua (US border) -MX +2904-11058 America/Hermosillo Mountain Standard Time - Sonora -MX +3232-11701 America/Tijuana Pacific Time US - Baja California -MX +2048-10515 America/Bahia_Banderas Central Time - Bahia de Banderas +MX +1924-09909 America/Mexico_City Central Mexico +MX +2105-08646 America/Cancun Quintana Roo +MX +2058-08937 America/Merida Campeche, Yucatan +MX +2540-10019 America/Monterrey Durango; Coahuila, Nuevo Leon, Tamaulipas (most areas) +MX +2550-09730 America/Matamoros Coahuila, Nuevo Leon, Tamaulipas (US border) +MX +2838-10605 America/Chihuahua Chihuahua (most areas) +MX +3144-10629 America/Ciudad_Juarez Chihuahua (US border - west) +MX +2934-10425 America/Ojinaga Chihuahua (US border - east) +MX +2313-10625 America/Mazatlan Baja California Sur, Nayarit (most areas), Sinaloa +MX +2048-10515 America/Bahia_Banderas Bahia de Banderas +MX +2904-11058 America/Hermosillo Sonora +MX +3232-11701 America/Tijuana Baja California MY +0310+10142 Asia/Kuala_Lumpur Malaysia (peninsula) MY +0133+11020 Asia/Kuching Sabah, Sarawak MZ -2558+03235 Africa/Maputo diff --git a/zone1970.tab b/zone1970.tab index 75372e3fa422..a9b36d36a56a 100644 --- a/zone1970.tab +++ b/zone1970.tab @@ -102,8 +102,7 @@ CA +4612-05957 America/Glace_Bay Atlantic - NS (Cape Breton) CA +4606-06447 America/Moncton Atlantic - New Brunswick CA +5320-06025 America/Goose_Bay Atlantic - Labrador (most areas) CA,BS +4339-07923 America/Toronto Eastern - ON, QC (most areas), Bahamas -CA +6344-06828 America/Iqaluit Eastern - NU (most east areas) -CA +6608-06544 America/Pangnirtung Eastern - NU (Pangnirtung) +CA +6344-06828 America/Iqaluit Eastern - NU (most areas) CA +4953-09709 America/Winnipeg Central - ON (west); Manitoba CA +744144-0944945 America/Resolute Central - NU (Resolute) CA +624900-0920459 America/Rankin_Inlet Central - NU (central) @@ -214,17 +213,18 @@ MQ +1436-06105 America/Martinique MT +3554+01431 Europe/Malta MU -2010+05730 Indian/Mauritius MV,TF +0410+07330 Indian/Maldives Maldives, Kerguelen, St Paul I, Amsterdam I -MX +1924-09909 America/Mexico_City Central Time -MX +2105-08646 America/Cancun Eastern Standard Time - Quintana Roo -MX +2058-08937 America/Merida Central Time - Campeche, Yucatán -MX +2540-10019 America/Monterrey Central Time - Durango; Coahuila, Nuevo León, Tamaulipas (most areas) -MX +2550-09730 America/Matamoros Central Time US - Coahuila, Nuevo León, Tamaulipas (US border) -MX +2313-10625 America/Mazatlan Mountain Time - Baja California Sur, Nayarit, Sinaloa -MX +2838-10605 America/Chihuahua Mountain Time - Chihuahua (most areas) -MX +2934-10425 America/Ojinaga Mountain Time US - Chihuahua (US border) -MX +2904-11058 America/Hermosillo Mountain Standard Time - Sonora -MX +3232-11701 America/Tijuana Pacific Time US - Baja California -MX +2048-10515 America/Bahia_Banderas Central Time - Bahía de Banderas +MX +1924-09909 America/Mexico_City Central Mexico +MX +2105-08646 America/Cancun Quintana Roo +MX +2058-08937 America/Merida Campeche, Yucatán +MX +2540-10019 America/Monterrey Durango; Coahuila, Nuevo León, Tamaulipas (most areas) +MX +2550-09730 America/Matamoros Coahuila, Nuevo León, Tamaulipas (US border) +MX +2838-10605 America/Chihuahua Chihuahua (most areas) +MX +3144-10629 America/Ciudad_Juarez Chihuahua (US border - west) +MX +2934-10425 America/Ojinaga Chihuahua (US border - east) +MX +2313-10625 America/Mazatlan Baja California Sur, Nayarit (most areas), Sinaloa +MX +2048-10515 America/Bahia_Banderas Bahía de Banderas +MX +2904-11058 America/Hermosillo Sonora +MX +3232-11701 America/Tijuana Baja California MY,BN +0133+11020 Asia/Kuching Sabah, Sarawak, Brunei MZ,BI,BW,CD,MW,RW,ZM,ZW -2558+03235 Africa/Maputo Central Africa Time NA -2234+01706 Africa/Windhoek |