- tz - lists.iana.org

Problem with historical Asia/Manila?
by Paul Goyette March 2, 2017

March 2, 2017

According to the asia file, the Philippines jumped 24 hours on May 11, 1899, from -15:56:00 to +8:04:00 (they moved the international date line?) # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Asia/Manila -15:56:00 - LMT 1844 Dec 31 8:04:00 - LMT 1899 May 11 8:00 Phil +08/+09 1942 May 9:00 - +09 1944 Nov 8:00 Phil +08/+09 Yet zdump shows only a 4-minute step in local time, rather than the expected 24-hour step: # zdump -c 1815,2018 -v Asia/Manila Asia/Manila -9223372036854775808 = NULL Asia/Manila -9223372036854689408 = NULL Asia/Manila Tue Dec 31 15:55:59 1844 UT = Mon Dec 30 23:59:59 1844 LMT isdst=0 gmtoff=-57360 Asia/Manila Tue Dec 31 15:56:00 1844 UT = Wed Jan 1 00:00:00 1845 LMT isdst=0 gmtoff=29040 Asia/Manila Wed May 10 15:55:59 1899 UT = Wed May 10 23:59:59 1899 LMT isdst=0 gmtoff=29040 Asia/Manila Wed May 10 15:56:00 1899 UT = Wed May 10 23:56:00 1899 +08 isdst=0 gmtoff=28800 Asia/Manila Sat Oct 31 15:59:59 1936 UT = Sat Oct 31 23:59:59 1936 +08 isdst=0 gmtoff=28800 ... Obviously a low-priority issue, since it's more than 100 years ago, but still would be nice to know why we have a problem. It's not totally out of the realm of probability that someone will move the dateline again, perhaps if the UTC+14 parts of Kiribati were to separate from the rest of the country? :) Data gathered on a NetBSD 7.99.64 system running on amd64 hardware, and using the 2017a tzdata. I think we're still running 2016i version of tzcode. So the question(s): * is zdump wrong? * is the compiled data file wrong? * (most likely) am I just misinterpreting the data? * is this something that has already been fixed in a more recent tzcode release? +------------------+--------------------------+------------------------+ | Paul Goyette | PGP Key fingerprint: | E-mail addresses: | | (Retired) | FA29 0E3B 35AF E8AE 6651 | paul at whooppee.com | | Kernel Developer | 0786 F758 55DE 53BA 7731 | pgoyette at netbsd.org | +------------------+--------------------------+------------------------+

3 3

zic throws warning for 2007a
by Derick Rethans March 1, 2017

March 1, 2017

Hi, I've just updated the PHP version of the TZ database, and while compiling with the current zic, I see: warning: "standard input", line 434: time zone abbreviation has too many characters (-004430) This is because of: 24 #ifndef ZIC_MAX_ABBR_LEN_WO_WARN 25 #define ZIC_MAX_ABBR_LEN_WO_WARN 6 26 #endif /* !defined ZIC_MAX_ABBR_LEN_WO_WARN */ 3108 if (cp - string > ZIC_MAX_ABBR_LEN_WO_WARN) 3109 mp = _("time zone abbreviation has too many characters"); That check was introduced in 2012j as per NEWS: Release 2012j - 2012-11-12 18:34:49 -0800 ... zic -v now complains about abbreviations that are less than 3 or more than 6 characters, as per Posix. Formerly, it checked for abbreviations that were more than 3. cheers, Derick -- https://derickrethans.nl | https://xdebug.org | https://dram.io Like Xdebug? Consider a donation: https://xdebug.org/donate.php twitter: @derickr and @xdebug

6 6

TZ changes
by Igor Trud Feb. 28, 2017

Feb. 28, 2017

Hi. Europe/Volgograd is not in MSK ( GMT+3) since 03 Dec 2016 Now, its MSK + 1 (GMT +4). Should tzinfo database accept this change ? Thanks. Igor.

2 1

[PATCH] Fix warnings if !ALL_STATE: address of gmtmem always, evaluates as true
by Andreas Stieger Feb. 28, 2017

Feb. 28, 2017

Hello, fixes some compiler warnings: If ALL_STATE is not defined, the address of gmtcheck always evaluates to true. Andreas -- Andreas Stieger <astieger(a)suse.com> Project Manager Security SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)

2 3

[tz-announce] 2017a release of tz code and data available
by Paul Eggert Feb. 28, 2017

Feb. 28, 2017

The 2017a release of the tz code and data is available. It reflects the following changes, which were either circulated on the tz mailing list or are relatively minor technical or administrative changes: Briefly: Southern Chile moves from -04/-03 to -03, and Mongolia discontinues DST. Changes to future time stamps Mongolia no longer observes DST. (Thanks to Ganbold Tsagaankhuu.) Chile's Region of Magallanes moves from -04/-03 to -03 year-round. Its clocks diverge from America/Santiago starting 2017-05-13 at 23:00, hiving off a new zone America/Punta_Arenas. Although the Chilean government says this change expires in May 2019, for now assume it's permanent. (Thanks to Juan Correa and Deborah Goldsmith.) This also affects Antarctica/Palmer. Changes to past time stamps Fix many entries for historical time stamps for Europe/Madrid before 1979, to agree with tables compiled by Pere Planesas of the National Astronomical Observatory of Spain. As a side effect, this changes some time stamps for Africa/Ceuta before 1929, which are probably guesswork anyway. (Thanks to Steve Allen and Pierpaolo Bernardi for the heads-ups, and to Michael Deckers for correcting the 1901 transition.) Ecuador observed DST from 1992-11-28 to 1993-02-05. (Thanks to Alois Treindl.) Asia/Atyrau and Asia/Oral were at +03 (not +04) before 1930-06-21. (Thanks to Stepan Golosunov.) Changes to past and future time zone abbreviations Switch to numeric time zone abbreviations for South America, as part of the ongoing project of removing invented abbreviations. This avoids the need to invent an abbreviation for the new Chilean new zone. Similarly, switch from invented to numeric time zone abbreviations for Afghanistan, American Samoa, the Azores, Bangladesh, Bhutan, the British Indian Ocean Territory, Brunei, Cape Verde, Chatham Is, Christmas I, Cocos (Keeling) Is, Cook Is, Dubai, East Timor, Eucla, Fiji, French Polynesia, Greenland, Indochina, Iran, Iraq, Kiribati, Lord Howe, Macquarie, Malaysia, the Maldives, Marshall Is, Mauritius, Micronesia, Mongolia, Myanmar, Nauru, Nepal, New Caledonia, Niue, Norfolk I, Palau, Papua New Guinea, the Philippines, Pitcairn, Qatar, Réunion, St Pierre & Miquelon, Samoa, Saudi Arabia, Seychelles, Singapore, Solomon Is, Tokelau, Tuvalu, Wake, Vanuatu, Wallis & Futuna, and Xinjiang; for 20-minute daylight saving time in Ghana before 1943; for half-hour daylight saving time in Belize before 1944 and in the Dominican Republic before 1975; and for Canary Islands before 1946, for Guinea-Bissau before 1975, for Iceland before 1969, for Indian Summer Time before 1942, for Indonesia before around 1964, for Kenya before 1960, for Liberia before 1973, for Madeira before 1967, for Namibia before 1943, for the Netherlands in 1937-9, for Pakistan before 1971, for Western Sahara before 1977, and for Zaporozhye in 1880-1924. For Alaska time from 1900 through 1967, instead of "CAT" use the abbreviation "AST", the abbreviation commonly used at the time (Atlantic Standard Time had not been standardized yet). Use "AWT" and "APT" instead of the invented abbreviations "CAWT" and "CAPT". Use "CST" and "CDT" instead of invented abbreviations for Macau before 1999 and Taiwan before 1938, and use "JST" instead of the invented abbreviation "JCST" for Japan and Korea before 1938. Change to database entry category Move the Pacific/Johnston link from 'australasia' to 'backward', since Johnston is now uninhabited. Changes to code zic no longer mishandles some transitions in January 2038 when it attempts to work around Qt bug 53071. This fixes a bug affecting Pacific/Tongatapu that was introduced in zic 2016e. localtime.c now contains a workaround, useful when loading a file generated by a buggy zic. (Problem and localtime.c fix reported by Bradley White.) zdump -i now outputs non-hour numeric time zone abbreviations without a colon, e.g., "+0530" rather than "+05:30". This agrees with zic %z and with common practice, and simplifies auditing of zdump output. zdump is now buildable again with -DUSE_LTZ=0. (Problem reported by Joseph Myers.) zdump.c now always includes private.h, to avoid code duplication with private.h. (Problem reported by Kees Dekker.) localtime.c no longer mishandles early or late timestamps when TZ is set to a POSIX-style string that specifies DST. (Problem reported by Kees Dekker.) date and strftime now cause %z to generate "-0000" instead of "+0000" when the UT offset is zero and the time zone abbreviation begins with "-". Changes to documentation and commentary The 'Theory' file now better documents choice of historical time zone abbreviations. (Problems reported by Michael Deckers.) tz-link.htm now covers leap smearing, which is popular in clouds. Here are links to the release files: https://www.iana.org/time-zones/repository/releases/tzcode2017a.tar.gz https://www.iana.org/time-zones/repository/releases/tzdata2017a.tar.gz https://www.iana.org/time-zones/repository/releases/tzdb-2017a.tar.lz As usual, links to the latest release files are here: https://www.iana.org/time-zones/repository/tzcode-latest.tar.gz https://www.iana.org/time-zones/repository/tzdata-latest.tar.gz https://www.iana.org/time-zones/repository/tzdb-latest.tar.lz Links are also available via plain HTTP, and via FTP from ftp://ftp.iana.org/tz/releases with the same basenames as above. Each release file has a GPG signature, which can be retrieved by appending ".asc" to the above URLs. Copies of these signatures are appended to this message. This release corresponds to commit 8beaf3b064b8edcb09babb62e530993808003802 dated 2017-02-28 00:05:36 -0800 and tagged '2017a' in the development GitHub repository at <https://github.com/eggert/tz>. Here are the SHA-512 checksums for the release files: 36d744debd5263b6be39b3a9a146b7db1876f216a4bfc62b46631745861a9c03eda3220f213def86c724d3a11c41398c65c2e5d013ff2c1900e7bfc5e7844025 tzcode2017a.tar.gz fe57930711998a0755749a2bf1b32fdbc9e6ee249762017beea52eae7e521236396300fe2d79298fd81eb6d73fb7567884c35995ed248be06188329d937e3873 tzdata2017a.tar.gz 9004e74718455e8199f4dc301a7e3f74dfa37b5ed9de4a41f2cd88a97e759f8f2aea7bb92c0c022515eab88a2169f08606c47c621479374f884130a34bfc188c tzdb-2017a.tar.lz Here are the GPG checksums for the release files: -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAABAgAGBQJYtTBSAAoJEO2X6Q5iqn40sWUQAJ8XTHkp/BXYPfwQf3SXJkog e2jXeW4U5CtmBvo5SmENeWVd69piEBsbgVYmzfIIQy9kXt/jJcHIuBAIUVF6UqSx 4MOeogfrM0+cqXNWZMza26aHivOf8ypqnyekVtrHf0z3oC7EhwPcfZWIeVqgS0Oc 5PAja8V/jewcq1vaIk8lp7cJ2eUGJRNQSco4Vd0jsoltrb52Vn7WJ/sf/EYS+gTs B/iEiSN+SFHhnkNLUlm5xoJib0+wBrZzEqowoPel54h0XT9pA+sUdbeW+w6VeQPz JiJbFQwKvZIdADcPseGyYaexEiSHuUokwGOGsoB14kEUwlIjvSgUq7l2CuIvmLFA fH7edetBYmedN9sbO1Sa2dJAiL4W0kbERW9EtKZ1G5ixOEVz/dtTEMznj2JTi3bl yTs1rSBMeZogjo0nySZeK4KpoL5VOxdze05g+DQ/jbeksCOwPPTtHtNf9tK1fwgy GyBt5R0U6j/Hjm0mQgiK4enmVxa55HVCCXnbyo/A08u0x7U5g16ebiSax/q5bW5I IAgYRBYzanccBVjIg0bW0pQXzJ5fmPnHo20dxkRlIqTAkoVTF62fOio5LCN4XQRK dt57WuvEHj4MIwj/12dipcCY1qFlqxOx3BegEQNvVd67z0Z4cBVW/Ng2RmjSGtEl 0DBAIPPrMvZ5pwWJZiJF =EVYD -----END PGP SIGNATURE----- -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAABAgAGBQJYtTBSAAoJEO2X6Q5iqn40qlgP/i6xLqi7ojaiKm9x7ZmYDVxh ggMmRyR8YDE8/eSSZB03fayVCIdVNj96J2t9beJXnyRISZbhOj3vPrlSziCBNR29 QjX6Sbh3N7y2QlWvgdExqqKCM69zV3Q9Zz51cFz4kiACue0dvmPYWPjUqvV1m42W BiqL9oVwhvbnp14kJVcLOQINrlhWOTY4/MDfBQAVMPpvntJSpitOnC4y30xLsie2 1MR6/oHVuEhmrfk8ePhgwVm64lg6o8sVl26kO/baNeqo0ST/LAP2CJqhM+54YB+c 0IK7kXk4Te97Hq0/0G7ZHugySjVIQGvrcI7bIcam9pXVRCveRJvdGH5OZpY1MD09 RF66Y4n9E1iD4MlQEgaizjAIjy8JrwJUc0W9m/GHSJecwYZXKbZYkqQpgQGfpA4/ fz3+BUr0AaUh/JGtdyXTm9v/JEwvJsJvu77wtSNLyA4+XR3cZOfhgJ5syw7tDCXy tBHIl74845Ky/FrheXp7vfOUayEn623r7RyLEOt65v7Qn2AwDwc+u73qpVW/e25r bD7mWDLXOyFgERhTLZafRahMxugFTl1mFikygI12TvDPvsgcBwAEDUDdu8e3MU1+ HdoBu6aGIMP8OLqN3cqrJlUF/dqn/JeeGnUAVQZlXHb7oWu7mf7OOrIzjQC5xG8y KDL+94hpsq/thK712LfA =+3fY -----END PGP SIGNATURE----- -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAABAgAGBQJYtTBSAAoJEO2X6Q5iqn40xF0P/33nPe1C0P4EGhqzkXce/Bee iKYHWfeYXzXdRoQrjLGWuzUP2hJhZVq0Sw6ylYXwHwf0lVs2PfkFnkDfeV+5z7Fw cABcJO35B9GeSxXFhYvznvK2Azes0YYQ1ltBcNxaLeDTyi/a+vVexvzxrkbh+Vx7 wDf5ZS0Xn7Jtq+fTG1K7WVSzETw39Bw29E2K/ITWSEg83WJ8Db3IuhlC6hmu6lyF C6cMY+6qY7XylvOLqZkF2b1+l6d+TNI+5s+wNchq/tZQzShGKsjCPAx4xj7ebUtt JJAJzWuw6OHkXsor2dKpcRuqhrTQx6Oybfj85WA3+kNWaTTdDa2oxWOXGDzK5ySU hFxJFD1Q1U5nUkxMBdEKsuG2P3JPLEH0sVJX9TwMnyAlZM3mI9sJMGnP9ssOearG 0mF+kL7fQB3Y2+y67i9cFNJRNchK6O4/FiBe+PdNYXwSrlPqt+9VlEdqq6B3jkJe /gBJCi1lMpk9tVAntxtMWCvYr9pZn6eQnyBGW8urdUMdNcsr1w1SxGf1bPT5zpKM zhPfHlVJxS0lP6aTwxEMUKhM5WXZcw10kR3oabLZOmQUGuZPG7JUWL1T7hie6FAf Wso1rz/Pw08dMvLsU8R0lSj5IQFCioOm0NP/seo/dG032CY2AGh32PpPfegziiA5 N0j4ihRNDSRAKySyK1WY =TwWB -----END PGP SIGNATURE----- _______________________________________________ tz-announce mailing list tz-announce(a)iana.org https://mm.icann.org/mailman/listinfo/tz-announce

1 0

ISO 3166 (GB): United Kingdom
by Andreas Stieger Feb. 28, 2017

Feb. 28, 2017

Hello, the attached corrects the ISO 3166 short name from "Britain (UK)" to "United Kingdom". Andreas -- Andreas Stieger <astieger(a)suse.com> Project Manager Security SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)

5 4

Montana proposed DST cancellation
by Andreas Stieger Feb. 27, 2017

Feb. 27, 2017

Hello, The proposed Montana DST changes was mentioned before: http://mm.icann.org/pipermail/tz/2017-February/024849.html Just noting that SB 206 [1] passed 3rd Reading [2] in the Montana Senate and is now in House Committee. [1] http://leg.mt.gov/bills/2017/billpdf/SB0206.pdf [2] http://laws.leg.mt.gov/legprd/LAW0203W$BSRV.ActionQuery?P_SESS=20171&P_BLTP… Andreas -- Andreas Stieger <astieger(a)suse.com> Project Manager Security SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)

2 1

[PROPOSED] Fix Sierra Leone typo for 1957
by Paul Eggert Feb. 23, 2017

Feb. 23, 2017

* backzone (Africa/Freetown): Fix typo in time zone abbreviation for January through May 1957. (Thanks to Michael Deckers.) --- backzone | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/backzone b/backzone index 119584a..9ce7831 100644 --- a/backzone +++ b/backzone @@ -129,7 +129,7 @@ Rule SL 1957 1962 - Sep 1 0:00 0 GMT Zone Africa/Freetown -0:53:00 - LMT 1882 -0:53:00 - FMT 1913 Jun # Freetown Mean Time -1:00 SL %s 1957 - 0:00 SL %s + 0:00 SL GMT/+01 # Botswana # From Paul Eggert (2013-02-21): -- 2.9.3

1 0

TIme zones in the arts: xkcd #1799
by Ice Karma (J. Connell) 「氷宿縁」 Feb. 23, 2017

Feb. 23, 2017

Many of you may have already seen this, but for the benefit of those who have not: Bad Map Projection: Time Zones <https://xkcd.com/1799/> —Ice Karma

1 0

[PROPOSED 1/7] Remove many invented abbrs in 'africa', 'backzone'
by Paul Eggert Feb. 23, 2017

Feb. 23, 2017

* NEWS: Document this. * africa (Atlantic/Cape_Verde, Africa/Accra, Africa/Bissau) (Africa/Nairobi, Africa/Monrovia, Indian/Mauritius, Africa/El_Aaiun) (Africa/Windhoek, Indian/Reunion, Indian/Mahe): * backzone (Africa/Bamako, Africa/Banjul, Africa/Conakry) (Africa/Dakar, Africa/Dar_es_Salaam, SL, Africa/Kampala): (Africa/Luanda, Africa/Mogadishu, Africa/Niamey, Africa/Nouakchott) (America/Argentina/ComodRivadavia, America/Aruba, America/Rosario) (Asia/Aden, Asia/Bahrain, Asia/Chongqing, Asia/Hanoi, Asia/Harbin) (Asia/Kashgar, Asia/Kuwait, Asia/Muscat, Asia/Phnom_Penh) (Asia/Vientiane, Atlantic/Jan_Mayen, Pacific/Midway, Pacific/Saipan): Prefer numeric time zone abbreviations to invented or dubious ones. --- NEWS | 30 ++++++++------ africa | 90 ++++++++++++++++++++---------------------- backzone | 136 +++++++++++++++++++++++++++++++-------------------------------- 3 files changed, 126 insertions(+), 130 deletions(-) diff --git a/NEWS b/NEWS index b3273ce..185524f 100644 --- a/NEWS +++ b/NEWS @@ -39,19 +39,23 @@ Unreleased, experimental changes new zone. Similarly, switch from invented to numeric time zone abbreviations for Afghanistan, American Samoa, the Azores, Bangladesh, Bhutan, the British Indian Ocean Territory, Brunei, - Chatham Is, Christmas I, Cocos (Keeling) Is, Cook Is, Dubai, East - Timor, Eucla, Fiji, French Polynesia, Greenland, Indochina, Iran, - Iraq, Kiribati, Lord Howe, Macquarie, Malaysia, the Maldives, - Marshall Is, Micronesia, Mongolia, Myanmar, Nauru, Nepal, New - Caledonia, Niue, Norfolk I, Palau, Papua New Guinea, the - Philippines, Pitcairn, Qatar, St Pierre & Miquelon, Samoa, Saudi - Arabia, Singapore, Solomon Is, Tokelau, Tuvalu, Wake, Vanuatu, - Wallis & Futuna, and Xinjiang; for half-hour daylight saving time - in Belize before 1944 and in the Dominican Republic before 1975; - and for Canary Islands before 1946, for Madeira before 1967, for - Iceland before 1969, for Indian Summer Time before 1942, for - Indonesia before around 1964, for the Netherlands in 1937-9, for - Pakistan before 1971, and for Zaporozhye in 1880-1924. + Cape Verde, Chatham Is, Christmas I, Cocos (Keeling) Is, Cook Is, + Dubai, East Timor, Eucla, Fiji, French Polynesia, Greenland, + Indochina, Iran, Iraq, Kiribati, Lord Howe, Macquarie, Malaysia, + the Maldives, Marshall Is, Mauritius, Micronesia, Mongolia, + Myanmar, Nauru, Nepal, New Caledonia, Niue, Norfolk I, Palau, + Papua New Guinea, the Philippines, Pitcairn, Qatar, Réunion, St + Pierre & Miquelon, Samoa, Saudi Arabia, Seychelles, Singapore, + Solomon Is, Tokelau, Tuvalu, Wake, Vanuatu, Wallis & Futuna, and + Xinjiang; for 20-minute daylight saving time in Ghana before 1943; + for half-hour daylight saving time in Belize before 1944 and in + the Dominican Republic before 1975; and for Canary Islands before + 1946, for Guinea-Bissau before 1975, for Iceland before 1969, for + Indian Summer Time before 1942, for Indonesia before around 1964, + for Kenya before 1960, for Liberia before 1973, for Madeira before + 1967, for Namibia before 1943, for the Netherlands in 1937-9, for + Pakistan before 1971, for Western Sahara before 1977, and for + Zaporozhye in 1880-1924. For Alaska time from 1900 through 1967, instead of "CAT" use the abbreviation "AST", the abbreviation commonly used at the time diff --git a/africa b/africa index 010050e..2faeb27 100644 --- a/africa +++ b/africa @@ -6,7 +6,7 @@ # tz(a)iana.org for general use in the future). For more, please see # the file CONTRIBUTING in the tz distribution. -# From Paul Eggert (2017-02-10): +# From Paul Eggert (2017-02-20): # # Unless otherwise specified, the source for data through 1990 is: # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), @@ -31,39 +31,33 @@ # A reliable and entertaining source about time zones is # Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997). # +# 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 -# for +0:00 through +3:00, respectively, -# but Mark R V Murray reports that -# 'SAST' is the official abbreviation for +2:00 in the country of South Africa, -# 'CAT' is commonly used for +2:00 in countries north of South Africa, and -# 'WAT' is probably the best name for +1:00, as the common phrase for +# for UT +00 through +03, respectively, +# but in 1997 Mark R V Murray reported that +# 'SAST' is the official abbreviation for +02 in the country of South Africa, +# 'CAT' is commonly used for +02 in countries north of South Africa, and +# 'WAT' is probably the best name for +01, as the common phrase for # the area that includes Nigeria is "West Africa". -# He has heard of "Western Sahara Time" for +0:00 but can find no reference. -# -# To make things confusing, 'WAT' seems to have been used for -1:00 long ago; -# I'd guess that this was because people needed _some_ name for -1:00, -# and at the time, far west Africa was the only major land area in -1:00. -# This usage is now obsolete, as the last use of -1:00 on the African -# mainland seems to have been 1976 in Western Sahara. -# -# To summarize, the following abbreviations seem to have some currency: -# -1:00 WAT West Africa Time (no longer used) -# 0:00 GMT Greenwich Mean Time -# 2:00 CAT Central Africa Time -# 2:00 SAST South Africa Standard Time -# and Murray suggests the following abbreviation: -# 1:00 WAT West Africa Time -# I realize that this leads to 'WAT' being used for both -1:00 and 1:00 -# for times before 1976, but this is the best I can think of -# until we get more information. +# +# To summarize, the following abbreviations seemed to have some currency: +# +00 GMT Greenwich Mean Time +# +02 CAT Central Africa Time +# +02 SAST South Africa Standard Time +# and Murray suggested the following abbreviation: +# +01 WAT West Africa Time +# Murray's suggestion seems to have caught on in news reports and the like. +# I vaguely recall 'WAT' also being used for -01 in the past but +# cannot now come up with solid citations. # # I invented the following abbreviations; corrections are welcome! -# 2:00 WAST West Africa Summer Time -# 2:30 BEAT British East Africa Time (no longer used) -# 2:45 BEAUT British East Africa Unified Time (no longer used) -# 3:00 CAST Central Africa Summer Time (no longer used) -# 3:00 SAST South Africa Summer Time (no longer used) -# 3:00 EAT East Africa Time +# +02 WAST West Africa Summer Time +# +03 CAST Central Africa Summer Time (no longer used) +# +03 SAST South Africa Summer Time (no longer used) +# +03 EAT East Africa Time +# 'EAT' also seems to have caught on; the others are rare but are paired +# with better-attested non-DST abbreviations. # Algeria # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S @@ -121,17 +115,17 @@ Zone Africa/Algiers 0:12:12 - LMT 1891 Mar 15 0:01 # Cape Verde / Cabo Verde # -# Shanks gives 1907 for the transition to CVT. +# Shanks gives 1907 for the transition to +02. # Perhaps the 1911-05-26 Portuguese decree -# http://dre.pt/pdf1sdip/1911/05/12500/23132313.pdf +# https://dre.pt/pdf1sdip/1911/05/12500/23132313.pdf # merely made it official? # # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Atlantic/Cape_Verde -1:34:04 - LMT 1907 # Praia - -2:00 - CVT 1942 Sep - -2:00 1:00 CVST 1945 Oct 15 - -2:00 - CVT 1975 Nov 25 2:00 - -1:00 - CVT + -2:00 - -02 1942 Sep + -2:00 1:00 -01 1945 Oct 15 + -2:00 - -02 1975 Nov 25 2:00 + -1:00 - -01 # Central African Republic # See Africa/Lagos. @@ -388,7 +382,7 @@ Rule Ghana 1920 1942 - Sep 1 0:00 0:20 GHST Rule Ghana 1920 1942 - Dec 31 0:00 0 GMT # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Africa/Accra -0:00:52 - LMT 1918 - 0:00 Ghana %s + 0:00 Ghana GMT/+0020 # Guinea # See Africa/Abidjan. @@ -397,20 +391,20 @@ Zone Africa/Accra -0:00:52 - LMT 1918 # # Shanks gives 1911-05-26 for the transition to WAT, # evidently confusing the date of the Portuguese decree -# http://dre.pt/pdf1sdip/1911/05/12500/23132313.pdf +# https://dre.pt/pdf1sdip/1911/05/12500/23132313.pdf # with the date that it took effect, namely 1912-01-01. # # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Africa/Bissau -1:02:20 - LMT 1912 Jan 1 - -1:00 - WAT 1975 + -1:00 - -01 1975 0:00 - GMT # Kenya # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Africa/Nairobi 2:27:16 - LMT 1928 Jul 3:00 - EAT 1930 - 2:30 - BEAT 1940 - 2:45 - BEAUT 1960 + 2:30 - +0230 1940 + 2:45 - +0245 1960 3:00 - EAT Link Africa/Nairobi Africa/Addis_Ababa # Ethiopia Link Africa/Nairobi Africa/Asmara # Eritrea @@ -437,7 +431,7 @@ Link Africa/Nairobi Indian/Mayotte # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Africa/Monrovia -0:43:08 - LMT 1882 -0:43:08 - MMT 1919 Mar # Monrovia Mean Time - -0:44:30 - LRT 1972 May # Liberia Time + -0:44:30 - -004430 1972 May 0:00 - GMT ############################################################################### @@ -596,7 +590,7 @@ Rule Mauritius 2008 only - Oct lastSun 2:00 1:00 S Rule Mauritius 2009 only - Mar lastSun 2:00 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Indian/Mauritius 3:50:00 - LMT 1907 # Port Louis - 4:00 Mauritius MU%sT # Mauritius Time + 4:00 Mauritius +04/+05 # Agalega Is, Rodriguez # no information; probably like Indian/Mauritius @@ -915,14 +909,14 @@ Zone Africa/Casablanca -0:30:20 - LMT 1913 Oct 26 # since most of it was then controlled by Morocco. Zone Africa/El_Aaiun -0:52:48 - LMT 1934 Jan # El Aaiún - -1:00 - WAT 1976 Apr 14 + -1:00 - -01 1976 Apr 14 0:00 Morocco WE%sT # Mozambique # # Shanks gives 1903-03-01 for the transition to CAT. # Perhaps the 1911-05-26 Portuguese decree -# http://dre.pt/pdf1sdip/1911/05/12500/23132313.pdf +# https://dre.pt/pdf1sdip/1911/05/12500/23132313.pdf # merely made it official? # # Zone NAME GMTOFF RULES FORMAT [UNTIL] @@ -958,7 +952,7 @@ Rule Namibia 1994 max - Sep Sun>=1 2:00 1:00 S Rule Namibia 1995 max - Apr Sun>=1 2:00 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Africa/Windhoek 1:08:24 - LMT 1892 Feb 8 - 1:30 - SWAT 1903 Mar # SW Africa Time + 1:30 - +0130 1903 Mar 2:00 - SAST 1942 Sep 20 2:00 2:00 1:00 SAST 1943 Mar 21 2:00 2:00 - SAST 1990 Mar 21 # independence @@ -985,7 +979,7 @@ Link Africa/Lagos Africa/Porto-Novo # Benin # Réunion # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Indian/Reunion 3:41:52 - LMT 1911 Jun # Saint-Denis - 4:00 - RET # Réunion Time + 4:00 - +04 # # Crozet Islands also observes Réunion time; see the 'antarctica' file. # @@ -1020,7 +1014,7 @@ Zone Indian/Reunion 3:41:52 - LMT 1911 Jun # Saint-Denis # Seychelles # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Indian/Mahe 3:41:48 - LMT 1906 Jun # Victoria - 4:00 - SCT # Seychelles Time + 4:00 - +04 # From Paul Eggert (2001-05-30): # Aldabra, Farquhar, and Desroches, originally dependencies of the # Seychelles, were transferred to the British Indian Ocean Territory diff --git a/backzone b/backzone index 4a5085f..119584a 100644 --- a/backzone +++ b/backzone @@ -65,7 +65,7 @@ Link Africa/Asmara Africa/Asmera # Mali (southern) Zone Africa/Bamako -0:32:00 - LMT 1912 0:00 - GMT 1934 Feb 26 - -1:00 - WAT 1960 Jun 20 + -1:00 - -01 1960 Jun 20 0:00 - GMT # Central African Republic @@ -75,7 +75,7 @@ Zone Africa/Bangui 1:14:20 - LMT 1912 # Gambia Zone Africa/Banjul -1:06:36 - LMT 1912 -1:06:36 - BMT 1935 # Banjul Mean Time - -1:00 - WAT 1964 + -1:00 - -01 1964 0:00 - GMT # Malawi @@ -93,18 +93,18 @@ Zone Africa/Bujumbura 1:57:28 - LMT 1890 # Guinea Zone Africa/Conakry -0:54:52 - LMT 1912 0:00 - GMT 1934 Feb 26 - -1:00 - WAT 1960 + -1:00 - -01 1960 0:00 - GMT # Senegal Zone Africa/Dakar -1:09:44 - LMT 1912 - -1:00 - WAT 1941 Jun + -1:00 - -01 1941 Jun 0:00 - GMT # Tanzania Zone Africa/Dar_es_Salaam 2:37:08 - LMT 1931 3:00 - EAT 1948 - 2:45 - BEAUT 1961 + 2:45 - +0245 1961 3:00 - EAT # Djibouti @@ -122,9 +122,9 @@ Zone Africa/Douala 0:38:48 - LMT 1912 # The International Hydrographic Bulletin, 1932-33, p 63 says that # Sierra Leone would advance its clocks by 20 minutes on 1933-10-01. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S -Rule SL 1935 1942 - Jun 1 0:00 0:40 SLST -Rule SL 1935 1942 - Oct 1 0:00 0 WAT -Rule SL 1957 1962 - Jun 1 0:00 1:00 SLST +Rule SL 1935 1942 - Jun 1 0:00 0:40 -0020 +Rule SL 1935 1942 - Oct 1 0:00 0 -01 +Rule SL 1957 1962 - Jun 1 0:00 1:00 +01 Rule SL 1957 1962 - Sep 1 0:00 0 GMT Zone Africa/Freetown -0:53:00 - LMT 1882 -0:53:00 - FMT 1913 Jun # Freetown Mean Time @@ -153,8 +153,8 @@ Zone Africa/Juba 2:06:24 - LMT 1931 # Uganda Zone Africa/Kampala 2:09:40 - LMT 1928 Jul 3:00 - EAT 1930 - 2:30 - BEAT 1948 - 2:45 - BEAUT 1957 + 2:30 - +0230 1948 + 2:45 - +0245 1957 3:00 - EAT # Rwanda @@ -177,11 +177,11 @@ Zone Africa/Lome 0:04:52 - LMT 1893 # # Shanks gives 1911-05-26 for the transition to WAT, # evidently confusing the date of the Portuguese decree -# http://dre.pt/pdf1sdip/1911/05/12500/23132313.pdf +# https://dre.pt/pdf1sdip/1911/05/12500/23132313.pdf # with the date that it took effect, namely 1912-01-01. # Zone Africa/Luanda 0:52:56 - LMT 1892 - 0:52:04 - AOT 1912 Jan 1 # Angola Time + 0:52:04 - +005204 1912 Jan 1 1:00 - WAT # Democratic Republic of the Congo (east) @@ -216,19 +216,19 @@ Zone Africa/Mbabane 2:04:24 - LMT 1903 Mar # Somalia Zone Africa/Mogadishu 3:01:28 - LMT 1893 Nov 3:00 - EAT 1931 - 2:30 - BEAT 1957 + 2:30 - +0230 1957 3:00 - EAT # Niger Zone Africa/Niamey 0:08:28 - LMT 1912 - -1:00 - WAT 1934 Feb 26 + -1:00 - -01 1934 Feb 26 0:00 - GMT 1960 1:00 - WAT # Mauritania Zone Africa/Nouakchott -1:03:48 - LMT 1912 0:00 - GMT 1934 Feb 26 - -1:00 - WAT 1960 Nov 28 + -1:00 - -01 1960 Nov 28 0:00 - GMT # Burkina Faso @@ -264,19 +264,19 @@ Zone America/Antigua -4:07:12 - LMT 1912 Mar 2 # The name "Comodoro Rivadavia" exceeds the 14-byte POSIX limit. Zone America/Argentina/ComodRivadavia -4:30:00 - LMT 1894 Oct 31 -4:16:48 - CMT 1920 May - -4:00 - ART 1930 Dec - -4:00 Arg AR%sT 1969 Oct 5 - -3:00 Arg AR%sT 1991 Mar 3 - -4:00 - WART 1991 Oct 20 - -3:00 Arg AR%sT 1999 Oct 3 - -4:00 Arg AR%sT 2000 Mar 3 - -3:00 - ART 2004 Jun 1 - -4:00 - WART 2004 Jun 20 - -3:00 - ART + -4:00 - -04 1930 Dec + -4:00 Arg -04/-03 1969 Oct 5 + -3:00 Arg -03/-02 1991 Mar 3 + -4:00 - -04 1991 Oct 20 + -3:00 Arg -03/-02 1999 Oct 3 + -4:00 Arg -04/-03 2000 Mar 3 + -3:00 - -03 2004 Jun 1 + -4:00 - -04 2004 Jun 20 + -3:00 - -03 # Aruba Zone America/Aruba -4:40:24 - LMT 1912 Feb 12 # Oranjestad - -4:30 - ANT 1965 # Netherlands Antilles Time + -4:30 - -0430 1965 -4:00 - AST # Cayman Is @@ -365,12 +365,12 @@ Zone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Cork Hill # Formosa (FM), La Pampa (LP), Chubut (CH) Zone America/Rosario -4:02:40 - LMT 1894 Nov -4:16:44 - CMT 1920 May - -4:00 - ART 1930 Dec - -4:00 Arg AR%sT 1969 Oct 5 - -3:00 Arg AR%sT 1991 Jul - -3:00 - ART 1999 Oct 3 0:00 - -4:00 Arg AR%sT 2000 Mar 3 0:00 - -3:00 - ART + -4:00 - -04 1930 Dec + -4:00 Arg -04/-03 1969 Oct 5 + -3:00 Arg -03/-02 1991 Jul + -3:00 - -03 1999 Oct 3 0:00 + -4:00 Arg -04/-03 2000 Mar 3 0:00 + -3:00 - -03 # St Kitts-Nevis Zone America/St_Kitts -4:10:52 - LMT 1912 Mar 2 # Basseterre @@ -403,12 +403,12 @@ Link Antarctica/McMurdo Antarctica/South_Pole # Milne says 2:59:54 was the meridian of the saluting battery at Aden, # and that Yemen was at 1:55:56, the meridian of the Hagia Sophia. Zone Asia/Aden 2:59:54 - LMT 1950 - 3:00 - AST + 3:00 - +03 # Bahrain Zone Asia/Bahrain 3:22:20 - LMT 1920 # Manamah - 4:00 - GST 1972 Jun - 3:00 - AST + 4:00 - +04 1972 Jun + 3:00 - +03 # India # @@ -431,7 +431,7 @@ Zone Asia/Bahrain 3:22:20 - LMT 1920 # Manamah # counties Deqing, Enping, Kaiping, Luoding, Taishan, Xinxing, # Yangchun, Yangjiang, Yu'nan, and Yunfu. Zone Asia/Chongqing 7:06:20 - LMT 1928 # or Chungking - 7:00 - LONT 1980 May # Long-shu Time + 7:00 - +07 1980 May 8:00 PRC C%sT Link Asia/Chongqing Asia/Chungking @@ -442,43 +442,43 @@ Link Asia/Chongqing Asia/Chungking # October 1954, with exact date and time unspecified. Zone Asia/Hanoi 7:03:24 - LMT 1906 Jul 1 7:06:30 - PLMT 1911 May 1 - 7:00 - ICT 1942 Dec 31 23:00 - 8:00 - IDT 1945 Mar 14 23:00 - 9:00 - JST 1945 Sep 2 - 7:00 - ICT 1947 Apr 1 - 8:00 - IDT 1954 Oct - 7:00 - ICT + 7:00 - +07 1942 Dec 31 23:00 + 8:00 - +08 1945 Mar 14 23:00 + 9:00 - +09 1945 Sep 2 + 7:00 - +07 1947 Apr 1 + 8:00 - +08 1954 Oct + 7:00 - +07 # China # Changbai Time ("Long-white Time", Long-white = Heilongjiang area) # Heilongjiang (except Mohe county), Jilin Zone Asia/Harbin 8:26:44 - LMT 1928 # or Haerbin - 8:30 - CHAT 1932 Mar # Changbai Time + 8:30 - +0830 1932 Mar 8:00 - CST 1940 - 9:00 - CHAT 1966 May - 8:30 - CHAT 1980 May + 9:00 - +09 1966 May + 8:30 - +0830 1980 May 8:00 PRC C%sT # far west China Zone Asia/Kashgar 5:03:56 - LMT 1928 # or Kashi or Kaxgar - 5:30 - KAST 1940 # Kashgar Time - 5:00 - KAST 1980 May + 5:30 - +0530 1940 + 5:00 - +05 1980 May 8:00 PRC C%sT # Kuwait Zone Asia/Kuwait 3:11:56 - LMT 1950 - 3:00 - AST + 3:00 - +03 # Oman # Milne says 3:54:24 was the meridian of the Muscat Tidal Observatory. Zone Asia/Muscat 3:54:24 - LMT 1920 - 4:00 - GST + 4:00 - +04 # India # From Paul Eggert (2014-08-11), after a heads-up from Stephen Colebourne: # According to a Portuguese decree (1911-05-26) -# http://dre.pt/pdf1sdip/1911/05/12500/23132313.pdf +# https://dre.pt/pdf1sdip/1911/05/12500/23132313.pdf # Portuguese India switched to UT +05 on 1912-01-01. #Zone Asia/Panaji [not enough info to complete] @@ -491,12 +491,12 @@ Zone Asia/Muscat 3:54:24 - LMT 1920 # transitions there. Zone Asia/Phnom_Penh 6:59:40 - LMT 1906 Jul 1 7:06:30 - PLMT 1911 May 1 - 7:00 - ICT 1942 Dec 31 23:00 - 8:00 - IDT 1945 Mar 14 23:00 - 9:00 - JST 1945 Sep 2 - 7:00 - ICT 1947 Apr 1 - 8:00 - IDT 1953 Nov 9 - 7:00 - ICT + 7:00 - +07 1942 Dec 31 23:00 + 8:00 - +08 1945 Mar 14 23:00 + 9:00 - +09 1945 Sep 2 + 7:00 - +07 1947 Apr 1 + 8:00 - +08 1953 Nov 9 + 7:00 - +07 # Israel Zone Asia/Tel_Aviv 2:19:04 - LMT 1880 @@ -511,16 +511,16 @@ Zone Asia/Tel_Aviv 2:19:04 - LMT 1880 # this is probably wrong but it's better than guessing no transition. Zone Asia/Vientiane 6:50:24 - LMT 1906 Jul 1 7:06:30 - PLMT 1911 May 1 - 7:00 - ICT 1942 Dec 31 23:00 - 8:00 - IDT 1945 Mar 14 23:00 - 9:00 - JST 1945 Sep 2 - 7:00 - ICT 1947 Apr 1 - 8:00 - IDT 1955 Apr 15 - 7:00 - ICT + 7:00 - +07 1942 Dec 31 23:00 + 8:00 - +08 1945 Mar 14 23:00 + 9:00 - +09 1945 Sep 2 + 7:00 - +07 1947 Apr 1 + 8:00 - +08 1955 Apr 15 + 7:00 - +07 # Jan Mayen # From Whitman: -Zone Atlantic/Jan_Mayen -1:00 - EGT +Zone Atlantic/Jan_Mayen -1:00 - -01 # St Helena Zone Atlantic/St_Helena -0:22:48 - LMT 1890 # Jamestown @@ -663,15 +663,13 @@ Zone Pacific/Johnston -10:00 - HST # " 3:00P Ar. MIDWAY ISLAND . . . . . . . . . M.L.T. Lv. 6:00A " # Zone Pacific/Midway -11:49:28 - LMT 1901 - -11:00 - NST 1956 Jun 3 - -11:00 1:00 NDT 1956 Sep 2 - -11:00 - NST 1967 Apr # N=Nome - -11:00 - BST 1983 Nov 30 # B=Bering - -11:00 - SST # S=Samoa + -11:00 - -11 1956 Jun 3 + -11:00 1:00 -10 1956 Sep 2 + -11:00 - -11 # N Mariana Is Zone Pacific/Saipan -14:17:00 - LMT 1844 Dec 31 9:43:00 - LMT 1901 - 9:00 - MPT 1969 Oct # N Mariana Is Time - 10:00 - MPT 2000 Dec 23 + 9:00 - +09 1969 Oct + 10:00 - +10 2000 Dec 23 10:00 - ChST # Chamorro Standard Time -- 2.9.3

1 6