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Request to add entry to "Programmatic interfaces that map geographical coordinates"
by Evan Siroky Dec. 10, 2016

Dec. 10, 2016

Hello, I maintain a node.js library that looks up the timezone name at a GPS coordinate. The project is called geo-tz: https://www.npmjs.com/package/geo-tz My library uses data produced from timezone-boundary-builder. Can you please add an entry to tz-link.html for my project? Thanks,Evan

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west Qinghai listed in two different time zones
by Jeffrey Oldham Dec. 9, 2016

Dec. 9, 2016

In tzdata2016f.tar.gz / asia, "west Qinghai" is listed under Asia/Chongqing (line 410) and also under Asia/Urumqi (line 418). I believe the former should be east Qinghai. Thanks, Jeffrey D. Oldham oldham(a)google.com

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Earth's day lengthens by two milliseconds a century
by J William Piggott Dec. 9, 2016

Dec. 9, 2016

https://www.theguardian.com/science/2016/dec/07/earths-day-lengthens-by-two… Also an interesting explanation on why Earth's deceleration rate has decreased recently.

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hundreds demonstrate against clock changes in Northern Cyprus
by Paul Eggert Dec. 6, 2016

Dec. 6, 2016

Hundreds of union members and students demonstrated yesterday in northern Cyprus, protesting the decision to remain on +03 all year. This follows a school bus collision Tuesday morning, which killed the driver and two schoolgirls, and which was blamed in part on early-morning darkness. Sources: Turkish Cypriots protest daylight saving time after deadly crash. Agence France Presse 2016-12-01. http://www.naharnet.com/stories/en/221371-turkish-cypriots-protest-daylight… Anastasiou A. Unions call for more strikes in north until clock is changed back. Cyprus Mail 2016-12-02. http://cyprus-mail.com/2016/12/02/unions-call-strikes-north-clock-changed-b…

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[PROPOSED] New zone Asia/Atyrau
by Paul Eggert Dec. 6, 2016

Dec. 6, 2016

(Thanks to Stepan Golosunov.) * NEWS: Document this. * asia, zone.tab, zone1970.tab (Asia/Atyrau): New zone. In comments, prefer what I assume to be Library of Congress romanization for place names in Kazakhstan. * asia (Asia/Aqtau): Omit now-redundant transition. --- NEWS | 6 ++++ asia | 91 +++++++++++++++++++++++++++++++++++------------------------- zone.tab | 3 +- zone1970.tab | 5 ++-- 4 files changed, 64 insertions(+), 41 deletions(-) diff --git a/NEWS b/NEWS index d5f7217..24faeaf 100644 --- a/NEWS +++ b/NEWS @@ -2,6 +2,12 @@ News for the tz database Unreleased, experimental changes + Changes to past time stamps + + The new zone Asia/Atyrau for Atyraū Region, Kazakhstan, is like + Asia/Aqtau except it switched from +04/+05 to +05/+06 in spring + 1999, not fall 1994. (Thanks to Stepan Golosunov.) + Changes to past time zone abbreviations Asia/Gaza and Asia/Hebron now use "EEST", not "EET", to denote diff --git a/asia b/asia index bb7534a..c6f63b5 100644 --- a/asia +++ b/asia @@ -1583,12 +1583,12 @@ Zone Asia/Amman 2:23:44 - LMT 1931 # was "blended" with the Central zone. Therefore, Kazakhstan now has # two time zones, and difference between them is one hour. The zone # closer to UTC is the former Western zone (probably still called the -# same), encompassing four provinces in the west: Aqtobe, Atyrau, -# Mangghystau, and West Kazakhstan. The other zone encompasses +# same), encompassing four provinces in the west: Aqtöbe, Atyraū, +# Mangghystaū, and West Kazakhstan. The other zone encompasses # everything else.... I guess that would make Kazakhstan time zones # de jure UTC+5 and UTC+6 respectively. -# From Stepan Golosunov (2016-03-27) ([*] means see later comments below): +# From Stepan Golosunov (2016-03-27): # Review of the linked documents from http://adilet.zan.kz/ # produced the following data for post-1991 Kazakhstan: # @@ -1634,7 +1634,7 @@ Zone Asia/Amman 2:23:44 - LMT 1931 # # This implies that on 1991-03-31 Asia/Oral remained on +04/+05 while # the rest of Kazakhstan switched from +06/+07 to +05/06 or from +05/06 -# to +04/+05. It's unclear how Kzyl-Orda oblast moved into the fifth +# to +04/+05. It's unclear how Qyzylorda oblast moved into the fifth # time belt. (By switching from +04/+05 to +05/+06 on 1991-09-29?) ... # # 1. Act of the Cabinet of Ministers of the Republic of Kazakhstan @@ -1647,25 +1647,25 @@ Zone Asia/Amman 2:23:44 - LMT 1931 # on the whole territory of Kazakhstan 1 hour forward on 1992-01-19 at # 2:00, specified DST rules. It acknowledged that Kazakhstan was # located in the fourth and the fifth time belts and specified the -# border between them to be located east of Kustanay and Aktyubinsk -# oblasts (notably including Turgai and Kzyl-Orda oblasts into the fifth +# border between them to be located east of Qostanay and Aktyubinsk +# oblasts (notably including Turgai and Qyzylorda oblasts into the fifth # time belt). # # This means switch on 1992-01-19 at 2:00 from +04/+05 to +05/+06 for -# Asia/Aqtau, Asia/Aqtobe, Asia/Oral, Atyrau and Kustanay oblasts; from -# +05/+06 to +06/+07 for Asia/Almaty and Asia/Qyzylorda (and Arkalyk) [*].... +# Asia/Aqtau, Asia/Aqtobe, Asia/Oral, Atyraū and Qostanay oblasts; from +# +05/+06 to +06/+07 for Asia/Almaty and Asia/Qyzylorda (and Arkalyk).... # # 2. Act of the Cabinet of Ministers of the Republic of Kazakhstan # from 1992-03-27 No. 284 # http://adilet.zan.kz/rus/docs/P920000284_ -# cancels extra hour ("decree time") for Uralsk and Kzyl-Orda oblasts +# cancels extra hour ("decree time") for Uralsk and Qyzylorda oblasts # since the last Sunday of March 1992, while keeping them in the fourth # and the fifth time belts respectively. # # 3. Order of the Prime Minister of the Republic of Kazakhstan # from 1994-09-23 No. 384 # http://adilet.zan.kz/rus/docs/R940000384_ -# cancels the extra hour ("decree time") on the territory of Mangystau +# cancels the extra hour ("decree time") on the territory of Mangghystaū # oblast since the last Sunday of September 1994 (saying that time on # the territory would correspond to the third time belt as a # result).... @@ -1679,14 +1679,11 @@ Zone Asia/Amman 2:23:44 - LMT 1931 # 5. Act of the Government of the Republic of Kazakhstan # from 1999-03-26 No. 305 # http://adilet.zan.kz/rus/docs/P990000305_ -# cancels the extra hour ("decree time") for Atyrau oblast since the +# cancels the extra hour ("decree time") for Atyraū oblast since the # last Sunday of March 1999 while retaining the oblast in the fourth # time belt. # -# This means change from +05/+06 to +04/+05. -# -# There is no zone for Atyrau currently (listed under Asia/Aqtau in -# zone1970.tab).[*] +# This means change from +05/+06 to +04/+05.... # # 6. Act of the Government of the Republic of Kazakhstan # from 2000-11-23 No. 1749 @@ -1696,10 +1693,10 @@ Zone Asia/Amman 2:23:44 - LMT 1931 # The only changes I noticed are in definition of the border between the # fourth and the fifth time belts. They account for changes in spelling # and administrative division (splitting of Turgai oblast in 1997 -# probably changed time in territories incorporated into Kostanay oblast -# (including Arkalyk) from +06/+07 to +05/+06) and move Kyzylorda oblast +# probably changed time in territories incorporated into Qostanay oblast +# (including Arkalyk) from +06/+07 to +05/+06) and move Qyzylorda oblast # from being in the fifth time belt and not using decree time into the -# fourth time belt (no change in practice).[*] +# fourth time belt (no change in practice). # # 7. Act of the Government of the Republic of Kazakhstan # from 2003-12-29 No. 1342 @@ -1709,7 +1706,7 @@ Zone Asia/Amman 2:23:44 - LMT 1931 # 8. Act of the Government of the Republic of Kazakhstan # from 2004-07-20 No. 775 # http://adilet.zan.kz/rus/archive/docs/P040000775_/20.07.2004 -# modified the 2000-11-23 act to move Kostanay and Kyzylorda oblasts into +# modified the 2000-11-23 act to move Qostanay and Qyzylorda oblasts into # the fifth time belt and add Aktobe oblast to the list of regions not # using extra hour ("decree time"), leaving Kazakhstan with only 2 time # zones (+04/+05 and +06/+07). The changes were to be implemented @@ -1721,14 +1718,14 @@ Zone Asia/Amman 2:23:44 - LMT 1931 # http://adilet.zan.kz/rus/docs/P040001059_ # modified the 2000-11-23 act to remove exceptions from the "decree time" # (leaving Kazakhstan in +05/+06 and +06/+07 zones), amended the -# 2004-07-20 act to implement changes for Atyrau, West Kazakhstan, -# Kostanay, Kyzylorda and Mangystau oblasts by not moving clocks -# during the 2014 transition to "winter" time. +# 2004-07-20 act to implement changes for Atyraū, West Kazakhstan, +# Qostanay, Qyzylorda and Mangghystaū oblasts by not moving clocks +# during the 2004 transition to "winter" time. # -# This means transition from +04/+05 to +05/+06 for Atyrau oblast (no +# This means transition from +04/+05 to +05/+06 for Atyraū oblast (no # zone currently), Asia/Oral, Asia/Aqtau and transition from +05/+06 to -# +06/+07 for Kostanay oblast (Kostanay and Arkalyk, no zones currently) -# and Asia/Qyzylorda on 2004-10-31 at 3:00....[*] +# +06/+07 for Qostanay oblast (Qostanay and Arkalyk, no zones currently) +# and Asia/Qyzylorda on 2004-10-31 at 3:00.... # # 10. Act of the Government of the Republic of Kazakhstan # from 2005-03-15 No. 231 @@ -1744,14 +1741,9 @@ Zone Asia/Amman 2:23:44 - LMT 1931 # Kazakh 1992-01-13 act appears to provide the same rules and 1992-03-27 # act was to be enacted on the last Sunday of March 1992. -# From Paul Eggert (2016-04-15): -# The tables below should reflect Stepan Golosunov's remarks above, -# except for the items marked "[*]" which I haven't gotten to yet. -# It looks like we will need new zones Asia/Atyrau and Asia/Qostanay -# to handle changes from 1992 through 2004 that we did not previously -# know about. +# From Paul Eggert (2016-11-07): +# The tables below reflect Golosunov's remarks, with exceptions as noted. -# # Zone NAME GMTOFF RULES FORMAT [UNTIL] # # Almaty (formerly Alma-Ata), representing most locations in Kazakhstan @@ -1764,6 +1756,8 @@ Zone Asia/Almaty 5:07:48 - LMT 1924 May 2 # or Alma-Ata 6:00 RussiaAsia +06/+07 2004 Oct 31 2:00s 6:00 - +06 # Qyzylorda (aka Kyzylorda, Kizilorda, Kzyl-Orda, etc.) (KZ-KZY) +# This currently includes Qostanay (aka Kostanay, Kustanay) (KZ-KUS); +# see comments below. Zone Asia/Qyzylorda 4:21:52 - LMT 1924 May 2 4:00 - +04 1930 Jun 21 5:00 - +05 1981 Apr 1 @@ -1775,7 +1769,21 @@ Zone Asia/Qyzylorda 4:21:52 - LMT 1924 May 2 6:00 RussiaAsia +06/+07 1992 Mar 29 2:00s 5:00 RussiaAsia +05/+06 2004 Oct 31 2:00s 6:00 - +06 -# Aqtobe (aka Aktobe, formerly Aktyubinsk) (KZ-AKT) +# The following zone is like Asia/Qyzylorda except for being one +# hour earlier from 1991-09-29 to 1992-03-29. The 1991/2 rules for +# Qostenay are unclear partly because of the 1997 Turgai +# reorganization, so this zone is commented out for now. +#Zone Asia/Qostanay 4:14:20 - LMT 1924 May 2 +# 4:00 - +04 1930 Jun 21 +# 5:00 - +05 1981 Apr 1 +# 5:00 1:00 +06 1981 Oct 1 +# 6:00 - +06 1982 Apr 1 +# 5:00 RussiaAsia +05/+06 1991 Mar 31 2:00s +# 4:00 RussiaAsia +04/+05 1992 Jan 19 2:00s +# 5:00 RussiaAsia +05/+06 2004 Oct 31 2:00s +# 6:00 - +06 +# +# Aqtöbe (aka Aktobe, formerly Aktyubinsk) (KZ-AKT) Zone Asia/Aqtobe 3:48:40 - LMT 1924 May 2 4:00 - +04 1930 Jun 21 5:00 - +05 1981 Apr 1 @@ -1785,14 +1793,11 @@ Zone Asia/Aqtobe 3:48:40 - LMT 1924 May 2 4:00 RussiaAsia +04/+05 1992 Jan 19 2:00s 5:00 RussiaAsia +05/+06 2004 Oct 31 2:00s 5:00 - +05 -# Qostanay (KZ-KUS) - -# Mangghystau (KZ-MAN) +# Mangghystaū (KZ-MAN) # Aqtau was not founded until 1963, but it represents an inhabited region, # so include time stamps before 1963. Zone Asia/Aqtau 3:21:04 - LMT 1924 May 2 4:00 - +04 1930 Jun 21 - 5:00 - +05 1963 5:00 - +05 1981 Oct 1 6:00 - +06 1982 Apr 1 5:00 RussiaAsia +05/+06 1991 Mar 31 2:00s @@ -1800,7 +1805,17 @@ Zone Asia/Aqtau 3:21:04 - LMT 1924 May 2 5:00 RussiaAsia +05/+06 1994 Sep 25 2:00s 4:00 RussiaAsia +04/+05 2004 Oct 31 2:00s 5:00 - +05 - +# Atyraū (KZ-ATY) is like Mangghystaū except it switched from +# +04/+05 to +05/+06 in spring 1999, not fall 1994. +Zone Asia/Atyrau 3:27:44 - LMT 1924 May 2 + 4:00 - +04 1930 Jun 21 + 5:00 - +05 1981 Oct 1 + 6:00 - +06 1982 Apr 1 + 5:00 RussiaAsia +05/+06 1991 Mar 31 2:00s + 4:00 RussiaAsia +04/+05 1992 Jan 19 2:00s + 5:00 RussiaAsia +05/+06 1999 Mar 28 2:00s + 4:00 RussiaAsia +04/+05 2004 Oct 31 2:00s + 5:00 - +05 # West Kazakhstan (KZ-ZAP) # From Paul Eggert (2016-03-18): # The 1989 transition is from USSR act No. 227 (1989-03-14). diff --git a/zone.tab b/zone.tab index f4969d2..bf78be7 100644 --- a/zone.tab +++ b/zone.tab @@ -239,7 +239,8 @@ KY +1918-08123 America/Cayman KZ +4315+07657 Asia/Almaty Kazakhstan (most areas) KZ +4448+06528 Asia/Qyzylorda Qyzylorda/Kyzylorda/Kzyl-Orda KZ +5017+05710 Asia/Aqtobe Aqtobe/Aktobe -KZ +4431+05016 Asia/Aqtau Atyrau/Atirau/Gur'yev, Mangghystau/Mankistau +KZ +4431+05016 Asia/Aqtau Mangghystau/Mankistau +KZ +4707+05156 Asia/Atyrau Atyrau/Atirau/Gur'yev KZ +5113+05121 Asia/Oral West Kazakhstan LA +1758+10236 Asia/Vientiane LB +3353+03530 Asia/Beirut diff --git a/zone1970.tab b/zone1970.tab index f48f7a6..ea2e1e5 100644 --- a/zone1970.tab +++ b/zone1970.tab @@ -210,8 +210,9 @@ KP +3901+12545 Asia/Pyongyang KR +3733+12658 Asia/Seoul KZ +4315+07657 Asia/Almaty Kazakhstan (most areas) KZ +4448+06528 Asia/Qyzylorda Qyzylorda/Kyzylorda/Kzyl-Orda -KZ +5017+05710 Asia/Aqtobe Aqtobe/Aktobe -KZ +4431+05016 Asia/Aqtau Atyrau/Atirau/Gur'yev, Mangghystau/Mankistau +KZ +5017+05710 Asia/Aqtobe Aqtöbe/Aktobe +KZ +4431+05016 Asia/Aqtau Mangghystaū/Mankistau +KZ +4707+05156 Asia/Atyrau Atyraū/Atirau/Gur'yev KZ +5113+05121 Asia/Oral West Kazakhstan LB +3353+03530 Asia/Beirut LK +0656+07951 Asia/Colombo -- 2.7.4

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Fwd: [IANA #939704] Contributions to this list
by panda Dec. 6, 2016

Dec. 6, 2016

Dear Sir/Madam Please make the changes to time zone database: Ukraine: Kiev => Kyiv, Zaporozh'ye => Zaporizhia, Uzhgorod => Uzhhorod, Odessa => Odesa according to legal names and MORE COMMON USE in ENGLISH (like booking services or names of the airports, railway stations, river and sea ports and everyday speaking usage). Autonomous Republic of Crimea (Ukraine): Crimea, Republic of => Crimea, Autonomous Republic of according to legal name of the Ukrainian territory occupied by Russians terrorists forces. The name "Autonomous Republic of Crimea" is officially recognized by all of the countries (except the Russian Federation - the terrorist's country number one in the World) and in international COMMON USE in ENGLISH navigation systems of the air, sea and river transport systems. Sevastopol MSK => Sevastopol KMT Simferopol MSK => Simferopol KMT according to legal time usage on the Ukrainian territory. Andrii Pertsiukh -------- Forwarded Message -------- Тема: [IANA #939704] Contributions to this list Дата: Thu, 01 Dec 2016 20:16:50 +0000 Від: Amanda Baber via RT <iana-questions(a)iana.org> Відповісти: iana-questions(a)iana.org Кому: aristonomy(a)gmail.com Dear Sir/Madam, Thank you for contacting us. We host the Time Zone Database, but updates are made by the Time Zone Coordinator in consultation with the Time Zone mailing list, in accordance with RFC 6557. Questions about the contents of the database should be sent to the mailing list. For mailing list archives and subscription information, please see http://www.iana.org/time-zones Best regards, Amanda Baber Lead IANA Services Specialist PTI On Thu Dec 01 10:28:43 2016, aristonomy(a)gmail.com wrote: > To the holder of iana.org! > > Contributions to this list of time zones! > > "Uzhhorod International Airport", "Kyiv International Airport > (Zhuliany)", "Kyiv Boryspil international airport", "Zaporizhia > International Airport" which are MORE COMMON USE in every ENGLISH > booking service. The same names are used in the railway stations names > and booking services. > > Even more! Kyiv, Uzhhorod, Zaporizhia, Odesa are the international names > of the cityes, river and sea ports, airports and railway stations, parts > of the administration and state organizations names and etcetera. > > The only common use of the names: Kiev, Zaporozh'ye, Uzhgorod and Odessa > were in USSR - the country which is not exist any more (thanks to God!), > and in the country which are occupied the part of Ukraine. Supporting > such spelling is a direct support of the country which is now are the N1 > Country Terrorist of the World!! > > Europe/Simferopol and Europe/Sevastopol now are under Russian occupation > and NO legal international communications for hole Autonomous Republic > of Crimea (Ukraine) and this territory are legally under Ukrainians Law! > > Supporting of the time change to the MSK time zone is a direct support > of occupation!! > > This letter are public and will be shared to social network. > > Stop support of Russian invasion to Ukraine and Georgia!! Stop support > of the biggest terrorists organization which Russian Federation are! > > > # From Tim Parenti (2014-07-03): > > # Europe/Simferopol covers... > > # ** **** Crimea, Republic of > > # ** **** Sevastopol > > > > Zone Europe/Simferopol 2:16:24 - LMT 1880 > > 2:16 - SMT 1924 May 2 # Simferopol Mean T > > 2:00 - EET 1930 Jun 21 > > 3:00 - MSK 1941 Nov > > 1:00 C-Eur CE%sT 1944 Apr 13 > > 3:00 Russia MSK/MSD 1990 > > 3:00 - MSK 1990 Jul 1 2:00 > > 2:00 - EET 1992 > > # Central Crimea used Moscow time 1994/1997. > > # > > # From Paul Eggert (2006-03-22): > > # The _Economist_ (1994-05-28, p 45) reports that central Crimea switched > > # from Kiev to Moscow time sometime after the January 1994 elections. > > # Shanks (1999) says "date of change uncertain", but implies that it > > happened > > # sometime between the 1994 DST switches. Shanks & Pottenger simply say > > # 1994-09-25 03:00, but that can't be right. For now, guess it > > # changed in May. > > 2:00 E-Eur EE%sT 1994 May > > # From IATA SSIM (1994/1997), which also says that Kerch is still like > > Kiev. > > 3:00 E-Eur MSK/MSD 1996 Mar 31 0:00s > > 3:00 1:00 MSD 1996 Oct 27 3:00s > > # IATA SSIM (1997-09) says Crimea switched to EET/EEST. > > # Assume it happened in March by not changing the clocks. > > 3:00 Russia MSK/MSD 1997 > > 3:00 - MSK 1997 Mar lastSun 1:00u > > # From Alexander Krivenyshev (2014-03-17): > > # time change at 2:00 (2am) on March 30, 2014 > > # http://vz.ru/news/2014/3/17/677464.html > > # From Paul Eggert (2014-03-30): > > # Simferopol and Sevastopol reportedly changed their central town clocks > > # late the previous day, but this appears to have been ceremonial > > # and the discrepancies are small enough to not worry about. > > 2:00 EU EE%sT 2014 Mar 30 2:00 > > 4:00 - MSK 2014 Oct 26 2:00s > > 3:00 - MSK > > > > > > > > # Zone NAME GMTOFF RULES FORMAT [UNTIL] > > # Most of Ukraine since 1970 has been like Kiev. > > # "Kyiv" is the transliteration of the Ukrainian name, but > > # "Kiev" is more common in English. > > Zone Europe/Kiev 2:02:04 - LMT 1880 > > 2:02:04 - KMT 1924 May 2 # Kiev Mean Time > > > > # "Uzhhorod" is the transliteration of the Rusyn/Ukrainian > > pronunciation, but > > # "Uzhgorod" is more common in English. > > Zone Europe/Uzhgorod 1:29:12 - LMT 1890 Oct > > > > # Zaporozh'ye and eastern Lugansk oblasts observed DST 1990/1991. > > # "Zaporizhia" is the transliteration of the Ukrainian name, but > > # "Zaporozh'ye" is more common in English. Use the common English > > # spelling, except omit the apostrophe as it is not allowed in > > # portable Posix file names. > > Zone Europe/Zaporozhye 2:20:40 - LMT 1880 >

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[PROPOSED] Use numeric abbrs for South American zones
by Paul Eggert Dec. 6, 2016

Dec. 6, 2016

Among other things, this treats Argentina (and Palmer) more consistently with respect to Chile. * NEWS: Document this. * southamerica (America/Argentina/Buenos_Aires) (America/Argentina/Cordoba, America/Argentina/Salta) (America/Argentina/Tucuman, America/Argentina/La_Rioja) (America/Argentina/San_Juan, America/Argentina/Jujuy) (America/Argentina/Catamarca, America/Argentina/Mendoza) (America/Argentina/San_Luis, America/Argentina/Rio_Gallegos) (America/Argentina/Ushuaia, America/La_Paz, America/Noronha) (America/Belem, America/Santarem, America/Fortaleza) (America/Recife, America/Araguaina, America/Maceio, America/Bahia) (America/Sao_Paulo, America/Campo_Grande, America/Cuiaba) (America/Porto_Velho, America/Boa_Vista, America/Manaus) (America/Eirunepe, America/Rio_Branco, America/Bogota) (America/Curacao, America/Guayaquil, Pacific/Galapagos) (Atlantic/Stanley, America/Cayenne, America/Guyana) (America/Asuncion, America/Lima, Atlantic/South_Georgia) (America/Paramaribo, America/Montevideo, America/Caracas): Use numeric rather than invented time zone abbreviations for integer-minutes UT offsets. --- NEWS | 25 +++- southamerica | 472 ++++++++++++++++++++++++++++------------------------------- 2 files changed, 244 insertions(+), 253 deletions(-) diff --git a/NEWS b/NEWS index 144a34b..31d96e8 100644 --- a/NEWS +++ b/NEWS @@ -11,11 +11,28 @@ Unreleased, experimental changes 23:00, hiving off a new zone America/Punta_Arenas. (Thanks to Juan Correa.) This also affects Antarctica/Palmer. - Changes to current and future time zone abbreviations + Changes to past and future time zone abbreviations - Switch to numeric time zones for Chile, so as to not invent an - abbreviation for its new zone. This affects America/Santiago, - Pacific/Easter, and Antarctica/Palmer. + Switch to numeric time zone abbreviations for South America, as + part of the ongoing project of removing invented abbreviations. + This avoids the need to invent an abbreviation for the new Chilean + new zone. This change affects America/Araguaina, + America/Argentina/Buenos_Aires, America/Argentina/Catamarca, + America/Argentina/Cordoba, America/Argentina/Jujuy, + America/Argentina/La_Rioja, America/Argentina/Mendoza, + America/Argentina/Rio_Gallegos, America/Argentina/Salta, + America/Argentina/San_Juan, America/Argentina/San_Luis, + America/Argentina/Tucuman, America/Argentina/Ushuaia, + America/Asuncion, America/Bahia, America/Belem, America/Boa_Vista, + America/Bogota, America/Campo_Grande, America/Caracas, + America/Cayenne, America/Cuiaba, America/Curacao, + America/Eirunepe, America/Fortaleza, America/Guayaquil, + America/Guyana, America/La_Paz, America/Lima, America/Maceio, + America/Manaus, America/Montevideo, America/Noronha, + America/Paramaribo, America/Porto_Velho, America/Recife, + America/Rio_Branco, America/Santarem, America/Santiago, + America/Sao_Paulo, Antarctica/Palmer, Atlantic/South_Georgia, + Atlantic/Stanley, Pacific/Easter, and Pacific/Galapagos. Changes to documentation and commentary diff --git a/southamerica b/southamerica index 43bc67e..a6820ac 100644 --- a/southamerica +++ b/southamerica @@ -6,15 +6,15 @@ # tz(a)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 (2016-12-05): # # 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, @@ -24,32 +24,10 @@ # Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94. # http://www.jstor.org/stable/1774359 # -# Earlier editions of these tables used the North American style (e.g. ARST and -# ARDT for Argentine Standard and Daylight Time), but the following quote -# suggests that it's better to use European style (e.g. ART and ARST). -# I suggest the use of _Summer time_ instead of the more cumbersome -# _daylight-saving time_. _Summer time_ seems to be in general use -# in Europe and South America. -# -- E O Cutler, _New York Times_ (1937-02-14), quoted in -# H L Mencken, _The American Language: Supplement I_ (1960), p 466 -# -# Earlier editions of these tables also used the North American style -# for time zones in Brazil, but this was incorrect, as Brazilians say -# "summer time". Reinaldo Goulart, a São Paulo businessman active in -# the railroad sector, writes (1999-07-06): -# The subject of time zones is currently a matter of discussion/debate in -# Brazil. Let's say that "the Brasília time" is considered the -# "official time" because Brasília is the capital city. -# The other three time zones are called "Brasília time "minus one" or -# "plus one" or "plus two". As far as I know there is no such -# name/designation as "Eastern Time" or "Central Time". -# So I invented the following (English-language) abbreviations for now. -# Corrections are welcome! -# std dst -# -2:00 FNT FNST Fernando de Noronha -# -3:00 BRT BRST Brasília -# -4:00 AMT AMST Amazon -# -5:00 ACT ACST Acre +# These tables use numeric abbreviations like -03 and -0330 for +# integer hour and minute UTC offsets. Although earlier editions used +# alphabetic time zone abbreviations, these abbreviations were +# invented and did not reflect common practice. ############################################################################### @@ -384,12 +362,6 @@ Rule Arg 2008 only - Oct Sun>=15 0:00 1:00 S # # So I guess a new set of rules, besides "Arg", must be made and the last # America/Argentina/San_Luis entries should change to use these... -# -# I'm enclosing a patch that does what I say... regretfully, the San Luis -# timezone must be called "WART/WARST" even when most of the time (like, -# right now) WARST == ART... that is, since last Sunday, all the country -# is using UTC-3, but in my patch, San Luis calls it "WARST" and the rest -# of the country calls it "ART". # ... # From Alexander Krivenyshev (2010-04-09): @@ -428,11 +400,11 @@ Rule Arg 2008 only - Oct Sun>=15 0:00 1:00 S # Buenos Aires (BA), Capital Federal (CF), Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31 -4:16:48 - CMT 1920 May # Córdoba Mean Time - -4:00 - ART 1930 Dec - -4:00 Arg AR%sT 1969 Oct 5 - -3:00 Arg AR%sT 1999 Oct 3 - -4:00 Arg AR%sT 2000 Mar 3 - -3:00 Arg AR%sT + -4:00 - -04 1930 Dec + -4:00 Arg -04/-03 1969 Oct 5 + -3:00 Arg -03/-02 1999 Oct 3 + -4:00 Arg -04/-03 2000 Mar 3 + -3:00 Arg -03/-02 # # Córdoba (CB), Santa Fe (SF), Entre Ríos (ER), Corrientes (CN), Misiones (MN), # Chaco (CC), Formosa (FM), Santiago del Estero (SE) @@ -446,113 +418,113 @@ Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31 # Zone America/Argentina/Cordoba -4:16:48 - LMT 1894 Oct 31 -4:16:48 - CMT 1920 May - -4:00 - ART 1930 Dec - -4:00 Arg AR%sT 1969 Oct 5 - -3:00 Arg AR%sT 1991 Mar 3 - -4:00 - WART 1991 Oct 20 - -3:00 Arg AR%sT 1999 Oct 3 - -4:00 Arg AR%sT 2000 Mar 3 - -3:00 Arg AR%sT + -4:00 - -04 1930 Dec + -4:00 Arg -04/-03 1969 Oct 5 + -3:00 Arg -03/-02 1991 Mar 3 + -4:00 - -04 1991 Oct 20 + -3:00 Arg -03/-02 1999 Oct 3 + -4:00 Arg -04/-03 2000 Mar 3 + -3:00 Arg -03/-02 # # Salta (SA), La Pampa (LP), Neuquén (NQ), Rio Negro (RN) Zone America/Argentina/Salta -4:21:40 - LMT 1894 Oct 31 -4:16:48 - CMT 1920 May - -4:00 - ART 1930 Dec - -4:00 Arg AR%sT 1969 Oct 5 - -3:00 Arg AR%sT 1991 Mar 3 - -4:00 - WART 1991 Oct 20 - -3:00 Arg AR%sT 1999 Oct 3 - -4:00 Arg AR%sT 2000 Mar 3 - -3:00 Arg AR%sT 2008 Oct 18 - -3:00 - ART + -4:00 - -04 1930 Dec + -4:00 Arg -04/-03 1969 Oct 5 + -3:00 Arg -03/-02 1991 Mar 3 + -4:00 - -04 1991 Oct 20 + -3:00 Arg -03/-02 1999 Oct 3 + -4:00 Arg -04/-03 2000 Mar 3 + -3:00 Arg -03/-02 2008 Oct 18 + -3:00 - -03 # # Tucumán (TM) Zone America/Argentina/Tucuman -4:20:52 - LMT 1894 Oct 31 -4:16:48 - CMT 1920 May - -4:00 - ART 1930 Dec - -4:00 Arg AR%sT 1969 Oct 5 - -3:00 Arg AR%sT 1991 Mar 3 - -4:00 - WART 1991 Oct 20 - -3:00 Arg AR%sT 1999 Oct 3 - -4:00 Arg AR%sT 2000 Mar 3 - -3:00 - ART 2004 Jun 1 - -4:00 - WART 2004 Jun 13 - -3:00 Arg AR%sT + -4:00 - -04 1930 Dec + -4:00 Arg -04/-03 1969 Oct 5 + -3:00 Arg -03/-02 1991 Mar 3 + -4:00 - -04 1991 Oct 20 + -3:00 Arg -03/-02 1999 Oct 3 + -4:00 Arg -04/-03 2000 Mar 3 + -3:00 - -03 2004 Jun 1 + -4:00 - -04 2004 Jun 13 + -3:00 Arg -03/-02 # # La Rioja (LR) Zone America/Argentina/La_Rioja -4:27:24 - LMT 1894 Oct 31 -4:16:48 - CMT 1920 May - -4:00 - ART 1930 Dec - -4:00 Arg AR%sT 1969 Oct 5 - -3:00 Arg AR%sT 1991 Mar 1 - -4:00 - WART 1991 May 7 - -3:00 Arg AR%sT 1999 Oct 3 - -4:00 Arg AR%sT 2000 Mar 3 - -3:00 - ART 2004 Jun 1 - -4:00 - WART 2004 Jun 20 - -3:00 Arg AR%sT 2008 Oct 18 - -3:00 - ART + -4:00 - -04 1930 Dec + -4:00 Arg -04/-03 1969 Oct 5 + -3:00 Arg -03/-02 1991 Mar 1 + -4:00 - -04 1991 May 7 + -3:00 Arg -03/-02 1999 Oct 3 + -4:00 Arg -04/-03 2000 Mar 3 + -3:00 - -03 2004 Jun 1 + -4:00 - -04 2004 Jun 20 + -3:00 Arg -03/-02 2008 Oct 18 + -3:00 - -03 # # San Juan (SJ) Zone America/Argentina/San_Juan -4:34:04 - LMT 1894 Oct 31 -4:16:48 - CMT 1920 May - -4:00 - ART 1930 Dec - -4:00 Arg AR%sT 1969 Oct 5 - -3:00 Arg AR%sT 1991 Mar 1 - -4:00 - WART 1991 May 7 - -3:00 Arg AR%sT 1999 Oct 3 - -4:00 Arg AR%sT 2000 Mar 3 - -3:00 - ART 2004 May 31 - -4:00 - WART 2004 Jul 25 - -3:00 Arg AR%sT 2008 Oct 18 - -3:00 - ART + -4:00 - -04 1930 Dec + -4:00 Arg -04/-03 1969 Oct 5 + -3:00 Arg -03/-02 1991 Mar 1 + -4:00 - -04 1991 May 7 + -3:00 Arg -03/-02 1999 Oct 3 + -4:00 Arg -04/-03 2000 Mar 3 + -3:00 - -03 2004 May 31 + -4:00 - -04 2004 Jul 25 + -3:00 Arg -03/-02 2008 Oct 18 + -3:00 - -03 # # Jujuy (JY) Zone America/Argentina/Jujuy -4:21:12 - LMT 1894 Oct 31 -4:16:48 - CMT 1920 May - -4:00 - ART 1930 Dec - -4:00 Arg AR%sT 1969 Oct 5 - -3:00 Arg AR%sT 1990 Mar 4 - -4:00 - WART 1990 Oct 28 - -4:00 1:00 WARST 1991 Mar 17 - -4:00 - WART 1991 Oct 6 - -3:00 1:00 ARST 1992 - -3:00 Arg AR%sT 1999 Oct 3 - -4:00 Arg AR%sT 2000 Mar 3 - -3:00 Arg AR%sT 2008 Oct 18 - -3:00 - ART + -4:00 - -04 1930 Dec + -4:00 Arg -04/-03 1969 Oct 5 + -3:00 Arg -03/-02 1990 Mar 4 + -4:00 - -04 1990 Oct 28 + -4:00 1:00 -03 1991 Mar 17 + -4:00 - -04 1991 Oct 6 + -3:00 1:00 -02 1992 + -3:00 Arg -03/-02 1999 Oct 3 + -4:00 Arg -04/-03 2000 Mar 3 + -3:00 Arg -03/-02 2008 Oct 18 + -3:00 - -03 # # Catamarca (CT), Chubut (CH) Zone America/Argentina/Catamarca -4:23:08 - LMT 1894 Oct 31 -4:16:48 - CMT 1920 May - -4:00 - ART 1930 Dec - -4:00 Arg AR%sT 1969 Oct 5 - -3:00 Arg AR%sT 1991 Mar 3 - -4:00 - WART 1991 Oct 20 - -3:00 Arg AR%sT 1999 Oct 3 - -4:00 Arg AR%sT 2000 Mar 3 - -3:00 - ART 2004 Jun 1 - -4:00 - WART 2004 Jun 20 - -3:00 Arg AR%sT 2008 Oct 18 - -3:00 - ART + -4:00 - -04 1930 Dec + -4:00 Arg -04/-03 1969 Oct 5 + -3:00 Arg -03/-02 1991 Mar 3 + -4:00 - -04 1991 Oct 20 + -3:00 Arg -03/-02 1999 Oct 3 + -4:00 Arg -04/-03 2000 Mar 3 + -3:00 - -03 2004 Jun 1 + -4:00 - -04 2004 Jun 20 + -3:00 Arg -03/-02 2008 Oct 18 + -3:00 - -03 # # Mendoza (MZ) Zone America/Argentina/Mendoza -4:35:16 - LMT 1894 Oct 31 -4:16:48 - CMT 1920 May - -4:00 - ART 1930 Dec - -4:00 Arg AR%sT 1969 Oct 5 - -3:00 Arg AR%sT 1990 Mar 4 - -4:00 - WART 1990 Oct 15 - -4:00 1:00 WARST 1991 Mar 1 - -4:00 - WART 1991 Oct 15 - -4:00 1:00 WARST 1992 Mar 1 - -4:00 - WART 1992 Oct 18 - -3:00 Arg AR%sT 1999 Oct 3 - -4:00 Arg AR%sT 2000 Mar 3 - -3:00 - ART 2004 May 23 - -4:00 - WART 2004 Sep 26 - -3:00 Arg AR%sT 2008 Oct 18 - -3:00 - ART + -4:00 - -04 1930 Dec + -4:00 Arg -04/-03 1969 Oct 5 + -3:00 Arg -03/-02 1990 Mar 4 + -4:00 - -04 1990 Oct 15 + -4:00 1:00 -03 1991 Mar 1 + -4:00 - -04 1991 Oct 15 + -4:00 1:00 -03 1992 Mar 1 + -4:00 - -04 1992 Oct 18 + -3:00 Arg -03/-02 1999 Oct 3 + -4:00 Arg -04/-03 2000 Mar 3 + -3:00 - -03 2004 May 23 + -4:00 - -04 2004 Sep 26 + -3:00 Arg -03/-02 2008 Oct 18 + -3:00 - -03 # # San Luis (SL) @@ -561,44 +533,44 @@ Rule SanLuis 2007 2008 - Oct Sun>=8 0:00 1:00 S Zone America/Argentina/San_Luis -4:25:24 - LMT 1894 Oct 31 -4:16:48 - CMT 1920 May - -4:00 - ART 1930 Dec - -4:00 Arg AR%sT 1969 Oct 5 - -3:00 Arg AR%sT 1990 - -3:00 1:00 ARST 1990 Mar 14 - -4:00 - WART 1990 Oct 15 - -4:00 1:00 WARST 1991 Mar 1 - -4:00 - WART 1991 Jun 1 - -3:00 - ART 1999 Oct 3 - -4:00 1:00 WARST 2000 Mar 3 - -3:00 - ART 2004 May 31 - -4:00 - WART 2004 Jul 25 - -3:00 Arg AR%sT 2008 Jan 21 - -4:00 SanLuis WAR%sT 2009 Oct 11 - -3:00 - ART + -4:00 - -04 1930 Dec + -4:00 Arg -04/-03 1969 Oct 5 + -3:00 Arg -03/-02 1990 + -3:00 1:00 -02 1990 Mar 14 + -4:00 - -04 1990 Oct 15 + -4:00 1:00 -03 1991 Mar 1 + -4:00 - -04 1991 Jun 1 + -3:00 - -03 1999 Oct 3 + -4:00 1:00 -03 2000 Mar 3 + -3:00 - -03 2004 May 31 + -4:00 - -04 2004 Jul 25 + -3:00 Arg -03/-02 2008 Jan 21 + -4:00 SanLuis -04/-03 2009 Oct 11 + -3:00 - -03 # # Santa Cruz (SC) Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31 - -4:16:48 - CMT 1920 May # Córdoba Mean Time - -4:00 - ART 1930 Dec - -4:00 Arg AR%sT 1969 Oct 5 - -3:00 Arg AR%sT 1999 Oct 3 - -4:00 Arg AR%sT 2000 Mar 3 - -3:00 - ART 2004 Jun 1 - -4:00 - WART 2004 Jun 20 - -3:00 Arg AR%sT 2008 Oct 18 - -3:00 - ART + -4:16:48 - CMT 1920 May + -4:00 - -04 1930 Dec + -4:00 Arg -04/-03 1969 Oct 5 + -3:00 Arg -03/-02 1999 Oct 3 + -4:00 Arg -04/-03 2000 Mar 3 + -3:00 - -03 2004 Jun 1 + -4:00 - -04 2004 Jun 20 + -3:00 Arg -03/-02 2008 Oct 18 + -3:00 - -03 # # Tierra del Fuego, Antártida e Islas del Atlántico Sur (TF) Zone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31 - -4:16:48 - CMT 1920 May # Córdoba Mean Time - -4:00 - ART 1930 Dec - -4:00 Arg AR%sT 1969 Oct 5 - -3:00 Arg AR%sT 1999 Oct 3 - -4:00 Arg AR%sT 2000 Mar 3 - -3:00 - ART 2004 May 30 - -4:00 - WART 2004 Jun 20 - -3:00 Arg AR%sT 2008 Oct 18 - -3:00 - ART + -4:16:48 - CMT 1920 May + -4:00 - -04 1930 Dec + -4:00 Arg -04/-03 1969 Oct 5 + -3:00 Arg -03/-02 1999 Oct 3 + -4:00 Arg -04/-03 2000 Mar 3 + -3:00 - -03 2004 May 30 + -4:00 - -04 2004 Jun 20 + -3:00 Arg -03/-02 2008 Oct 18 + -3:00 - -03 # Aruba Link America/Curacao America/Aruba @@ -608,7 +580,7 @@ Link America/Curacao America/Aruba Zone America/La_Paz -4:32:36 - LMT 1890 -4:32:36 - CMT 1931 Oct 15 # Calamarca MT -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST - -4:00 - BOT # Bolivia Time + -4:00 - -04 # Brazil @@ -960,12 +932,12 @@ Rule Brazil 2038 max - Feb Sun>=15 0:00 0 - # # Fernando de Noronha (administratively part of PE) Zone America/Noronha -2:09:40 - LMT 1914 - -2:00 Brazil FN%sT 1990 Sep 17 - -2:00 - FNT 1999 Sep 30 - -2:00 Brazil FN%sT 2000 Oct 15 - -2:00 - FNT 2001 Sep 13 - -2:00 Brazil FN%sT 2002 Oct 1 - -2:00 - FNT + -2:00 Brazil -02/-01 1990 Sep 17 + -2:00 - -02 1999 Sep 30 + -2:00 Brazil -02/-01 2000 Oct 15 + -2:00 - -02 2001 Sep 13 + -2:00 Brazil -02/-01 2002 Oct 1 + -2:00 - -02 # Other Atlantic islands have no permanent settlement. # These include Trindade and Martim Vaz (administratively part of ES), # Rocas Atoll (RN), and the St Peter and St Paul Archipelago (PE). @@ -978,119 +950,119 @@ Zone America/Noronha -2:09:40 - LMT 1914 # In the north a very small part from the river Javary (now Jari I guess, # the border with Amapá) to the Amazon, then to the Xingu. Zone America/Belem -3:13:56 - LMT 1914 - -3:00 Brazil BR%sT 1988 Sep 12 - -3:00 - BRT + -3:00 Brazil -03/-02 1988 Sep 12 + -3:00 - -03 # # west Pará (PA) # West Pará includes Altamira, Óbidos, Prainha, Oriximiná, and Santarém. Zone America/Santarem -3:38:48 - LMT 1914 - -4:00 Brazil AM%sT 1988 Sep 12 - -4:00 - AMT 2008 Jun 24 0:00 - -3:00 - BRT + -4:00 Brazil -04/-03 1988 Sep 12 + -4:00 - -04 2008 Jun 24 0:00 + -3:00 - -03 # # Maranhão (MA), Piauí (PI), Ceará (CE), Rio Grande do Norte (RN), # Paraíba (PB) Zone America/Fortaleza -2:34:00 - LMT 1914 - -3:00 Brazil BR%sT 1990 Sep 17 - -3:00 - BRT 1999 Sep 30 - -3:00 Brazil BR%sT 2000 Oct 22 - -3:00 - BRT 2001 Sep 13 - -3:00 Brazil BR%sT 2002 Oct 1 - -3:00 - BRT + -3:00 Brazil -03/-02 1990 Sep 17 + -3:00 - -03 1999 Sep 30 + -3:00 Brazil -03/-02 2000 Oct 22 + -3:00 - -03 2001 Sep 13 + -3:00 Brazil -03/-02 2002 Oct 1 + -3:00 - -03 # # Pernambuco (PE) (except Atlantic islands) Zone America/Recife -2:19:36 - LMT 1914 - -3:00 Brazil BR%sT 1990 Sep 17 - -3:00 - BRT 1999 Sep 30 - -3:00 Brazil BR%sT 2000 Oct 15 - -3:00 - BRT 2001 Sep 13 - -3:00 Brazil BR%sT 2002 Oct 1 - -3:00 - BRT + -3:00 Brazil -03/-02 1990 Sep 17 + -3:00 - -03 1999 Sep 30 + -3:00 Brazil -03/-02 2000 Oct 15 + -3:00 - -03 2001 Sep 13 + -3:00 Brazil -03/-02 2002 Oct 1 + -3:00 - -03 # # Tocantins (TO) Zone America/Araguaina -3:12:48 - LMT 1914 - -3:00 Brazil BR%sT 1990 Sep 17 - -3:00 - BRT 1995 Sep 14 - -3:00 Brazil BR%sT 2003 Sep 24 - -3:00 - BRT 2012 Oct 21 - -3:00 Brazil BR%sT 2013 Sep - -3:00 - BRT + -3:00 Brazil -03/-02 1990 Sep 17 + -3:00 - -03 1995 Sep 14 + -3:00 Brazil -03/-02 2003 Sep 24 + -3:00 - -03 2012 Oct 21 + -3:00 Brazil -03/-02 2013 Sep + -3:00 - -03 # # Alagoas (AL), Sergipe (SE) Zone America/Maceio -2:22:52 - LMT 1914 - -3:00 Brazil BR%sT 1990 Sep 17 - -3:00 - BRT 1995 Oct 13 - -3:00 Brazil BR%sT 1996 Sep 4 - -3:00 - BRT 1999 Sep 30 - -3:00 Brazil BR%sT 2000 Oct 22 - -3:00 - BRT 2001 Sep 13 - -3:00 Brazil BR%sT 2002 Oct 1 - -3:00 - BRT + -3:00 Brazil -03/-02 1990 Sep 17 + -3:00 - -03 1995 Oct 13 + -3:00 Brazil -03/-02 1996 Sep 4 + -3:00 - -03 1999 Sep 30 + -3:00 Brazil -03/-02 2000 Oct 22 + -3:00 - -03 2001 Sep 13 + -3:00 Brazil -03/-02 2002 Oct 1 + -3:00 - -03 # # Bahia (BA) # There are too many Salvadors elsewhere, so use America/Bahia instead # of America/Salvador. Zone America/Bahia -2:34:04 - LMT 1914 - -3:00 Brazil BR%sT 2003 Sep 24 - -3:00 - BRT 2011 Oct 16 - -3:00 Brazil BR%sT 2012 Oct 21 - -3:00 - BRT + -3:00 Brazil -03/-02 2003 Sep 24 + -3:00 - -03 2011 Oct 16 + -3:00 Brazil -03/-02 2012 Oct 21 + -3:00 - -03 # # Goiás (GO), Distrito Federal (DF), Minas Gerais (MG), # Espírito Santo (ES), Rio de Janeiro (RJ), São Paulo (SP), Paraná (PR), # Santa Catarina (SC), Rio Grande do Sul (RS) Zone America/Sao_Paulo -3:06:28 - LMT 1914 - -3:00 Brazil BR%sT 1963 Oct 23 0:00 - -3:00 1:00 BRST 1964 - -3:00 Brazil BR%sT + -3:00 Brazil -03/-02 1963 Oct 23 0:00 + -3:00 1:00 -02 1964 + -3:00 Brazil -03/-02 # # Mato Grosso do Sul (MS) Zone America/Campo_Grande -3:38:28 - LMT 1914 - -4:00 Brazil AM%sT + -4:00 Brazil -04/-03 # # Mato Grosso (MT) Zone America/Cuiaba -3:44:20 - LMT 1914 - -4:00 Brazil AM%sT 2003 Sep 24 - -4:00 - AMT 2004 Oct 1 - -4:00 Brazil AM%sT + -4:00 Brazil -04/-03 2003 Sep 24 + -4:00 - -04 2004 Oct 1 + -4:00 Brazil -04/-03 # # Rondônia (RO) Zone America/Porto_Velho -4:15:36 - LMT 1914 - -4:00 Brazil AM%sT 1988 Sep 12 - -4:00 - AMT + -4:00 Brazil -04/-03 1988 Sep 12 + -4:00 - -04 # # Roraima (RR) Zone America/Boa_Vista -4:02:40 - LMT 1914 - -4:00 Brazil AM%sT 1988 Sep 12 - -4:00 - AMT 1999 Sep 30 - -4:00 Brazil AM%sT 2000 Oct 15 - -4:00 - AMT + -4:00 Brazil -04/-03 1988 Sep 12 + -4:00 - -04 1999 Sep 30 + -4:00 Brazil -04/-03 2000 Oct 15 + -4:00 - -04 # # east Amazonas (AM): Boca do Acre, Jutaí, Manaus, Floriano Peixoto # The great circle line from Tabatinga to Porto Acre divides # east from west Amazonas. Zone America/Manaus -4:00:04 - LMT 1914 - -4:00 Brazil AM%sT 1988 Sep 12 - -4:00 - AMT 1993 Sep 28 - -4:00 Brazil AM%sT 1994 Sep 22 - -4:00 - AMT + -4:00 Brazil -04/-03 1988 Sep 12 + -4:00 - -04 1993 Sep 28 + -4:00 Brazil -04/-03 1994 Sep 22 + -4:00 - -04 # # west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant, # Eirunepé, Envira, Ipixuna Zone America/Eirunepe -4:39:28 - LMT 1914 - -5:00 Brazil AC%sT 1988 Sep 12 - -5:00 - ACT 1993 Sep 28 - -5:00 Brazil AC%sT 1994 Sep 22 - -5:00 - ACT 2008 Jun 24 0:00 - -4:00 - AMT 2013 Nov 10 - -5:00 - ACT + -5:00 Brazil -05/-04 1988 Sep 12 + -5:00 - -05 1993 Sep 28 + -5:00 Brazil -05/-04 1994 Sep 22 + -5:00 - -05 2008 Jun 24 0:00 + -4:00 - -04 2013 Nov 10 + -5:00 - -05 # # Acre (AC) Zone America/Rio_Branco -4:31:12 - LMT 1914 - -5:00 Brazil AC%sT 1988 Sep 12 - -5:00 - ACT 2008 Jun 24 0:00 - -4:00 - AMT 2013 Nov 10 - -5:00 - ACT + -5:00 Brazil -05/-04 1988 Sep 12 + -5:00 - -05 2008 Jun 24 0:00 + -4:00 - -04 2013 Nov 10 + -5:00 - -05 # Chile @@ -1343,7 +1315,7 @@ Rule CO 1993 only - Apr 4 0:00 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Bogota -4:56:16 - LMT 1884 Mar 13 -4:56:16 - BMT 1914 Nov 23 # Bogotá Mean Time - -5:00 CO CO%sT # Colombia Time + -5:00 CO -05/-04 # Malpelo, Providencia, San Andres # no information; probably like America/Bogota @@ -1367,7 +1339,7 @@ Zone America/Bogota -4:56:16 - LMT 1884 Mar 13 # # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Curacao -4:35:47 - LMT 1912 Feb 12 # Willemstad - -4:30 - ANT 1965 # Netherlands Antilles Time + -4:30 - -0430 1965 -4:00 - AST # From Arthur David Olson (2011-06-15): @@ -1391,10 +1363,10 @@ Link America/Curacao America/Kralendijk # Caribbean Netherlands # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Guayaquil -5:19:20 - LMT 1890 -5:14:00 - QMT 1931 # Quito Mean Time - -5:00 - ECT # Ecuador Time + -5:00 - -05 Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno - -5:00 - ECT 1986 - -6:00 - GALT # Galápagos Time + -5:00 - -05 1986 + -6:00 - -06 # Falklands @@ -1494,25 +1466,24 @@ Rule Falk 2001 2010 - Sep Sun>=1 2:00 1:00 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Atlantic/Stanley -3:51:24 - LMT 1890 -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time - -4:00 Falk FK%sT 1983 May # Falkland Is Time - -3:00 Falk FK%sT 1985 Sep 15 - -4:00 Falk FK%sT 2010 Sep 5 2:00 - -3:00 - FKST + -4:00 Falk -04/-03 1983 May # Falkland Is Time + -3:00 Falk -03/-02 1985 Sep 15 + -4:00 Falk -04/-03 2010 Sep 5 2:00 + -3:00 - -03 # French Guiana # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Cayenne -3:29:20 - LMT 1911 Jul - -4:00 - GFT 1967 Oct # French Guiana Time - -3:00 - GFT + -4:00 - -04 1967 Oct + -3:00 - -03 # Guyana # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown - -3:45 - GBGT 1966 May 26 # Br Guiana Time - -3:45 - GYT 1975 Jul 31 # Guyana Time - -3:00 - GYT 1991 + -3:45 - -0345 1975 Jul 31 + -3:00 - -03 1991 # IATA SSIM (1996-06) says -4:00. Assume a 1991 switch. - -4:00 - GYT + -4:00 - -04 # Paraguay # @@ -1604,9 +1575,9 @@ Rule Para 2013 max - Mar Sun>=22 0:00 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Asuncion -3:50:40 - LMT 1890 -3:50:40 - AMT 1931 Oct 10 # Asunción Mean Time - -4:00 - PYT 1972 Oct # Paraguay Time - -3:00 - PYT 1974 Apr - -4:00 Para PY%sT + -4:00 - -04 1972 Oct + -3:00 - -03 1974 Apr + -4:00 Para -04/-03 # Peru # @@ -1633,12 +1604,12 @@ Rule Peru 1994 only - Apr 1 0:00 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Lima -5:08:12 - LMT 1890 -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time? - -5:00 Peru PE%sT # Peru Time + -5:00 Peru -05/-04 # South Georgia # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken - -2:00 - GST # South Georgia Time + -2:00 - -02 # South Sandwich Is # uninhabited; scientific personnel have wintered @@ -1648,9 +1619,8 @@ Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken Zone America/Paramaribo -3:40:40 - LMT 1911 -3:40:52 - PMT 1935 # Paramaribo Mean Time -3:40:36 - PMT 1945 Oct # The capital moved? - -3:30 - NEGT 1975 Nov 20 # Dutch Guiana Time - -3:30 - SRT 1984 Oct # Suriname Time - -3:00 - SRT + -3:30 - -0330 1984 Oct + -3:00 - -03 # Trinidad and Tobago # Zone NAME GMTOFF RULES FORMAT [UNTIL] @@ -1756,8 +1726,12 @@ Rule Uruguay 2007 2015 - Mar Sun>=8 2:00 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28 -3:44:44 - MMT 1920 May 1 # Montevideo MT - -3:30 Uruguay UY%sT 1942 Dec 14 # Uruguay Time - -3:00 Uruguay UY%sT + -3:30 Uruguay -0330/-03 1942 Dec 14 + -3:00 Uruguay -03/-02 1968 + -3:00 Uruguay -03/-0230 1971 + -3:00 Uruguay -03/-02 1974 + -3:00 Uruguay -03/-0230 1974 Dec 22 + -3:00 Uruguay -03/-02 # Venezuela # @@ -1791,7 +1765,7 @@ Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28 # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Caracas -4:27:44 - LMT 1890 -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time? - -4:30 - VET 1965 Jan 1 0:00 # Venezuela T. - -4:00 - VET 2007 Dec 9 3:00 - -4:30 - VET 2016 May 1 2:30 - -4:00 - VET + -4:30 - -0430 1965 Jan 1 0:00 + -4:00 - -04 2007 Dec 9 3:00 + -4:30 - -0430 2016 May 1 2:30 + -4:00 - -04 -- 2.7.4

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[PATCH] * Theory: reword to avoid no-longer-used VLAST
by Paul Eggert Dec. 6, 2016

Dec. 6, 2016

--- Theory | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Theory b/Theory index ea4b35d..e40f124 100644 --- a/Theory +++ b/Theory @@ -226,7 +226,7 @@ in decreasing order of importance: for double summer time append 'DST'; etc. Otherwise, take the first three letters of an English place name identifying each zone and append 'T', 'ST', etc. - as before; e.g. 'VLAST' for VLAdivostok Summer Time. + as before; e.g. 'CHAST' for CHAtham Summer Time. Use UT (with time zone abbreviation '-00') for locations while uninhabited. The leading '-' is a flag that the time -- 2.7.4

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Google public NTP servers to 'smear' leap seconds.
by J William Piggott Dec. 5, 2016

Dec. 5, 2016

"For timekeeping purposes, December 31 will seem like any other day." https://cloudplatform.googleblog.com/2016/11/making-every-leap-second-count…

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Zone name policy
by Maksym Besida Dec. 2, 2016

Dec. 2, 2016

Hello, In all versions of TZ data Ukraine zones are named using Russian language transliteration (e.g Europe/Kiev, Europe/Uzhgorod, Europe/Zaporozhye). In *tzdata2016j* in file *europe *it is said *"Kyiv is the transliteration of the Ukrainian name, but "Kiev" is more common in English".* But this is a mistake, because *"more common"* is a very subjective measure and in this case is imposed by russian speaking community which is larger than ukrainian one. Believe that in most groups of Chinese language the mentioned names are pronounced differently from Russian transliteration(even if chinese speaking population is greater than russian one). The official language in Ukraine is Ukrainian, so the proper names of mentioned cities are Kyiv, Uzhhorod and Zaporizhia respectively. Who is responsible for editing this data? -- Regards, Maksym Besida.

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