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Re: [tz] [PATCH] New file time.tab, superseding zone.tab
by Tobias Conradi July 20, 2014

July 20, 2014

This message seems list related but what only send to me. Maybe it is of interest to others, as it gives insights into how Paul Eggert is managing the list. On Sun, Jul 20, 2014 at 4:12 AM, Paul Eggert <eggert(a)cs.ucla.edu> wrote: > Tobias Conradi wrote: >> >> Paul Eggert controls ids, removes >> them, repurposes them as he likes. > > > I'm going to ask you again, privately, to stop making personal comments like > that. This sort of thing out of place in this mailing list. If you can't > refrain from putting personal comments into your email, then you should not > be sending email to the list. -- Tobias Conradi Rheinsberger Str. 18 10115 Berlin Germany http://tobiasconradi.com

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[PATCH] * europe, NEWS: Give proper credit to George Vernon Hudson
by Paul Eggert July 19, 2014

July 19, 2014

as the inventor of DST. --- NEWS | 2 ++ europe | 20 +++++++++++++++++--- 2 files changed, 19 insertions(+), 3 deletions(-) diff --git a/NEWS b/NEWS index babfdac..1845ee8 100644 --- a/NEWS +++ b/NEWS @@ -186,6 +186,8 @@ Unreleased, experimental changes There is new commentary about time in Poland in 1919. + Proper credit has been given to DST inventor George Vernon Hudson. + Commentary about time in Metlakatla, AK and Resolute, NU has been improved, with a new source for the former. diff --git a/europe b/europe index 2ba3493..e87cc21 100644 --- a/europe +++ b/europe @@ -137,8 +137,22 @@ # transition date for London, namely 1847-12-01. We don't know as much # about Dublin, so we use 1880-08-02, the legal transition time. -# From Paul Eggert (2003-09-27): -# Summer Time was first seriously proposed by William Willett (1857-1915), +# From Paul Eggert (2014-07-19): +# The ancients had no need for daylight saving, as they kept time +# informally or via hours whose length depended on the time of year. +# Daylight saving time in its modern sense was invented by the +# New Zealand entomologist George Vernon Hudson (1867-1946), +# whose day job as a postal clerk led him to value +# after-hours daylight in which to pursue his research. +# In 1895 he presented a paper to the Wellington Philosophical Society +# that proposed a two-hour daylight-saving shift. See: +# Hudson GV. On seasonal time-adjustment in countries south of lat. 30 deg. +# Transactions and Proceedings of the New Zealand Institute. 1895;28:734 +# http://rsnz.natlib.govt.nz/volume/rsnz_28/rsnz_28_00_006110.html +# Although some interest was expressed in New Zealand, his proposal +# did not find its way into law and eventually it was almost forgotton. +# +# In England, DST was independently reinvented by William Willett (1857-1915), # a London builder and member of the Royal Astronomical Society # who circulated a pamphlet "The Waste of Daylight" (1907) # that proposed advancing clocks 20 minutes on each of four Sundays in April, @@ -151,7 +165,7 @@ # A monument to Willett was unveiled on 1927-05-21, in an open space in # a 45-acre wood near Chislehurst, Kent that was purchased by popular # subscription and open to the public. On the south face of the monolith, -# designed by G. W. Miller, is the...William Willett Memorial Sundial, +# designed by G. W. Miller, is the William Willett Memorial Sundial, # which is permanently set to Summer Time. # From Winston Churchill (1934-04-28): -- 1.9.1

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WG Review: Time Zone Data Distribution Service (tzdist)
by The IESG July 18, 2014

July 18, 2014

A new IETF working group has been proposed in the Applications Area. The IESG has not made any determination yet. The following draft charter was submitted, and is provided for informational purposes only. Please send your comments to the IESG mailing list (iesg at ietf.org) by 2014-07-28. Time Zone Data Distribution Service (tzdist) ------------------------------------------------ Current Status: Proposed WG Assigned Area Director: Barry Leiba <barryleiba(a)computer.org> Mailing list Address: tzdist(a)ietf.org To Subscribe: https://www.ietf.org/mailman/listinfo/tzdist Archive: http://www.ietf.org/mail-archive/web/tzdist/ Charter: Time Zone Data Distribution Service (tzdist) ----------------------------------------------------------- A time zone is a region that has a uniform local time for legal, commercial, and social purposes, with some regions using daylight saving time (DST) rules for part of the year. A local time is defined as a standard offset from Coordinated Universal Time (UTC), and a set of DST rules. Time zone data represents the history, current, and future local time rules for these regions, together with an associated time zone identifier. Time zone data is a critical element of computer systems and devices that make use of local time. In particular, it is critical to any calendaring and scheduling system, such as iCalendar (RFC 5545). Daylight saving time rules, which affect local UTC offsets, can change - sometimes at very short notice (just a few days) - as those rules are typically defined by political processes. Currently, there is no efficient, fast way to ensure that time zone data is updated in a timely and reliable manner on devices that need it. Time zone changes are often delivered as operating system updates, and are thus tied to release schedules that can trail the actual time zone changes by a significant period of time. A service is needed that can provide timely, reliable updates. One added benefit of such a service for iCalendar is the ability for calendaring clients and servers to agree on common, standard definitions of time zone data, removing the need to pass time zone data directly "by value" in iCalendar data. By allowing clients and servers to use time zones "by reference" significant network bandwidth and storage savings can be achieved. This working group will: - Define a time zone data distribution protocol that allows for efficient, timely updates of time zone data to be delivered to clients. This protocol must scale to vast numbers of clients, such as the potential "internet of things" devices, as well as to today's desktop computers and servers. - Define an extension to CalDAV (RFC 4791) to allow clients and servers to use time zones "by reference" to improve the efficiency of the overall protocol. The working group will use the following drafts as initial input for its work: draft-douglass-timezone-service-11 draft-daboo-caldav-timezone-ref-01 The working group will work under the following parameters: - The time zone data distribution protocol will initially be targeted at iCalendar-based clients, but should be flexible enough to deliver time zone data in other formats. - The time zone data will be based on the Time Zone Database (http://www.iana.org/time-zones) but must be able to include any source of time zone data. - The time zone data distribution protocol should also offer an API to allow thin clients to easily make use of time zone data by querying for UTC offsets, offloading the sometimes complex work of expanding recurrence rules to the service. This API should be extensible to support other types of time zone operations in the future. - The time zone data distribution protocol will use current security protocols to protect the integrity and confidentiality of the data as it is distributed, and may also address these issues with respect to retrieval of data from its original source (such as the Time Zone Database). Even public time zone data can represent a significant privacy exposure when it is associated with the user or endpoint that is retrieving it. The following are Out of scope for the working group: - Any changes to the Time Zone Database process or infrastructure, as documented in RFC 6557. However, the WG may work with IANA in order to make integrity checking information, such as public keys, readily accessible for protocol use. - The naming process for time zone identifiers. The working group can consider adding a mechanism, such as a "namespace" prefix, to differentiate different time zone sources, but the nature of the time zone identifiers used will be controlled by the sources themselves. - Lookup protocols or APIs to map a location to a time zone. Milestones: TBD

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[PATCH] Be a bit more consistent about Metlakatla and Resolute abbr and comments.
by Paul Eggert July 18, 2014

July 18, 2014

* northamerica (America/Metlakatla): Use the more-common "PST" rather than our invented "MeST" for the abbreviation. Our source called it "Pacific Time", as did a contemporaneous news report, and I couldn't find contemporaneous use of "MeST" or of "Metlakatla Time". Cite the news report in the commentary, and quote some Juneau graffiti. * zone.tab (America/Resolute): Call it Central Time, not Central Standard Time, since it observes DST now. (America/Metlakatla): Call it Pacific Standard Time, not Metlakatla Time. Mention that it's in Alaska. * NEWS: Document the above. --- NEWS | 5 +++++ northamerica | 17 +++++++++++------ zone.tab | 4 ++-- 3 files changed, 18 insertions(+), 8 deletions(-) diff --git a/NEWS b/NEWS index f77fe86..ffcbd92 100644 --- a/NEWS +++ b/NEWS @@ -46,6 +46,8 @@ Unreleased, experimental changes Prefix "W" to (western) Samoa time when its standard-time offset disagrees with that of American Samoa. + America/Metlakatla now uses PST, not MeST, to abbreviate its time zone. + Time zone abbreviations have been updated for Japan's two time zones used 1896-1937. JWST now stands for Western Standard Time, and JCST for Central Standard Time (formerly this was CJT). @@ -173,6 +175,9 @@ Unreleased, experimental changes There is new commentary about time in Poland in 1919. + Commentary about time in Metlakatla, AK and Resolute, NU has been + improved, with a new source for the former. + In zone.tab, Pacific/Easter no longer mentions Salas y Gómez, as it is uninhabited. diff --git a/northamerica b/northamerica index c461ef4..1b6bb23 100644 --- a/northamerica +++ b/northamerica @@ -421,13 +421,18 @@ Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02 # was destroyed in 1805 by a Yakutat-kon war party.) However, there # were nearby inhabitants in some cases and for our purposes perhaps # it's best to simply use the official transition. -# -# From Steve Ferguson (2011-01-31): -# The author lives in Alaska and many of the references listed are only -# available to Alaskan residents. +# From Paul Eggert (2014-07-18): +# One opinion of the early-1980s turmoil in Alaska over time zones and +# daylight saving time appeared as graffiti on a Juneau airport wall: +# "Welcome to Juneau. Please turn your watch back to the 19th century." +# See: Turner W. Alaska's four time zones now two. NY Times 1983-11-01. +# http://www.nytimes.com/1983/11/01/us/alaska-s-four-time-zones-now-two.html # -# http://www.alaskahistoricalsociety.org/index.cfm?section=discover%20alaska&… +# Steve Ferguson (2011-01-31) referred to the following source: +# Norris F. Keeping time in Alaska: national directives, local response. +# Alaska History 2001;16(1-2). +# http://alaskahistoricalsociety.org/discover-alaska/glimpses-of-the-past/kee… # From Arthur David Olson (2011-02-01): # Here's database-relevant material from the 2001 "Alaska History" article: @@ -489,7 +494,7 @@ Zone America/Metlakatla 15:13:42 - LMT 1867 Oct 18 -8:00 US P%sT 1946 -8:00 - PST 1969 -8:00 US P%sT 1983 Oct 30 2:00 - -8:00 - MeST + -8:00 - PST Zone America/Yakutat 14:41:05 - LMT 1867 Oct 18 -9:18:55 - LMT 1900 Aug 20 12:00 -9:00 - YST 1942 diff --git a/zone.tab b/zone.tab index e29778c..e415ca6 100644 --- a/zone.tab +++ b/zone.tab @@ -128,7 +128,7 @@ CA +4901-08816 America/Nipigon Eastern Time - Ontario & Quebec - places that did CA +4823-08915 America/Thunder_Bay Eastern Time - Thunder Bay, Ontario CA +6344-06828 America/Iqaluit Eastern Time - east Nunavut - most locations CA +6608-06544 America/Pangnirtung Eastern Time - Pangnirtung, Nunavut -CA +744144-0944945 America/Resolute Central Standard Time - Resolute, Nunavut +CA +744144-0944945 America/Resolute Central Time - Resolute, Nunavut CA +484531-0913718 America/Atikokan Eastern Standard Time - Atikokan, Ontario and Southampton I, Nunavut CA +624900-0920459 America/Rankin_Inlet Central Time - central Nunavut CA +4953-09709 America/Winnipeg Central Time - Manitoba & west Ontario @@ -433,7 +433,7 @@ US +571035-1351807 America/Sitka Alaska Time - southeast Alaska panhandle US +593249-1394338 America/Yakutat Alaska Time - Alaska panhandle neck US +643004-1652423 America/Nome Alaska Time - west Alaska US +515248-1763929 America/Adak Aleutian Islands -US +550737-1313435 America/Metlakatla Metlakatla Time - Annette Island +US +550737-1313435 America/Metlakatla Pacific Standard Time - Annette Island, Alaska US +211825-1575130 Pacific/Honolulu Hawaii UY -3453-05611 America/Montevideo UZ +3940+06648 Asia/Samarkand west Uzbekistan -- 1.9.1

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A rollup tz release would be helpful
by Andy Heninger July 18, 2014

July 18, 2014

There have been a pretty substantial number of refactoring and cleanup changes to the experimental tz repository over the last month, and things now seem to be settling down. Speaking as the person who does a fair amount of the integration of tz releases into Google, I would definitely find it helpful to have an official release that includes these changes happen sooner rather than later. Past experience suggests that there may be a few internal glitches to be sorted through, and I would far prefer to handle them now, while not under pressure to get some low-lead-time rule change deployed in a hurry. We only deploy official tz releases, not informal repository snapshots. Thanks, -- Andy

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Mapping lat/lon to timezones, in Go
by Dirkjan Ochtman July 16, 2014

July 16, 2014

This might be interesting for people on this list: https://plus.google.com/u/0/+BradFitzpatrick/posts/XVyy1bAzkZd Cheers, Dirkjan

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[PATCH] Replace Africa zones with links when that doesn't lose useful info.
by Paul Eggert July 16, 2014

July 16, 2014

* africa (Africa/Luanda, Africa/Porto-Novo, Africa/Gaborone) (Africa/Ouagadougou, Africa/Bujumbura, Africa/Douala, Africa/Bangui) (Indian/Comoro, Africa/Kinshasa, Africa/Lubumbashi, Africa/Brazzaville) (Africa/Djibouti, Africa/Malabo, Africa/Asmara, Africa/Addis_Ababa) (Africa/Libreville, Africa/Banjul, Africa/Accra, Africa/Conakry) (Africa/Maseru, Indian/Antananarivo, Africa/Blantyre, Africa/Bamako) (Africa/Nouakchott, Indian/Mayotte, Africa/Maputo, Africa/Niamey) (Africa/Kigali, Atlantic/St_Helena, Africa/Sao_Tome, Africa/Dakar) (Africa/Freetown, Africa/Mogadishu, Africa/Mbabane, Africa/Dar_es_Salaam) (Africa/Lome, Africa/Kampala, Africa/Lusaka, Africa/Harare): * antarctica (Antarctica/Syowa): Remove zone, replacing each with a link to a region that has had the same UTC offset since 1970. * NEWS: Document this. --- NEWS | 20 +++-- africa | 266 ++++++++++++++++++++----------------------------------------- antarctica | 5 +- 3 files changed, 104 insertions(+), 187 deletions(-) diff --git a/NEWS b/NEWS index 222f91e..429b89e 100644 --- a/NEWS +++ b/NEWS @@ -61,11 +61,21 @@ Unreleased, experimental changes Some zones have been turned into links, when they differed from existing zones only for older UTC offsets where the data were likely invented. These changes affect UTC offsets in pre-1970 time stamps only. This is - similar to the change in release 2013e, except this time for the Pacific. - The affected zones are: Antarctica/DumontDUrville, Pacific/Chuuk, - Pacific/Funafuti, Pacific/Majuro, Pacific/Midway, Pacific/Palau, - Pacific/Pohnpei, Pacific/Saipan, Pacific/Tahiti, Pacific/Wake, and - Pacific/Wallis. + similar to the change in release 2013e, except this time for Africa and + the Pacific. The affected zones are: Africa/Accra, Africa/Addis_Ababa, + Africa/Asmara, Africa/Bamako, Africa/Bangui, Africa/Banjul, + Africa/Blantyre, Africa/Brazzaville, Africa/Bujumbura, Africa/Conakry, + Africa/Dakar, Africa/Dar_es_Salaam, Africa/Djibouti, Africa/Douala, + Africa/Freetown, Africa/Gaborone, Africa/Harare, Africa/Kampala, + Africa/Kigali, Africa/Kinshasa, Africa/Libreville, Africa/Lome, + Africa/Luanda, Africa/Lubumbashi, Africa/Lusaka, Africa/Malabo, + Africa/Maputo, Africa/Maseru, Africa/Mbabane, Africa/Mogadishu, + Africa/Niamey, Africa/Nouakchott, Africa/Ouagadougou, Africa/Porto-Novo, + Africa/Sao_Tome, Antarctica/DumontDUrville, Antarctica/Syowa, + Atlantic/St_Helena, Indian/Antananarivo, Indian/Comoro, Indian/Mayotte, + Pacific/Chuuk, Pacific/Funafuti, Pacific/Majuro, Pacific/Midway, + Pacific/Palau, Pacific/Pohnpei, Pacific/Saipan, Pacific/Tahiti, + Pacific/Wake, and Pacific/Wallis. Asia/Shanghai's pre-standard-time UT offset has been changed from 8:05:57 to 8:05:43, the location of Xujiahui Observatory. Its diff --git a/africa b/africa index 3d84d9b..678cde2 100644 --- a/africa +++ b/africa @@ -64,7 +64,6 @@ # 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 -# 4:00 EAST East Africa Summer Time (no longer used) # Algeria # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S @@ -105,45 +104,21 @@ Zone Africa/Algiers 0:12:12 - LMT 1891 Mar 15 0:01 1:00 - CET # Angola -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Africa/Luanda 0:52:56 - LMT 1892 - 0:52:04 - AOT 1911 May 26 # Angola Time - 1:00 - WAT - # Benin -# Whitman says they switched to 1:00 in 1946, not 1934; -# go with Shanks & Pottenger. -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Africa/Porto-Novo 0:10:28 - LMT 1912 - 0:00 - GMT 1934 Feb 26 - 1:00 - WAT +# See Africa/Lagos. # Botswana -# From Paul Eggert (2013-02-21): -# Milne says they were regulated by the Cape Town Signal in 1899; -# assume they switched to 2:00 when Cape Town did. -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Africa/Gaborone 1:43:40 - LMT 1885 - 1:30 - SAST 1903 Mar - 2:00 - CAT 1943 Sep 19 2:00 - 2:00 1:00 CAST 1944 Mar 19 2:00 - 2:00 - CAT +# Milne says they were regulated by the Cape Town Signal in 1899. +# See Africa/Johannesburg. # Burkina Faso -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Africa/Ouagadougou -0:06:04 - LMT 1912 - 0:00 - GMT +# See Africa/Abidjan. # Burundi -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Africa/Bujumbura 1:57:28 - LMT 1890 - 2:00 - CAT +# See Africa/Johannesburg. # Cameroon -# Whitman says they switched to 1:00 in 1920; go with Shanks & Pottenger. -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Africa/Douala 0:38:48 - LMT 1912 - 1:00 - WAT +# See Africa/Lagos. # Cape Verde # Zone NAME GMTOFF RULES FORMAT [UNTIL] @@ -154,9 +129,7 @@ Zone Atlantic/Cape_Verde -1:34:04 - LMT 1907 # Praia -1:00 - CVT # Central African Republic -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Africa/Bangui 1:14:20 - LMT 1912 - 1:00 - WAT +# See Africa/Lagos. # Chad # Zone NAME GMTOFF RULES FORMAT [UNTIL] @@ -166,31 +139,33 @@ Zone Africa/Ndjamena 1:00:12 - LMT 1912 # N'Djamena 1:00 - WAT # Comoros -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Indian/Comoro 2:53:04 - LMT 1911 Jul # Moroni, Gran Comoro - 3:00 - EAT +# See Africa/Nairobi. # Democratic Republic of Congo -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Africa/Kinshasa 1:01:12 - LMT 1897 Nov 9 - 1:00 - WAT -Zone Africa/Lubumbashi 1:49:52 - LMT 1897 Nov 9 - 2:00 - CAT +# See Africa/Lagos for the western part of the country. +# See Africa/Johannesburg for the eastern part of the country. # Republic of the Congo -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Africa/Brazzaville 1:01:08 - LMT 1912 - 1:00 - WAT +# See Africa/Lagos. # Côte D'Ivoire / Ivory Coast # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Africa/Abidjan -0:16:08 - LMT 1912 0:00 - GMT +Link Africa/Abidjan Africa/Accra # Ghana +Link Africa/Abidjan Africa/Bamako # Mali +Link Africa/Abidjan Africa/Banjul # Gambia +Link Africa/Abidjan Africa/Conakry # Guinea +Link Africa/Abidjan Africa/Dakar # Senegal +Link Africa/Abidjan Africa/Freetown # Sierra Leone +Link Africa/Abidjan Africa/Lome # Togo +Link Africa/Abidjan Africa/Nouakchott # Mauritania +Link Africa/Abidjan Africa/Ouagadougou # Burkina Faso +Link Africa/Abidjan Africa/Sao_Tome # São Tomé and Príncipe +Link Africa/Abidjan Atlantic/St_Helena # St Helena # Djibouti -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Africa/Djibouti 2:52:36 - LMT 1911 Jul - 3:00 - EAT +# See Africa/Nairobi. ############################################################################### @@ -400,56 +375,32 @@ Zone Africa/Cairo 2:05:09 - LMT 1900 Oct 2:00 Egypt EE%sT # Equatorial Guinea -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Africa/Malabo 0:35:08 - LMT 1912 - 0:00 - GMT 1963 Dec 15 - 1:00 - WAT +# See Africa/Lagos. # Eritrea -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Africa/Asmara 2:35:32 - LMT 1870 - 2:35:32 - AMT 1890 # Asmara Mean Time - 2:35:20 - ADMT 1936 May 5 # Adis Dera MT - 3:00 - EAT +# See Africa/Nairobi. # Ethiopia -# From Paul Eggert (2006-03-22): -# Shanks & Pottenger write that Ethiopia had six narrowly-spaced time zones -# between 1870 and 1890, and that they merged to 38E50 (2:35:20) in 1890. -# We'll guess that 38E50 is for Adis Dera. -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Africa/Addis_Ababa 2:34:48 - LMT 1870 - 2:35:20 - ADMT 1936 May 5 # Adis Dera MT - 3:00 - EAT +# From Paul Eggert (2014-07-09): +# Like the Swahili of Kenya and Tanzania, many Ethiopians keep a +# 12-hour clock starting at our 06:00, so their "8 o'clock" is our +# 02:00 or 14:00. Keep this in mind when you ask the time in Amharic. +# +# Shanks & Pottenger write that Ethiopia had six narrowly-spaced time +# zones between 1870 and 1890, that they merged to 38E50 (2:35:20) in +# 1890, and that they switched to 3:00 on 1936-05-05. Perhaps 38E50 +# was for Adis Dera. Ignore this for now as it predates our 1970 +# cutoff, and it's quite likely wrong anyway. +# +# See Africa/Nairobi. # Gabon -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Africa/Libreville 0:37:48 - LMT 1912 - 1:00 - WAT +# See Africa/Lagos. # Gambia -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Africa/Banjul -1:06:36 - LMT 1912 - -1:06:36 - BMT 1935 # Banjul Mean Time - -1:00 - WAT 1964 - 0:00 - GMT - # Ghana -# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S -# Whitman says DST was observed from 1931 to "the present"; -# go with Shanks & Pottenger. -Rule Ghana 1936 1942 - Sep 1 0:00 0:20 GHST -Rule Ghana 1936 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 - # Guinea -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Africa/Conakry -0:54:52 - LMT 1912 - 0:00 - GMT 1934 Feb 26 - -1:00 - WAT 1960 - 0:00 - GMT +# See Africa/Abidjan. # Guinea-Bissau # Zone NAME GMTOFF RULES FORMAT [UNTIL] @@ -464,13 +415,19 @@ Zone Africa/Nairobi 2:27:16 - LMT 1928 Jul 2:30 - BEAT 1940 2:45 - BEAUT 1960 3:00 - EAT +Link Africa/Nairobi Africa/Addis_Ababa # Ethiopia +Link Africa/Nairobi Africa/Asmara # Eritrea +Link Africa/Nairobi Africa/Dar_es_Salaam # Tanzania +Link Africa/Nairobi Africa/Djibouti +Link Africa/Nairobi Africa/Kampala # Uganda +Link Africa/Nairobi Africa/Mogadishu # Somalia +Link Africa/Nairobi Antarctica/Syowa +Link Africa/Nairobi Indian/Antananarivo # Madagascar +Link Africa/Nairobi Indian/Comoro +Link Africa/Nairobi Indian/Mayotte # Lesotho -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Africa/Maseru 1:50:00 - LMT 1903 Mar - 2:00 - SAST 1943 Sep 19 2:00 - 2:00 1:00 SAST 1944 Mar 19 2:00 - 2:00 - SAST +# See Africa/Johannesburg. # Liberia # From Paul Eggert (2006-03-22): @@ -545,30 +502,14 @@ Zone Africa/Tripoli 0:52:44 - LMT 1920 2:00 - EET # Madagascar -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Indian/Antananarivo 3:10:04 - LMT 1911 Jul - 3:00 - EAT 1954 Feb 27 23:00s - 3:00 1:00 EAST 1954 May 29 23:00s - 3:00 - EAT +# See Africa/Nairobi. # Malawi -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Africa/Blantyre 2:20:00 - LMT 1903 Mar - 2:00 - CAT +# See Africa/Johannesburg. # Mali -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Africa/Bamako -0:32:00 - LMT 1912 - 0:00 - GMT 1934 Feb 26 - -1:00 - WAT 1960 Jun 20 - 0:00 - GMT - # Mauritania -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Africa/Nouakchott -1:03:48 - LMT 1912 - 0:00 - GMT 1934 Feb 26 - -1:00 - WAT 1960 Nov 28 - 0:00 - GMT +# See Africa/Abidjan. # Mauritius @@ -665,8 +606,7 @@ Zone Indian/Mauritius 3:50:00 - LMT 1907 # Port Louis # Mayotte # Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Indian/Mayotte 3:00:56 - LMT 1911 Jul # Mamoutzou - 3:00 - EAT +# See Africa/Nairobi. # Morocco # See the 'europe' file for Spanish Morocco (Africa/Ceuta). @@ -964,9 +904,7 @@ Zone Africa/El_Aaiun -0:52:48 - LMT 1934 Jan # El Aaiún 0:00 Morocco WE%sT # Mozambique -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Africa/Maputo 2:10:20 - LMT 1903 Mar - 2:00 - CAT +# See Africa/Johannesburg. # Namibia # The 1994-04-03 transition is from Shanks & Pottenger. @@ -998,16 +936,21 @@ Zone Africa/Windhoek 1:08:24 - LMT 1892 Feb 8 1:00 Namibia WA%sT # Niger -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Africa/Niamey 0:08:28 - LMT 1912 - -1:00 - WAT 1934 Feb 26 - 0:00 - GMT 1960 - 1:00 - WAT +# See Africa/Lagos. # Nigeria # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Africa/Lagos 0:13:36 - LMT 1919 Sep 1:00 - WAT +Link Africa/Lagos Africa/Bangui # Central African Republic +Link Africa/Lagos Africa/Brazzaville # Rep. of the Congo +Link Africa/Lagos Africa/Douala # Cameroon +Link Africa/Lagos Africa/Kinshasa # W Dem. Rep. of the Congo +Link Africa/Lagos Africa/Libreville # Gabon +Link Africa/Lagos Africa/Luanda # Angola +Link Africa/Lagos Africa/Malabo # Equatorial Guinea +Link Africa/Lagos Africa/Niamey # Niger +Link Africa/Lagos Africa/Porto-Novo # Benin # Réunion # Zone NAME GMTOFF RULES FORMAT [UNTIL] @@ -1028,16 +971,11 @@ Link Indian/Reunion Indian/Alfred_Faure # Tromelin - inhabited until at least 1958 # Rwanda -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Africa/Kigali 2:00:16 - LMT 1935 Jun - 2:00 - CAT +# See Africa/Johannesburg. # St Helena -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Atlantic/St_Helena -0:22:48 - LMT 1890 # Jamestown - -0:22:48 - JMT 1951 # Jamestown Mean Time - 0:00 - GMT -# The other parts of the St Helena territory are similar: +# See Africa/Abidjan. +# The parts of the St Helena territory are similar: # Tristan da Cunha: on GMT, say Whitman and the CIA # Ascension: on GMT, say the USNO (1995-12-21) and the CIA # Gough (scientific station since 1955; sealers wintered previously): @@ -1045,16 +983,8 @@ Zone Atlantic/St_Helena -0:22:48 - LMT 1890 # Jamestown # Inaccessible, Nightingale: uninhabited # São Tomé and Príncipe -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Africa/Sao_Tome 0:26:56 - LMT 1884 - -0:36:32 - LMT 1912 # Lisbon Mean Time - 0:00 - GMT - # Senegal -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Africa/Dakar -1:09:44 - LMT 1912 - -1:00 - WAT 1941 Jun - 0:00 - GMT +# See Africa/Abidjan. # Seychelles # Zone NAME GMTOFF RULES FORMAT [UNTIL] @@ -1068,24 +998,10 @@ Zone Indian/Mahe 3:41:48 - LMT 1906 Jun # Victoria # Possibly the islands were uninhabited. # Sierra Leone -# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S -# Whitman gives Mar 31 - Aug 31 for 1931 on; go with Shanks & Pottenger. -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 1957 1962 - Sep 1 0:00 0 GMT -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -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 +# See Africa/Abidjan. # Somalia -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Africa/Mogadishu 3:01:28 - LMT 1893 Nov - 3:00 - EAT 1931 - 2:30 - BEAT 1957 - 3:00 - EAT +# See Africa/Nairobi. # South Africa # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S @@ -1095,6 +1011,17 @@ Rule SA 1943 1944 - Mar Sun>=15 2:00 0 - Zone Africa/Johannesburg 1:52:00 - LMT 1892 Feb 8 1:30 - SAST 1903 Mar 2:00 SA SAST +Link Africa/Johannesburg Africa/Blantyre # Malawi +Link Africa/Johannesburg Africa/Bujumbura # Burundi +Link Africa/Johannesburg Africa/Gaborone # Botswana +Link Africa/Johannesburg Africa/Harare # Zimbabwe +Link Africa/Johannesburg Africa/Kigali # Rwanda +Link Africa/Johannesburg Africa/Lubumbashi # E Dem. Rep. of Congo +Link Africa/Johannesburg Africa/Lusaka # Zambia +Link Africa/Johannesburg Africa/Maputo # Mozambique +Link Africa/Johannesburg Africa/Maseru # Lesotho +Link Africa/Johannesburg Africa/Mbabane # Swaziland +# # Marion and Prince Edward Is # scientific station since 1947 # no information @@ -1122,21 +1049,13 @@ Zone Africa/Khartoum 2:10:08 - LMT 1931 Link Africa/Khartoum Africa/Juba # Swaziland -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Africa/Mbabane 2:04:24 - LMT 1903 Mar - 2:00 - SAST +# See Africa/Johannesburg. # Tanzania -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Africa/Dar_es_Salaam 2:37:08 - LMT 1931 - 3:00 - EAT 1948 - 2:45 - BEAUT 1961 - 3:00 - EAT +# See Africa/Nairobi. # Togo -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Africa/Lome 0:04:52 - LMT 1893 - 0:00 - GMT +# See Africa/Abidjan. # Tunisia @@ -1239,19 +1158,8 @@ Zone Africa/Tunis 0:40:44 - LMT 1881 May 12 1:00 Tunisia CE%sT # Uganda -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Africa/Kampala 2:09:40 - LMT 1928 Jul - 3:00 - EAT 1930 - 2:30 - BEAT 1948 - 2:45 - BEAUT 1957 - 3:00 - EAT +# See Africa/Nairobi. # Zambia -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Africa/Lusaka 1:53:08 - LMT 1903 Mar - 2:00 - CAT - # Zimbabwe -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Africa/Harare 2:04:12 - LMT 1903 Mar - 2:00 - CAT +# See Africa/Johannesburg. diff --git a/antarctica b/antarctica index 16aedaa..38720a8 100644 --- a/antarctica +++ b/antarctica @@ -207,12 +207,11 @@ Zone Indian/Kerguelen 0 - zzz 1950 # Port-aux-Français # Syowa station, which is the first antarctic station of Japan, # was established on 1957-01-29. Since Syowa station is still the main # station of Japan, it's appropriate for the principal location. -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Antarctica/Syowa 0 - zzz 1957 Jan 29 - 3:00 - SYOT # Syowa Time # See: # NIPR Antarctic Research Activities (1999-08-17) # <http://www.nipr.ac.jp/english/ara01.html> +# +# See Africa/Nairobi. # S Korea - year-round base # Jang Bogo, Terra Nova Bay, -743700+1641205 since 2014 -- 1.9.1

4 6

[PATCH] Replace some zones with links when that doesn't lose useful info.
by Paul Eggert July 11, 2014

July 11, 2014

This is like the 2013-09-02 change, but for the Pacific this time. * antarctica (Antarctica/DumontDUrville): * australasia (Pacific/Tahiti, Pacific/Saipan, Pacific/Majuro) (Pacific/Chuuk, Pacific/Pohnpei, Pacific/Palau, Pacific/Funafuti) (Pacific/Midway, Pacific/Wake, Pacific/Wallis): Remove zone, replacing each with a link to a region that has had the same UTC offset since 1970. This removes data that were largely invented, either by us or almost surely by Shanks or his sources. * asia, australasia, northamerica: Create links accordingly. * NEWS: Document this. --- NEWS | 9 +++++++++ antarctica | 7 +------ asia | 3 +++ australasia | 53 +++++++++++++++++++---------------------------------- northamerica | 1 + 5 files changed, 33 insertions(+), 40 deletions(-) diff --git a/NEWS b/NEWS index 82c83c9..222f91e 100644 --- a/NEWS +++ b/NEWS @@ -58,6 +58,15 @@ Unreleased, experimental changes UTC+6 and not UTC+8. (Thanks to Luther Ma and to Alois Treindl; Treindl sent helpful translations of two papers by Guo Qingsheng.) + Some zones have been turned into links, when they differed from existing + zones only for older UTC offsets where the data were likely invented. + These changes affect UTC offsets in pre-1970 time stamps only. This is + similar to the change in release 2013e, except this time for the Pacific. + The affected zones are: Antarctica/DumontDUrville, Pacific/Chuuk, + Pacific/Funafuti, Pacific/Majuro, Pacific/Midway, Pacific/Palau, + Pacific/Pohnpei, Pacific/Saipan, Pacific/Tahiti, Pacific/Wake, and + Pacific/Wallis. + Asia/Shanghai's pre-standard-time UT offset has been changed from 8:05:57 to 8:05:43, the location of Xujiahui Observatory. Its transition to standard time has been changed from 1928 to 1901. diff --git a/antarctica b/antarctica index 9e9d118..16aedaa 100644 --- a/antarctica +++ b/antarctica @@ -180,15 +180,10 @@ Zone Indian/Kerguelen 0 - zzz 1950 # Port-aux-Français # year-round base in the main continent # Dumont d'Urville, Île des Pétrels, -6640+14001, since 1956-11 # <http://en.wikipedia.org/wiki/Dumont_d'Urville_Station> (2005-12-05) +# See Pacific/Port_Moresby. # # Another base at Port-Martin, 50km east, began operation in 1947. # It was destroyed by fire on 1952-01-14. -# -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Antarctica/DumontDUrville 0 - zzz 1947 - 10:00 - PMT 1952 Jan 14 # Port-Martin Time - 0 - zzz 1956 Nov - 10:00 - DDUT # Dumont-d'Urville Time # France & Italy - year-round base # Concordia, -750600+1232000, since 2005 diff --git a/asia b/asia index 4d9faeb..68994d5 100644 --- a/asia +++ b/asia @@ -1432,6 +1432,9 @@ Zone Asia/Tokyo 9:18:59 - LMT 1887 Dec 31 15:00u 9:00 Japan J%sT # Since 1938, all Japanese possessions have been like Asia/Tokyo. +# The following region has been like Asia/Tokyo since at least 1970. +Link Asia/Tokyo Pacific/Palau + # Jordan # # From <http://star.arabia.com/990701/JO9.html> diff --git a/australasia b/australasia index 605d8dd..cd9c3e4 100644 --- a/australasia +++ b/australasia @@ -355,8 +355,7 @@ Zone Pacific/Gambier -8:59:48 - LMT 1912 Oct # Rikitea -9:00 - GAMT # Gambier Time Zone Pacific/Marquesas -9:18:00 - LMT 1912 Oct -9:30 - MART # Marquesas Time -Zone Pacific/Tahiti -9:58:16 - LMT 1912 Oct # Papeete - -10:00 - TAHT # Tahiti Time +# See Pacific/Honolulu for Tahiti. # Clipperton (near North America) is administered from French Polynesia; # it is uninhabited. @@ -366,11 +365,16 @@ Zone Pacific/Guam -14:21:00 - LMT 1844 Dec 31 9:39:00 - LMT 1901 # Agana 10:00 - GST 2000 Dec 23 # Guam 10:00 - ChST # Chamorro Standard Time +Link Pacific/Guam Pacific/Saipan # N Mariana Is # Kiribati # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Pacific/Tarawa 11:32:04 - LMT 1901 # Bairiki 12:00 - GILT # Gilbert Is Time +Link Pacific/Tarawa Pacific/Funafuti # Tuvalu +Link Pacific/Tarawa Pacific/Majuro # Marshall Is (most locations) +Link Pacific/Tarawa Pacific/Wake # in US minor outlying islands +Link Pacific/Tarawa Pacific/Wallis # Wallis and Futuna Zone Pacific/Enderbury -11:24:20 - LMT 1901 -12:00 - PHOT 1979 Oct # Phoenix Is Time -11:00 - PHOT 1995 @@ -381,29 +385,20 @@ Zone Pacific/Kiritimati -10:29:20 - LMT 1901 14:00 - LINT # N Mariana Is -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -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 - 10:00 - ChST # Chamorro Standard Time +# See Pacific/Guam. # Marshall Is +# See Pacific/Tarawa for most locations. # Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Pacific/Majuro 11:24:48 - LMT 1901 - 11:00 - MHT 1969 Oct # Marshall Islands Time - 12:00 - MHT Zone Pacific/Kwajalein 11:09:20 - LMT 1901 11:00 - MHT 1969 Oct -12:00 - KWAT 1993 Aug 20 # Kwajalein Time 12:00 - MHT # Micronesia +# See Pacific/Guadalcanal for Pohnpei. +# See Pacific/Port_Moresby for Chuuk. # Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Pacific/Chuuk 10:07:08 - LMT 1901 - 10:00 - CHUT # Chuuk Time -Zone Pacific/Pohnpei 10:32:52 - LMT 1901 # Kolonia - 11:00 - PONT # Pohnpei Time Zone Pacific/Kosrae 10:51:56 - LMT 1901 11:00 - KOST 1969 Oct # Kosrae Time 12:00 - KOST 1999 @@ -509,15 +504,15 @@ Zone Pacific/Norfolk 11:11:52 - LMT 1901 # Kingston 11:30 - NFT # Norfolk Time # Palau (Belau) -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Pacific/Palau 8:57:56 - LMT 1901 # Koror - 9:00 - PWT # Palau Time +# See Asia/Tokyo. # Papua New Guinea # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Pacific/Port_Moresby 9:48:40 - LMT 1880 9:48:32 - PMMT 1895 # Port Moresby Mean Time 10:00 - PGT # Papua New Guinea Time +Link Pacific/Port_Moresby Antarctica/DumontDUrville +Link Pacific/Port_Moresby Pacific/Chuuk # in Micronesia # Pitcairn # Zone NAME GMTOFF RULES FORMAT [UNTIL] @@ -532,6 +527,7 @@ Zone Pacific/Pago_Pago 12:37:12 - LMT 1879 Jul 5 -11:00 - NST 1967 Apr # N=Nome -11:00 - BST 1983 Nov 30 # B=Bering -11:00 - SST # S=Samoa +Link Pacific/Pago_Pago Pacific/Midway # in US minor outlying islands # Samoa (formerly and also known as Western Samoa) @@ -619,6 +615,7 @@ Zone Pacific/Apia 12:33:04 - LMT 1879 Jul 5 # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Pacific/Guadalcanal 10:39:48 - LMT 1912 Oct # Honiara 11:00 - SBT # Solomon Is Time +Link Pacific/Guadalcanal Pacific/Pohnpei # in Micronesia # Tokelau Is # @@ -657,9 +654,7 @@ Zone Pacific/Tongatapu 12:19:20 - LMT 1901 13:00 Tonga TO%sT # Tuvalu -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Pacific/Funafuti 11:56:52 - LMT 1901 - 12:00 - TVT # Tuvalu Time +# See Pacific/Tarawa. # US minor outlying islands @@ -724,21 +719,13 @@ Zone Pacific/Funafuti 11:56:52 - LMT 1901 # Fri. 6:30A Lv. HONOLOLU (Pearl Harbor), H.I. H.L.T. Ar. 5:30P Sun. # " 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 +# See Pacific/Pago_Pago. # Palmyra # uninhabited since World War II; was probably like Pacific/Kiritimati # Wake -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Pacific/Wake 11:06:28 - LMT 1901 - 12:00 - WAKT # Wake Time - +# See Pacific/Tarawa. # Vanuatu # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S @@ -753,9 +740,7 @@ Zone Pacific/Efate 11:13:16 - LMT 1912 Jan 13 # Vila 11:00 Vanuatu VU%sT # Vanuatu Time # Wallis and Futuna -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Pacific/Wallis 12:15:20 - LMT 1901 - 12:00 - WFT # Wallis & Futuna Time +# See Pacific/Tarawa. ############################################################################### diff --git a/northamerica b/northamerica index 66f362b..842f6e4 100644 --- a/northamerica +++ b/northamerica @@ -592,6 +592,7 @@ Zone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00 #Schmitt&Cox -10:00 - HST Link Pacific/Honolulu Pacific/Johnston +Link Pacific/Honolulu Pacific/Tahiti # in French Polynesia # Now we turn to US areas that have diverged from the consensus since 1970. -- 1.9.1

9 19

Proposal - territorial coverage of an IANA zone - define, document, enforce
by Tobias Conradi July 10, 2014

July 10, 2014

Proposal 1) Define what territory an IANA zone covers 2) Include the definition in the documentation 3) Enforce the definition If there would be a definition that territories that use different abbreviations shall have different zones, then the merger On Thu, Jul 10, 2014 at 8:41 PM, Paul Eggert <eggert(a)cs.ucla.edu> wrote: > Alan Barrett wrote: >> To the best of my knowledge, most other African countries that share the >> same UTC offset do not use the abbreviation "SAST" > Thanks for catching this; this was indeed an error in the merge, would have violated 3). Is it really true, that starting 2014-07-10 IANA zones are created based on acronym observation? Also "coincidence" as in On Thu, Jul 10, 2014 at 8:39 PM, Paul Eggert <eggert(a)cs.ucla.edu> wrote: > This is a good point, and in some cases in hindsight I went too far in > merging zones that were coincidentally the same would need definition, if one really wants to base territorial extension of IANA zones on such a vaguely defined concept which can lead to decision that may look arbitrary. And arbitrary seems to be the other rule: > This is not a question about optimizing the implementation; it's a question > of having the tz data reflect our knowledge as accurately as the current > format allows. The current format allows to have at least one zone per post-1970 ISO 3166 country and having this would allow to more accurately "reflect our knowledge", namely for abbreviations and for laws. Laws are the main source for observation of a specific standard time in any country. So one could think the territory covered by an IANA zone would at least be a subset of the territory of exactly one jurisdiction named a country in ISO 3166. If acronym observation and "coincidence" are the basis of zoning, I propose to include that in the documentation. -- Tobias Conradi Rheinsberger Str. 18 10115 Berlin Germany http://tobiasconradi.com/

1 0

No leap second on 2014-12-31.
by Tim Parenti July 9, 2014

July 9, 2014

Per IERS Bulletin C48 (2014-07-07), no leap second will be observed on 2014-12-31. This patch updates leap-seconds.list from NIST. -- Tim Parenti

2 1