Branch: Tag:

2017-03-05

2017-03-05 08:07:27 by Henrik Grubbström (Grubba) <grubba@grubba.org>

Updated to 2017a.

6:   # tz@iana.org for general use in the future). For more, please see   # the file CONTRIBUTING in the tz distribution.    - # From Paul Eggert (2014-10-31): + # 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),   # San Diego: ACS Publications, Inc. (2003).   # Unfortunately this book contains many errors and cites no sources.   # - # Gwillim Law writes that a good source - # for recent time zone data is the International Air Transport + # Many years ago Gwillim Law wrote that a good source + # for time zone data was the International Air Transport   # Association's Standard Schedules Information Manual (IATA SSIM),   # published semiannually. Law sent in several helpful summaries   # of the IATA's data after 1990. Except where otherwise noted,
31:   # 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 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.   # - # 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. - # +    # 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:      # 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:   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:   #   # 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:   # 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:   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:   # 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]
949:   # the country are close to 40 minutes earlier in sunrise than the rest   # of the country.   # - # From Paul Eggert (2007-03-31): - # Apparently the Caprivi Strip informally observes Botswana time, but - # we have no details. In the meantime people there can use Africa/Gaborone. + # From Paul Eggert (2017-02-22): + # Although the Zambezi Region (formerly known as Caprivi) informally + # observes Botswana time, we have no details about historical practice. + # In the meantime people there can use Africa/Gaborone. + # See: Immanuel S. The Namibian. 2017-02-23. + # http://www.namibian.com.na/51480/read/Time-change-divides-lawmakers      # RULE NAME FROM TO TYPE IN ON AT SAVE LETTER/S   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:   # 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:   # 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