March 2016 - tz - lists.iana.org

[PATCH 1/1] Add UTC to zone tables
by J William Piggott March 14, 2016

March 14, 2016

* etcetera, zone.tab, zone1970.tab: Create a link to UTC in Europe and add it to the zone tables. --- etcetera | 3 +++ zone.tab | 3 ++- zone1970.tab | 3 ++- 3 files changed, 7 insertions(+), 2 deletions(-) diff --git a/etcetera b/etcetera index c2e2532..745a5e0 100644 --- a/etcetera +++ b/etcetera @@ -12,6 +12,9 @@ Zone Etc/GMT 0 - GMT Zone Etc/UTC 0 - UTC Zone Etc/UCT 0 - UCT +# To facilitate a zone table entry for UTC. +Link Etc/UTC Europe/UTC + # The following link uses older naming conventions, # but it belongs here, not in the file 'backward', # as functions like gmtime load the "GMT" file to handle leap seconds properly. diff --git a/zone.tab b/zone.tab index f7000f7..bf46077 100644 --- a/zone.tab +++ b/zone.tab @@ -180,7 +180,8 @@ FM +0519+16259 Pacific/Kosrae Kosrae FO +6201-00646 Atlantic/Faroe FR +4852+00220 Europe/Paris GA +0023+00927 Africa/Libreville -GB +513030-0000731 Europe/London +GB +513030-0000731 Europe/London Britain (most areas) +GB +512840-0000005 Europe/UTC Britain (Greenwich/GMT/UTC) GD +1203-06145 America/Grenada GE +4143+04449 Asia/Tbilisi GF +0456-05220 America/Cayenne diff --git a/zone1970.tab b/zone1970.tab index 657675f..0c5876e 100644 --- a/zone1970.tab +++ b/zone1970.tab @@ -166,7 +166,8 @@ FM +0658+15813 Pacific/Pohnpei Pohnpei/Ponape FM +0519+16259 Pacific/Kosrae Kosrae FO +6201-00646 Atlantic/Faroe FR +4852+00220 Europe/Paris -GB,GG,IM,JE +513030-0000731 Europe/London +GB,GG,IM,JE +513030-0000731 Europe/London Britain (most areas) +GB +512840-0000005 Europe/UTC Britain (Greenwich/GMT/UTC) GE +4143+04449 Asia/Tbilisi GF +0456-05220 America/Cayenne GH +0533-00013 Africa/Accra

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Chile to return to DST
by Yonathan Dossow March 13, 2016

March 13, 2016

Hi, Chile is returning to implement Daylight Savings Time. Minister Pacheco is telling on the local news that on may 14 Chile will change it's timezone to UTC-4 until the second saturday of august. the rest of the year will be on summer time (UTC-3) I cant find an official decree yet, but here is the info from a news site: http://www.ahoranoticias.cl/chile/santiago/167677-gobierno-repone-el-cambio… regards. -- Yonathan Dossow Fono: +56 32 2654367 Unidad de Infraestructura y Tecnología Departamento de Informática Universidad Técnica Federico Santa María Valparaíso, Chile

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US DST in 1918
by Steve Jones March 13, 2016

March 13, 2016

Apparently DST was important to the United Cigar Stores Company: http://cdn.loc.gov/service/pnp/cph/3g00000/3g08000/3g08100/3g08124v.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/e/e1/Victory-Cigar-Con… Apologies if these have already been shared. Steve Jones OnTimeZone.com

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Chile DST starts again, May 14th
by Cristian Rodríguez March 13, 2016

March 13, 2016

Hi: DST will be back fin Chile, starting the second Saturday of May and ending the Second saturday of August 2016. http://www.latercera.com/noticia/nacional/2016/03/680-672074-9-gobierno-det… Cheers.

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Palestine Summer Time
by Hanna Kreitem March 12, 2016

March 12, 2016

Hello, It was announced that Palestine will move to DST Saturday 26/3, this covers the timezones of Hebron and Gaza. Source: http://www.24fm.ps/ar/news/1457438748 Regards, Hanna.

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Haiti not changing to DST tonight
by Steffen Thorsen March 12, 2016

March 12, 2016

Jean Antoine, editor of www.haiti-reference.com informed us that Haiti are not going on DST this year. Several other resources confirms this, auto-translation under: The Presidency Communication Office informs the general public and the press in particular that no by season time change is planned for this year. Thus, the national time will not be extended or retracted Sunday, March 13, 2016. The Presidential Communications Office invites the public to consider this provision to have no setbacks in his daily activities. http://www.radiotelevisioncaraibes.com/presse/heure_d_t_pas_de_changement_d… http://www.vantbefinfo.com/changement-dheure-pas-pour-haiti/ http://news.anmwe.com/haiti-lheure-nationale-ne-sera-ni-avancee-ni-reculee-… Best regards, Steffen Thorsen - timeanddate.com

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Time zones in the arts
by Arthur David Olson March 11, 2016

March 11, 2016

(I'll forego any comment about the absence of an Oxford comma.) @dashdashado 1.1 531 lines 1.2 538 lines *** /tmp/,atz-art.htm 2016-03-11 09:52:55.639707700 -0500 --- /tmp/,btz-art.htm 2016-03-11 09:52:55.715712200 -0500 *************** *** 451,456 **** --- 451,463 ---- proceeds as though it's also mid-evening there.) </li> </ul> + <li> + In the "14 Days to Go"/"T Minus..." episode of "You, Me and the Apocalypse" + (first aired 2015-11-11 in the UK, 2016-03-10 in the US), + the success of a mission to deal with a comet + hinges on whether or not Russia observes Daylight Saving Time. + (In the US, the episode first aired in the week before the switch to DST.) + </li> <hr> <ul> <li>

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[PATCH 0/5] Standardize zone table comments format
by J William Piggott March 10, 2016

March 10, 2016

Not having a standard format for zone table comments is creating ambiguity. For example: 1 Thule / Pituffik 2 Pohnpei (Ponape) 3 Nova Scotia (peninsula) 4 peninsular Malaysia 5 Eastern Time - Pangnirtung, Nunavut 6 Central Time - Campeche, Yucatán 1 and 2 are different formats for alternate names/spellings. 3 shows a sub-region, but uses the same format as the previous alternate name. 4 places the sub-region before the region, where 3 has it after and uses a different format. 5 and 6 use the same format, but 5 defines a single sub-region while 6 defines two regions. These ambiguities make it impossible to interpret the comments without having prior knowledge of the area. This patch set is an effort to standardize the column 4 comments format as follows: A dash (-) is consistently used to delimit a zone_id prefix, so that was retained. A comma (,) is consistently used to delimit regions, so that was retained. Using a slash (/) to delimit alternate names/spellings is accepted English grammar, so that was chosen. Placing sub-regions after regions facilitates having list items begin in uppercase (which is both aesthetically pleasing and grammatically correct) and improves the usability of a sorted list; so that was chosen. Delimiting sub-regions with with curved braces () is in current practice, so that was chosen. Finally two letter codes for regions/sub-regions are included at the end of the sub-region(s) within the curved braces. Multiple regions grouped with the same sub-region(s) are delimited with a comma between the final region of the group and the sub-region(s). Region sub-region groups are delimited from other regions with a semicolon. At least one zone_id or region must be given. When adding a foreign country code to a zone_id on border locations, add it after the zone_id to accommodate implementations that sort the list. This will group zone_id's together, for example: Mountain Time - Chihuahua (away from US border) Mountain Time US - Chihuahua (near US border) Use full words in favor of abbreviations. This format can be represent as: [zone_id] [-] [region[(sub_region, ... [2_letter_code, ... ])][,|;] ... ] There currently are no zone table comments that model the full specification, so here is an imaginary example of the full spec: Central Scooter Time - Yamaha (YZ); Harley, Davidson, Sprint, (west coast XL, XR, FL, ST); Honda (most locations CB, CR), Suzuki, Kawasaki, Vespa The following changes since commit 99b658c3a129dfd0cb777337575e200656b8ff9d: * NEWS, Theory: Clear up descriptions of tzdata abbreviations. (2016-02-14 12:36:54 -0800) are available in the git repository at: git@github.com:jwpi/tz.git zonetab0215 for you to fetch changes up to cf921321194419bc88104da5d7a3a7cfac0ca47e: Standardize zone table comment format (2016-02-20 11:30:20 -0500) ---------------------------------------------------------------- J William Piggott (5): Holiday Islands does not exist. North of Scoresbysund is named National Park Durango is not a border state Use proper names for Baja California States Standardize zone table comment format australasia | 8 +++ europe | 8 +++ northamerica | 6 +- zone.tab | 240 +++++++++++++++++++++++++++++++-------------------------------- zone1970.tab | 250 +++++++++++++++++++++++++++++++++--------------------------------- 5 files changed, 264 insertions(+), 248 deletions(-) --- 8< Example zone1970.tab comments using the standardized format: Adelaide Island (Rothera Station) Anvers Island (Palmer Station) Holme Bay (Mawson Station) Vestfold Hills (Davis Station) Bailey Peninsula (Casey Station) Lake Vostok (Vostok Station) Adélie Land (Dumont-d'Urville Station) East Ongul Island (Syowa Station) Queen Maud Land (Troll Station) Buenos Aires (BA, CF) Argentina (most locations CB, CC, CN, ER, FM, MN, SE, SF) Salta (SA, LP, NQ, RN) Jujuy (JY) Tucumán (TM) Catamarca (CT), Chubut (CH) La Rioja (LR) San Juan (SJ) Mendoza (MZ) San Luis (SL) Santa Cruz (SC) Tierra del Fuego (TF) Samoa, Midway Lord Howe Island Macquarie Island Tasmania (most locations) Tasmania (King Island) Victoria New South Wales (most locations) New South Wales (Yancowinna) Queensland (most locations) Queensland (Whitsunday Islands) South Australia Northern Territory Western Australia (most locations) Western Australia (Eucla) Atlantic islands Pará (east), Amapá Northeast Brazil (MA, PI, CE, RN, PB) Pernambuco Tocantins Alagoas, Sergipe Bahia South Brazil, Southeast Brazil, (GO, DF, MG, ES, RJ, SP, PR, SC, RS) Mato Grosso do Sul Mato Grosso Pará (west) Rondônia Roraima Amazonas (east) Amazonas (west) Acre Newfoundland, Labrador (southeast) Atlantic Time - Nova Scotia (peninsula), Prince Edward Island Atlantic Time - Nova Scotia (Cape Breton) Atlantic Time - New Brunswick Atlantic Time - Labrador (most locations) Atlantic Standard Time - Quebec (Lower North Shore) Eastern Time - Ontario, Quebec, (most locations) Eastern Time - Ontario, Quebec, (places that did not observe DST 1967-1973) Eastern Time - Ontario (Thunder Bay) Eastern Time - Nunavut (most eastern locations) Eastern Time - Nunavut (Pangnirtung) Central Time - Nunavut (Resolute) Eastern Standard Time - Ontario (Atikokan), Nunavut (Southampton Island) Central Time - Nunavut (central) Central Time - Ontario (west), Manitoba Central Time - Ontario (Rainy River, Fort Frances) Central Standard Time - Saskatchewan (most locations) Central Standard Time - Saskatchewan (midwest) Mountain Time - Alberta, British Columbia (east), Saskatchewan (west) Mountain Time - Nunavut (west) Mountain Time - Northwest Territories (central) Mountain Time - Northwest Territories (west) Mountain Standard Time - British Columbia (Creston) Mountain Standard Time - British Columbia (Dawson Creek, Fort Saint John) Mountain Standard Time - British Columbia (Fort Nelson) Pacific Time - British Columbia (west) Pacific Time - Yukon (south) Pacific Time - Yukon (north) Swiss Time Chile (most locations) Easter Island Beijing Time Xinjiang Time Germany (most locations) Ecuador (mainland) Galápagos Islands Spain (mainland) Ceuta, Melilla Canary Islands Chuuk/Truk, Yap Pohnpei/Ponape Kosrae Greenland (most locations) National Park (east coast) Scoresbysund/Ittoqqortoormiit Thule/Pituffik Java, Sumatra Borneo (west, central) Borneo (east, south), Sulawesi (Celebes), Bali, Nusa Tengarra, Timor (west) New Guinea (West Papua / Irian Jaya), Maluku/Moluccas Gilbert Islands Phoenix Islands Line Islands Kazakhstan (most locations) Qyzylorda/Kyzylorda/Kzyl-Orda Aqtobe/Aktobe Atyrau/Atirau/Gur'yev, Mangghystau/Mankistau West Kazakhstan Marshall Islands (most locations) Kwajalein Mongolia (most locations) Bayan-Ölgii, Govi-Altai, Hovd, Uvs, Zavkhan Dornod, Sükhbaatar Central Time Eastern Standard Time - Quintana Roo Central Time - Campeche, Yucatán Central Time - Durango; Coahuila, Nuevo León, Tamaulipas, (away from US border) Central Time US - Coahuila, Nuevo León, Tamaulipas, (near US border) Mountain Time - Baja California Sur, Nayarit, Sinaloa Mountain Time - Chihuahua (away from US border) Mountain Time US - Chihuahua (near US border) Mountain Standard Time - Sonora Pacific Time US - Baja California Central Time - Bahía de Banderas Malaysia (peninsula) Sabah, Sarawak UTC+2 - Central Africa Time UTC+1 - West Africa Time New Zealand Time Chatham Islands Society Islands Marquesas Islands Gambier Islands Papua New Guinea (most locations) Bougainville Gaza Strip West Bank Portugal (mainland) Madeira Islands Azores Réunion Island, Crozet Islands, Scattered Islands Moscow-01 - Kaliningrad Moscow+00 - Russia (west) Moscow+00 - Crimea Moscow+00 - Caspian Sea Moscow+01 - Samara, Udmurtia Moscow+02 - Urals Moscow+03 - Siberia (west) Moscow+03 - Novosibirsk Moscow+04 - Kemerovo Moscow+04 - Yenisei River Moscow+05 - Lake Baikal Moscow+05 - Zabaykalsky Moscow+06 - Lena River Moscow+06 - Tomponsky, Ust-Maysky Moscow+07 - Amur River Moscow+07 - Sakhalin Island Moscow+07 - Oymyakonsky Moscow+07 - Magadan Moscow+08 - Sakha (east), North Kuril Islands Moscow+09 - Kamchatka Moscow+09 - Bering Sea Kerguelen, St Paul Island, Amsterdam Island Indochina (most locations) Ukraine (most locations) Ruthenia Zaporozh'ye/Zaporizhia, Lugansk/Luhansk (east) Wake Island Eastern Time Eastern Time - Michigan (most locations) Eastern Time - Kentucky (Louisville area) Eastern Time - Kentucky (Wayne) Eastern Time - Indiana (most locations) Eastern Time - Indiana (Daviess, Dubois, Knox, Martin) Eastern Time - Indiana (Pulaski) Eastern Time - Indiana (Crawford) Eastern Time - Indiana (Pike) Eastern Time - Indiana (Switzerland) Central Time Central Time - Indiana (Perry) Central Time - Indiana (Starke) Central Time - Michigan (Dickinson, Gogebic, Iron, Menominee) Central Time - North Dakota (Oliver) Central Time - North Dakota (Morton except Mandan area) Central Time - North Dakota (Mercer) Mountain Time Mountain Time - Idaho (south), Oregon (east) Mountain Standard Time - Arizona (except Navajo) Pacific Time Alaska Time Alaska Time - Alaska Panhandle Alaska Time - Alaska Panhandle (southeast) Alaska Time - Annette Island Alaska Time - Alaska Panhandle (neck) Alaska Time - Alaska (west) Aleutian Islands Hawaii Time Uzbekistan (west) Uzbekistan (east) Vietnam (south)

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zic changes (2/2)
by Arthur David Olson March 9, 2016

March 9, 2016

And now, the update. These changes arrange things so that binary files include "transition" entries for minimum time values; these entries eliminate localtime guesswork in handling low-valued time stamps. The bad news: binary files grow slightly as a result of these changes. The good news: there are no changes in the output of "zdump -v" applied to before-and-after versions of all the binary files generated by a "make install." Changes are attached and appear in mangled form below; these are relative to the github version of zic.c after the rollback in the earlier message today. @dashdashado 1.2 2805 lines 1.4 2813 lines *** /tmp/,azic.c 2014-05-01 01:51:36.998933800 -0400 --- /tmp/,bzic.c 2014-05-01 01:51:37.092534000 -0400 *************** *** 1480,1493 **** fromi = 0; while (fromi < timecnt && attypes[fromi].at < min_time) ++fromi; - if (isdsts[0] == 0) - while (fromi < timecnt && attypes[fromi].type == 0) - ++fromi; /* handled by default rule */ for ( ; fromi < timecnt; ++fromi) { ! if (toi != 0 && ((attypes[fromi].at + gmtoffs[attypes[toi - 1].type]) <= ! (attypes[toi - 1].at + gmtoffs[toi == 1 ? 0 ! : attypes[toi - 2].type]))) { attypes[toi - 1].type = attypes[fromi].type; continue; --- 1480,1490 ---- fromi = 0; while (fromi < timecnt && attypes[fromi].at < min_time) ++fromi; for ( ; fromi < timecnt; ++fromi) { ! if (toi > 1 && ((attypes[fromi].at + gmtoffs[attypes[toi - 1].type]) <= ! (attypes[toi - 1].at + ! gmtoffs[attypes[toi - 2].type]))) { attypes[toi - 1].type = attypes[fromi].type; continue; *************** *** 1532,1537 **** --- 1529,1541 ---- --timecnt32; ++timei32; } + /* + ** Output an INT32_MIN "transition" if appropriate--see below. + */ + if (timei32 > 0 && ats[timei32] > INT32_MIN) { + --timei32; + ++timecnt32; + } while (leapcnt32 > 0 && !is32(trans[leapcnt32 - 1])) --leapcnt32; while (leapcnt32 > 0 && !is32(trans[leapi32])) { *************** *** 1698,1704 **** #undef DO for (i = thistimei; i < thistimelim; ++i) if (pass == 1) ! puttzcode(ats[i], fp); else puttzcode64(ats[i], fp); for (i = thistimei; i < thistimelim; ++i) { unsigned char uc; --- 1702,1713 ---- #undef DO for (i = thistimei; i < thistimelim; ++i) if (pass == 1) ! /* ! ** Output an INT32_MIN "transition" ! ** if appropriate--see above. ! */ ! puttzcode(((ats[i] < INT32_MIN) ? ! INT32_MIN : ats[i]), fp); else puttzcode64(ats[i], fp); for (i = thistimei; i < thistimelim; ++i) { unsigned char uc; *************** *** 2176,2183 **** if (usestart) { addtt(starttime, type); usestart = FALSE; ! } else if (stdoff != 0) ! addtt(min_time, type); } else for (year = min_year; year <= max_year; ++year) { if (useuntil && year > zp->z_untilrule.r_hiyear) break; --- 2185,2191 ---- if (usestart) { addtt(starttime, type); usestart = FALSE; ! } else addtt(min_time, type); } else for (year = min_year; year <= max_year; ++year) { if (useuntil && year > zp->z_untilrule.r_hiyear) break;

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YouTube videos on time zones
by Matt Johnson March 8, 2016

March 8, 2016

If these two aren't in our art file, they probably should be. "Daylight Saving Time Explained" - CGP Grey https://youtu.be/84aWtseb2-4 Among other things, explains Arizona's enclaves and exclaves quite well. "The Problem with Time & Timezones" - Computerphile / Tom Scott https://youtu.be/-5wpm-gesOY Though Tom gets Nepal's time zone offset wrong - can you blame him?

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