From 78ca3a3151a322df89e852fa04cfafaf8fd9d93e Mon Sep 17 00:00:00 2001 From: Paul Eggert Date: Wed, 24 Aug 2016 21:38:33 -0700 Subject: [PROPOSED PATCH] Prefer UT +-NN notation for UT-offset time zones in comments. This does not change any code or data; just comments. --- NEWS | 42 +++++++++++++++++++++--------------------- Theory | 2 +- africa | 2 +- antarctica | 2 +- asia | 32 ++++++++++++++++---------------- australasia | 18 +++++++++--------- backzone | 8 ++++---- europe | 2 +- northamerica | 2 +- 9 files changed, 55 insertions(+), 55 deletions(-) diff --git a/NEWS b/NEWS index 7b105da..7882484 100644 --- a/NEWS +++ b/NEWS @@ -487,7 +487,7 @@ Release 2015d - 2015-04-24 08:09:46 -0700 Changes affecting past time stamps - America/Whitehorse switched from -09 to -08 on 1967-05-28, not + America/Whitehorse switched from UT -09 to -08 on 1967-05-28, not 1966-07-01. Also, Yukon's time zone history is documented better. (Thanks to Brian Inglis and Dennis Ferguson.) @@ -521,12 +521,12 @@ Release 2015c - 2015-04-11 08:55:55 -0700 The 1918 transition was September 10, not September 1. - The -04 time observed from 1932 to 1942 is now considered to be - standard time, not year-round DST. + The UT -04 time observed from 1932 to 1942 is now considered to + be standard time, not year-round DST. - Santiago observed DST (-03) from 1946-07-15 through 1946-08-31, - then reverted to standard time, then switched its time zone to - -05 on 1947-04-01. + Santiago observed DST (UT -03) from 1946-07-15 through + 1946-08-31, then reverted to standard time, then switched to -05 + on 1947-04-01. Assume transitions before 1968 were at 00:00, since we have no data saying otherwise. @@ -655,7 +655,7 @@ Release 2014j - 2014-11-10 17:37:11 -0800 Changes affecting current and future time stamps - Turks & Caicos' switch from US eastern time to -04 year-round + Turks & Caicos' switch from US eastern time to UT -04 year-round did not occur on 2014-11-02 at 02:00. It's currently scheduled for 2015-11-01 at 02:00. (Thanks to Chris Walton.) @@ -691,7 +691,7 @@ Release 2014i - 2014-10-21 22:04:57 -0700 years will use a similar pattern. A new Zone Pacific/Bougainville, for the part of Papua New Guinea - that plans to switch from +10 to +11 on 2014-12-28 at 02:00. + that plans to switch from UT +10 to +11 on 2014-12-28 at 02:00. (Thanks to Kiley Walbom for the heads-up.) Changes affecting time zone abbreviations @@ -701,7 +701,7 @@ Release 2014i - 2014-10-21 22:04:57 -0700 to its more-traditional value MSK on 2014-10-26 at 01:00. (Thanks to Alexander Bokovoy for the heads-up about Belarus.) - The new abbreviation IDT stands for the pre-1976 use of +08 in + The new abbreviation IDT stands for the pre-1976 use of UT +08 in Indochina, to distinguish it better from ICT (+07). Changes affecting past time stamps @@ -813,8 +813,8 @@ Release 2014g - 2014-08-28 12:31:23 -0700 Changes affecting future time stamps - Turks & Caicos is switching from US eastern time to -04 year-round, - modeled as a switch from EST/EDT to AST on 2014-11-02 at 02:00. + Turks & Caicos is switching from US eastern time to UT -04 + year-round, modeled as a switch on 2014-11-02 at 02:00. [As noted in 2014j, this switch was later delayed.] Changes affecting past time stamps @@ -997,7 +997,7 @@ Release 2014f - 2014-08-05 17:42:36 -0700 This change does not affect UTC offsets, only time zone abbreviations. (Thanks to Rich Tibbett and many others.) - Asia/Novokuznetsk shifts from NOVT to KRAT (remaining on +07) + Asia/Novokuznetsk shifts from NOVT to KRAT (remaining on UT +07) effective 2014-10-26 at 02:00 local time. The time zone abbreviation for Xinjiang Time (observed in Ürümqi) @@ -1026,7 +1026,7 @@ Release 2014f - 2014-08-05 17:42:36 -0700 zones Asia/Harbin, Asia/Chongqing, and Asia/Kashgar have been removed; backwards-compatibility links still work, albeit with different behaviors for time stamps before May 1980. Asia/Urumqi's - 1980 transition to +08 has been removed, so that it is now at + 1980 transition to UT +08 has been removed, so that it is now at +06 and not +08. (Thanks to Luther Ma and to Alois Treindl; Treindl sent helpful translations of two papers by Guo Qingsheng.) @@ -1057,8 +1057,8 @@ Release 2014f - 2014-08-05 17:42:36 -0700 Europe/Helsinki's 1942 fall-back transition was 10-04 at 01:00, not 10-03 at 00:00. (Thanks to Konstantin Hyppönen.) - Pacific/Pago_Pago has been changed from -11:30 to -11 for the period - from 1911 to 1950. + Pacific/Pago_Pago has been changed from UT -11:30 to -11 for the + period from 1911 to 1950. Pacific/Chatham has been changed to New Zealand standard time plus 45 minutes for the period before 1957, reflecting a 1956 remark in @@ -1385,15 +1385,15 @@ Release 2013h - 2013-10-25 15:32:32 -0700 Changes affecting current and future time stamps: - Libya has switched its time zone back to +02 without DST, - instead of +01 with DST. (Thanks to Even Scharning.) + Libya has switched its UT offset back to +02 without DST, instead + of +01 with DST. (Thanks to Even Scharning.) Western Sahara (Africa/El_Aaiun) uses Morocco's DST rules. (Thanks to Gwillim Law.) Changes affecting future time stamps: - Acre and (we guess) western Amazonas will switch from -04 to -05 + Acre and (we guess) western Amazonas will switch from UT -04 to -05 on 2013-11-10. This affects America/Rio_Branco and America/Eirunepe. (Thanks to Steffen Thorsen.) @@ -1480,7 +1480,7 @@ Release 2013f - 2013-09-24 23:37:36 -0700 Tocantins will very likely not observe DST starting this spring. (Thanks to Steffen Thorsen.) - Jordan will likely stay at +03 indefinitely, and will not fall + Jordan will likely stay at UT +03 indefinitely, and will not fall back this fall. Palestine will fall back at 00:00, not 01:00. (Thanks to Steffen Thorsen.) @@ -1537,7 +1537,7 @@ Release 2013e - 2013-09-19 23:50:04 -0700 Benny Lin.) This affects Asia/Dili, Asia/Jakarta, Asia/Jayapura, Asia/Makassar, and Asia/Pontianak. - Use ART (-03, standard time), rather than WARST (also UTC-3, but + Use ART (UT -03, standard time), rather than WARST (also -03, but daylight saving time) for San Luis, Argentina since 2009. Changes affecting Godthåb time stamps after 2037 if version mismatch @@ -1994,7 +1994,7 @@ Release 2012f - 2012-09-12 23:17:03 -0700 Release 2012e - 2012-08-02 20:44:55 -0700 - * australasia (Pacific/Fakaofo): Tokelau is +13, not +14. + * australasia (Pacific/Fakaofo): Tokelau is UT +13, not +14. (Thanks to Steffen Thorsen.) * Use a single version number for both code and data. diff --git a/Theory b/Theory index d8d3882..6d7342c 100644 --- a/Theory +++ b/Theory @@ -323,7 +323,7 @@ Errors in the tz database arise from many sources: * Sometimes historical timekeeping was specified more precisely than what the tz database can handle. For example, from 1909 to - 1937 Netherlands clocks were legally +00:19:32.13, but the tz + 1937 Netherlands clocks were legally UT +00:19:32.13, but the tz database cannot represent the fractional second. * Even when all the timestamp transitions recorded by the tz database diff --git a/africa b/africa index 43c8e23..d35aaa5 100644 --- a/africa +++ b/africa @@ -464,7 +464,7 @@ Zone Africa/Monrovia -0:43:08 - LMT 1882 # http://www.libyaherald.com/2013/10/24/correction-no-time-change-tomorrow/ # # From Paul Eggert (2013-10-25): -# For now, assume they're reverting to the pre-2012 rules of permanent +02. +# For now, assume they're reverting to the pre-2012 rules of permanent UT +02. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Libya 1951 only - Oct 14 2:00 1:00 S diff --git a/antarctica b/antarctica index f8b4bfb..e461fcf 100644 --- a/antarctica +++ b/antarctica @@ -27,7 +27,7 @@ # previously sealers and scientific personnel wintered # Margaret Turner reports # http://web.archive.org/web/20021204222245/http://www.dstc.qut.edu.au/DST/marg/daylight.html -# (1999-09-30) that they're UTC+5, with no DST; +# (1999-09-30) that they're UT +05, with no DST; # presumably this is when they have visitors. # # year-round bases diff --git a/asia b/asia index a935476..e285326 100644 --- a/asia +++ b/asia @@ -380,7 +380,7 @@ Rule PRC 1987 1991 - Apr Sun>=10 0:00 1:00 D # Lewiston (ME) Daily Sun (1939-05-29), p 17, said "Even the time is # different - the occupied districts going by Tokyo time, an hour # ahead of that prevailing in the rest of Shanghai." Guess that the -# Xujiahui Observatory was under French control and stuck with +08. +# Xujiahui Observatory was under French control and stuck with UT +08. # # In earlier versions of this file, China had many separate Zone entries, but # this was based on what were apparently incorrect data in Shanks & Pottenger. @@ -389,26 +389,26 @@ Rule PRC 1987 1991 - Apr Sun>=10 0:00 1:00 D # Proposed in 1918 and theoretically in effect until 1949 (although in practice # mainly observed in coastal areas), the five zones were: # -# Changbai Time ("Long-white Time", Long-white = Heilongjiang area) +08:30 +# Changbai Time ("Long-white Time", Long-white = Heilongjiang area) UT +08:30 # Asia/Harbin (currently a link to Asia/Shanghai) # Heilongjiang (except Mohe county), Jilin # -# Zhongyuan Time ("Central plain Time") -08 +# Zhongyuan Time ("Central plain Time") UT +08 # Asia/Shanghai # most of China # This currently represents most other zones as well, # as apparently these regions have been the same since 1970. # Milne gives 8:05:43.2 for Xujiahui Observatory time; round to nearest. -# Guo says Shanghai switched to +08 "from the end of the 19th century". +# Guo says Shanghai switched to UT +08 "from the end of the 19th century". # -# Long-shu Time (probably due to Long and Shu being two names of that area) +07 +# Long-shu Time (probably due to Long and Shu being two names of the area) UT +07 # Asia/Chongqing (currently a link to Asia/Shanghai) # Guangxi, Guizhou, Hainan, Ningxia, Sichuan, Shaanxi, and Yunnan; # most of Gansu; west Inner Mongolia; west Qinghai; and the Guangdong # counties Deqing, Enping, Kaiping, Luoding, Taishan, Xinxing, # Yangchun, Yangjiang, Yu'nan, and Yunfu. # -# Xin-zang Time ("Xinjiang-Tibet Time") +06 +# Xin-zang Time ("Xinjiang-Tibet Time") UT +06 # Asia/Urumqi # This currently represents Kunlun Time as well, # as apparently the two regions have been the same since 1970. @@ -421,7 +421,7 @@ Rule PRC 1987 1991 - Apr Sun>=10 0:00 1:00 D # Shihezi, Changji, Yanqi, Heshuo, Tuokexun, Tulufan, Shanshan, Hami, # Fukang, Kuitun, Kumukuli, Miquan, Qitai, and Turfan. # -# Kunlun Time +05:30 +# Kunlun Time UT +05:30 # Asia/Kashgar (currently a link to Asia/Urumqi) # West Tibet, including Pulan, Aheqi, Shufu, Shule; # West Xinjiang, including Aksu, Atushi, Yining, Hetian, Cele, Luopu, Nileke, @@ -437,7 +437,7 @@ Rule PRC 1987 1991 - Apr Sun>=10 0:00 1:00 D # # On the other hand, ethnic Uyghurs, who make up about half the # population of Xinjiang, typically use "Xinjiang time" which is two -# hours behind Beijing time, or UTC +0600. The government of the Xinjiang +# hours behind Beijing time, or UT +06. The government of the Xinjiang # Uyghur Autonomous Region, (XAUR, or just Xinjiang for short) as well as # local governments such as the Ürümqi city government use both times in # publications, referring to what is popularly called Xinjiang time as @@ -493,8 +493,8 @@ Rule PRC 1987 1991 - Apr Sun>=10 0:00 1:00 D # having the same time as Beijing. # From Paul Eggert (2014-06-30): -# In the early days of the PRC, Tibet was given its own time zone (+06) but -# this was withdrawn in 1959 and never reinstated; see Tubten Khétsun, +# In the early days of the PRC, Tibet was given its own time zone (UT +06) +# but this was withdrawn in 1959 and never reinstated; see Tubten Khétsun, # Memories of life in Lhasa under Chinese Rule, Columbia U Press, ISBN # 978-0231142861 (2008), translator's introduction by Matthew Akester, p x. # As this is before our 1970 cutoff, Tibet doesn't need a separate zone. @@ -508,7 +508,7 @@ Rule PRC 1987 1991 - Apr Sun>=10 0:00 1:00 D # Republics, the Soviet Union, the Kuomintang, and the People's Republic of # China, and tracking down all these organizations' timekeeping rules would be # quite a trick. Approximate this lost history by a transition from LMT to -# +06 at the start of 1928, the year of accession of the warlord Jin Shuren, +# UT +06 at the start of 1928, the year of accession of the warlord Jin Shuren, # which happens to be the date given by Shanks & Pottenger (no doubt as a # guess) as the transition from LMT. Ignore the usage of +08 before # 1986-02-01 under the theory that the transition date to +08 is unknown and @@ -718,7 +718,7 @@ Zone Asia/Hong_Kong 7:36:42 - LMT 1904 Oct 30 # be found from historical government announcement database. # From Paul Eggert (2014-07-03): -# As per Yu-Cheng Chuang, say that Taiwan was at +09 from 1937-10-01 +# As per Yu-Cheng Chuang, say that Taiwan was at UT +09 from 1937-10-01 # until 1945-09-21 at 01:00, overriding Shanks & Pottenger. # Likewise, use Yu-Cheng Chuang's data for DST in Taiwan. @@ -917,7 +917,7 @@ Zone Asia/Kolkata 5:53:28 - LMT 1880 # Kolkata # These would be the earliest possible times for a change. # Régimes horaires pour le monde entier, by Henri Le Corre, (Éditions # Traditionnelles, 1987, Paris) says that Java and Madura switched -# from +09 to +07:30 on 1945-09-23, and gives 1944-09-01 for Jayapura +# from UT +09 to +07:30 on 1945-09-23, and gives 1944-09-01 for Jayapura # (Hollandia). For now, assume all Indonesian locations other than Jayapura # switched on 1945-09-23. # @@ -928,7 +928,7 @@ Zone Asia/Kolkata 5:53:28 - LMT 1880 # Kolkata # summary published by the Time and Frequency Laboratory of the # Research Center for Calibration, Instrumentation and Metrology, # Indonesia, (2006-09-29). -# The abbreviations are: +# The time zone abbreviations and UT offsets are: # # WIB - +07 - Waktu Indonesia Barat (Indonesia western time) # WITA - +08 - Waktu Indonesia Tengah (Indonesia central time) @@ -2041,7 +2041,7 @@ Zone Indian/Maldives 4:54:00 - LMT 1880 # Male # Bill Bonnet (2005-05-19) reports that the US Embassy in Ulaanbaatar says # there is only one time zone and that DST is observed, citing Microsoft # Windows XP as the source. Risto Nykänen (2005-05-16) reports that -# travelmongolia.org says there are two time zones (+07, +08) with no DST. +# travelmongolia.org says there are two time zones (UT +07, +08) with no DST. # Oscar van Vlijmen (2005-05-20) reports that the Mongolian Embassy in # Washington, DC says there are two time zones, with DST observed. # He also found @@ -2677,7 +2677,7 @@ Link Asia/Qatar Asia/Bahrain # earlier date. # # Shanks & Pottenger also state that until 1968-05-01 Saudi Arabia had two -# time zones; the other zone, at +04, was in the far eastern part of +# time zones; the other zone, at UT +04, was in the far eastern part of # the country. Ignore this, as it's before our 1970 cutoff. # # Zone NAME GMTOFF RULES FORMAT [UNTIL] diff --git a/australasia b/australasia index fe77d07..f49df1d 100644 --- a/australasia +++ b/australasia @@ -545,7 +545,7 @@ Zone Pacific/Port_Moresby 9:48:40 - LMT 1880 # Base the Bougainville entry on the Arawa-Kieta region, which appears to have # the most people even though it was devastated in the Bougainville Civil War. # -# Although Shanks gives 1942-03-15 / 1943-11-01 for +09, these dates +# Although Shanks gives 1942-03-15 / 1943-11-01 for UT +09, these dates # are apparently rough guesswork from the starts of military campaigns. # The World War II entries below are instead based on Arawa-Kieta. # The Japanese occupied Kieta in July 1942, @@ -553,7 +553,7 @@ Zone Pacific/Port_Moresby 9:48:40 - LMT 1880 # http://pwencycl.kgbudge.com/B/o/Bougainville.htm # and seem to have controlled it until their 1945-08-21 surrender. # -# The Autonomous Region of Bougainville switched from +10 to +11 +# The Autonomous Region of Bougainville switched from UT +10 to +11 # on 2014-12-28 at 02:00. They call +11 "Bougainville Standard Time"; # abbreviate this as BST. See: # http://www.bougainville24.com/bougainville-issues/bougainville-gets-own-timezone/ @@ -620,7 +620,7 @@ Link Pacific/Pago_Pago Pacific/Midway # in US minor outlying islands # From Paul Eggert (2014-06-27): # The International Date Line Act 2011 # http://www.parliament.gov.ws/images/ACTS/International_Date_Line_Act__2011_-_Eng.pdf -# changed Samoa from -11 to +13, effective "12 o'clock midnight, on +# changed Samoa from UT -11 to +13, effective "12 o'clock midnight, on # Thursday 29th December 2011". The International Date Line was adjusted # accordingly. @@ -715,7 +715,7 @@ Zone Pacific/Funafuti 11:56:52 - LMT 1901 # 1886-1891; Baker was similar but exact dates are not known. # Inhabited by civilians 1935-1942; U.S. military bases 1943-1944; # uninhabited thereafter. -# Howland observed Hawaii Standard Time (-10:30) in 1937; +# Howland observed Hawaii Standard Time (UT -10:30) in 1937; # see page 206 of Elgen M. Long and Marie K. Long, # Amelia Earhart: the Mystery Solved, Simon & Schuster (2000). # So most likely Howland and Baker observed Hawaii Time from 1935 @@ -1473,7 +1473,7 @@ Zone Pacific/Wallis 12:15:20 - LMT 1901 # Zealand time. I understand that is the time they keep locally, anyhow." # For now, assume this practice goes back to the introduction of standard time # in New Zealand, as this would make Chatham Islands time almost exactly match -# LMT back when New Zealand was at +11:30; also, assume Chatham Islands did +# LMT back when New Zealand was at UT +11:30; also, assume Chatham Islands did # not observe New Zealand's prewar DST. ############################################################################### @@ -1529,7 +1529,7 @@ Zone Pacific/Wallis 12:15:20 - LMT 1901 # For now, we assume the Ladrones switched at the same time as the Philippines; # see Asia/Manila. -# US Public Law 106-564 (2000-12-23) made +10 the official standard time, +# US Public Law 106-564 (2000-12-23) made UT +10 the official standard time, # under the name "Chamorro Standard Time". There is no official abbreviation, # but Congressman Robert A. Underwood, author of the bill that became law, # wrote in a press release (2000-12-27) that he will seek the use of "ChST". @@ -1541,14 +1541,14 @@ Zone Pacific/Wallis 12:15:20 - LMT 1901 # "I am certain, having lived there for the past decade, that 'Truk' # (now properly known as Chuuk) ... is in the time zone GMT+10." # -# Shanks & Pottenger write that Truk switched from +10 to +11 +# Shanks & Pottenger write that Truk switched from UT +10 to +11 # on 1978-10-01; ignore this for now. # From Paul Eggert (1999-10-29): # The Federated States of Micronesia Visitors Board writes in # The Federated States of Micronesia - Visitor Information (1999-01-26) # http://www.fsmgov.org/info/clocks.html -# that Truk and Yap are +10, and Ponape and Kosrae are +11. +# that Truk and Yap are UT +10, and Ponape and Kosrae are +11. # We don't know when Kosrae switched from +12; assume January 1 for now. @@ -1615,7 +1615,7 @@ Zone Pacific/Wallis 12:15:20 - LMT 1901 # ordaining - by a masterpiece of diplomatic flattery - that # the Fourth of July should be celebrated twice in that year." -# Although Shanks & Pottenger says they both switched to -11:30 +# Although Shanks & Pottenger says they both switched to UT -11:30 # in 1911, and to -11 in 1950. many earlier sources give -11 # for American Samoa, e.g., the US National Bureau of Standards # circular "Standard Time Throughout the World", 1932. diff --git a/backzone b/backzone index 27a5472..4a5085f 100644 --- a/backzone +++ b/backzone @@ -194,7 +194,7 @@ Zone Africa/Lusaka 1:53:08 - LMT 1903 Mar # Equatorial Guinea # -# Although Shanks says that Malabo switched from +00 to +01 on 1963-12-15, +# Although Shanks says that Malabo switched from UT +00 to +01 on 1963-12-15, # a Google Books search says that London Calling, Issues 432-465 (1948), p 19, # says that Spanish Guinea was at +01 back then. The Shanks data entries # are most likely wrong, but we have nothing better; use them here for now. @@ -479,13 +479,13 @@ Zone Asia/Muscat 3:54:24 - LMT 1920 # 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 -# Portuguese India switched to +05 on 1912-01-01. +# Portuguese India switched to UT +05 on 1912-01-01. #Zone Asia/Panaji [not enough info to complete] # Cambodia # From Paul Eggert (2014-10-11): # See Asia/Ho_Chi_Minh for the source for most of this data. Also, guess -# (1) Cambodia reverted to +07 on 1945-09-02, when Vietnam did, and +# (1) Cambodia reverted to UT +07 on 1945-09-02, when Vietnam did, and # (2) they also reverted to +07 on 1953-11-09, the date of independence. # These guesses are probably wrong but they're better than guessing no # transitions there. @@ -506,7 +506,7 @@ Zone Asia/Tel_Aviv 2:19:04 - LMT 1880 # Laos # From Paul Eggert (2014-10-11): # See Asia/Ho_Chi_Minh for the source for most of this data. -# Trần's book says that Laos reverted to +07 on 1955-04-15. +# Trần's book says that Laos reverted to UT +07 on 1955-04-15. # Also, guess that Laos reverted to +07 on 1945-09-02, when Vietnam did; # this is probably wrong but it's better than guessing no transition. Zone Asia/Vientiane 6:50:24 - LMT 1906 Jul 1 diff --git a/europe b/europe index 3a1f9db..21d3a71 100644 --- a/europe +++ b/europe @@ -1309,7 +1309,7 @@ Zone Europe/Paris 0:09:21 - LMT 1891 Mar 15 0:01 # http://www.parlament-berlin.de/pds-fraktion.nsf/727459127c8b66ee8525662300459099/defc77cb784f180ac1256c2b0030274b/$FILE/bersarint.pdf # says that Bersarin issued an order to use Moscow time on May 20. # However, Moscow did not observe daylight saving in 1945, so -# this was equivalent to +03, not +04. +# this was equivalent to UT +03, not +04. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S diff --git a/northamerica b/northamerica index 0c069bb..0bafb00 100644 --- a/northamerica +++ b/northamerica @@ -3312,7 +3312,7 @@ Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre # indicating that the normal ET rules are followed. # # From Paul Eggert (2014-08-19): -# The 2014-08-13 Cabinet meeting decided to stay on -04 year-round. See: +# The 2014-08-13 Cabinet meeting decided to stay on UT -04 year-round. See: # http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm # Model this as a switch from EST/EDT to AST ... # From Chris Walton (2014-11-04): -- 2.7.4