- tz - lists.iana.org

Mapping lat/lon to timezones, in Go
by Dirkjan Ochtman July 15, 2014

July 15, 2014

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

4 3

[PATCH] Replace Africa zones with links when that doesn't lose useful info.
by Paul Eggert July 15, 2014

July 15, 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

Daylight saving time in Egypt
by newsgroups＠engine2.net July 9, 2014

July 9, 2014

Hi everyone, I search through messages and couldn't find if this information was already sent or not. It seems that there will be a change in daylight saving time in Egypt according to NOTAM (notice to airmen) issued by NOAA (below) which was sent to us with this comment: FOR THE KIND ATTENTION OF OUR VALUABLE CUSTOMERS BELOW NOTAM ISSUED TO ANNOUNCE THAT STARTING 31July2014 AT 2200 GMT , CLOCK IN EGYPT WILL BE GMT PLUS 3 HOURS PLEASE RELAY MESSAGE TO THE CONCENED PARTIES NOTAM content: A0237/14 NOTAMN Q) HECC/QXXXX/IV/NBO/A/000/999/2721N03009E005 A) HECC B) 1407312200 C) 1409252100 E) SUMMER TIME (UTC+3 HOURS) WILL BE STARTED AS ITEM B. CREATED: 02 Jul 2014 13:28:00 SOURCE: HECAYNYX Source: https://www.notams.faa.gov/ Best regards, Michal Konvalinka engine2.net

2 1

Precise meaning of FROM and TO in a rule
by Jon Skeet July 9, 2014

July 9, 2014

Sorry to be pedantic again, but I'm trying to get my head round some fiddly code, and I've come across an interesting bit of ambiguity. FROM and TO are described <http://www.ietf.org/timezones/code/zic.8.txt> like this: FROM Gives the first year in which the rule applies. Any integer > year can be supplied; the Gregorian calendar is assumed. The > word minimum (or an abbreviation) means the minimum year > representable as an integer. The word maximum (or an > abbreviation) means the maximum year representable as an > integer. Rules can describe times that are not representable > as time values, with the unrepresentable times ignored; this > allows rules to be portable among hosts with differing time > value types. TO Gives the final year in which the rule applies. In addition to > minimum and maximum (as above), the word only (or an > abbreviation) may be used to repeat the value of the FROM > field. It's not clear whether that "year" is: 1. The year in UTC at the transition 2. The year in the local time before the transition 3. The year in the local time after the transition 4. The year in the same frame of reference as the "AT" part Option 1 seems unlikely. Options 2 and 3 seem likely to be equivalent in all realistic time zones - it would be odd for a time zone to add an hour of DST at 11.30pm on December 31st, for example... and even odder for it to *subtract* an hour of DST at 00.30am on January 1st. Option 4 is tricky. In some ways it feels natural - if you're going to use one frame of reference for a time, why not do it for the date as well? On the other hand, it means that a "TO" value of (say) 2001 where the transition is at 2am UTC on January 1st in a time zone with a standard time of UTC+8 would actually have its last transition in 2000 local time, assuming I've got my maths right. Can I assume that one of option 2 or option 3 is intended, and that no sensible time zone will ever make those two options behave differently? I've tried reading the C source code, but given the subtleties involved, I'd rather trust a natural language description. If we can come to a conclusion about this, I'd like to propose that we amend the text to be unambiguous, too. Jon

5 9

Re: [tz] LMT in Moscow before 1919, Kilometre Zero point
by Paul Eggert July 8, 2014

July 8, 2014

Thanks for those corrections; that area had been using unreliable data from Shanks & Pottenger. Your email prompted me to dust off my copy of Milne and fix similar problems in some other parts of Russia, and I installed the attached patch to the experimental version of the tz database on Github; it should reflect your comments.

1 1

Fixes for minor oversights re: Russia changes on 2014-10-26.
by Tim Parenti July 8, 2014

July 8, 2014

There were a few lingering oversights in the patch set distributed earlier; see attached. -- Tim Parenti

2 1

[PATCH1/1] Propose new zone for Crozet Islands
by Antoine Leca July 8, 2014

July 8, 2014

Crozet Islands have a year-round scientific base (Alfred-Faure) since 1964. Also corrected the geographic coordinates. Noticed by Tobias Conradi <http://mm.icann.org/pipermail/tz/2012-May/017804.html> --- antarctica | 8 +++++++- zone.tab | 3 ++- 2 files changed, 9 insertions(+), 2 deletions(-) diff --git a/antarctica b/antarctica index 9bf2494..7190413 100644 --- a/antarctica +++ b/antarctica @@ -169,7 +169,6 @@ Zone Antarctica/Mawson 0 - zzz 1954 Feb 13 # French Southern Territories with year-round inhabitants # # Martin-de-Vivies Base, Amsterdam Island, -374105+0773155, since 1950 -# Alfred-Faure Base, Crozet Islands, -462551+0515152, since 1964 # Port-aux-Francais, Kerguelen Islands, -492110+0701303, since 1951; # whaling & sealing station operated 1908/1914, 1920/1929, and 1951/1956 # @@ -179,6 +178,13 @@ Zone Antarctica/Mawson 0 - zzz 1954 Feb 13 # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Indian/Kerguelen 0 - zzz 1950 # Port-aux-Francais 5:00 - TFT # ISO code TF Time + +# Alfred-Faure Base, Crozet Islands, -462551+0515125, since 1964 +# sealing & whaling stations operated variously 1802/1911+ +# Zone NAME GMTOFF RULES FORMAT [UNTIL] +Zone Indian/Alfred-Faure 0 - zzz 1963 + 4:00 - AFT # Alfred-Faure Time + # # year-round base in the main continent # Dumont-d'Urville, Ile des Petrels, -6640+14001, since 1956-11 diff --git a/zone.tab b/zone.tab index 6b98520..0f34698 100644 --- a/zone.tab +++ b/zone.tab @@ -373,7 +373,8 @@ SY +3330+03618 Asia/Damascus SZ -2618+03106 Africa/Mbabane TC +2128-07108 America/Grand_Turk TD +1207+01503 Africa/Ndjamena -TF -492110+0701303 Indian/Kerguelen +TF -492110+0701303 Indian/Kerguelen most locations +TF -462551+0515125 Indian/Alfred-Faure Crozet Islands TG +0608+00113 Africa/Lome TH +1345+10031 Asia/Bangkok TJ +3835+06848 Asia/Dushanbe -- 1.8.0.msysgit.0

2 1