tz

Download

tz@iana.org

March 2012

62 participants
42 discussions

Proposed time zone package changes (Armenia, Chile, Falklands, Tokelau, Antarctica, Creston(Canada))
by Robert Elz March 1, 2012

March 1, 2012

Here are proposed changes to the time zone package (code & data). These will be released as tz*2012a.tar.gz on Thursday March 1 2012 assuming no problems are found (and if only minor problems are found, and corrected, then something similar on the same date.) The executive summary tzcode: updates to reflect the current homes of the mailing list and distribution files (no changes to the C code at all in this version, unless you need the README or .htm files, you do not need this update.) Note: I have used munnari.oz.au as the primary home for the tz*.tar.gz files as (for now anyway) that is where it is, if the primary source moves to the IANA systems in the future this can be updated. tzdata: antarctica current best known timezone info for various antarctic bases for the winter of 2012 asia Armenia has abolished summer time australasia Tokelau copied Samoa and swapped sides of the International Data line last December. NB: this change affects current timestamps. europe Spelling corrections for some French names in comments. leapseconds Bulletin C43 incorporated (a leap Second will occur 2012-06-30 at 23:59:60 UTC) Bulletin C42 was also incorporated (but never released) - it said nothing very interesting (no leap second 2011-12-31). northamerica New zone America/Creston created for an area in British Columbia that was previously (and apparently incorrectly) considered identical to Dawson Creek. Also, some corrections to 1918 summer time end dates in several Canadian zones. southamerica Chile has extended Summer time in the 2011/2 summer. The Falkland Islands now have it permanently (continuing the 2011 experiment.) This "permanently" is a guess, it apparently is certain for 2012 (as certain as these things ever are) and considered likely into the future. zone.tab New America/Creston zone added, and a typo in the entry for Europe/Samara corrected. Please let us (via the list, or for trivia if you prefer, to me personally) of any problems with any of these changes. I'd particularly appreciate someone (many someone's...) casting an eye over the change to the Falklands zone definition (Atlantic/Stanley) to see if you agree with the way I made that change. If there were any doc changes I missed (any remaining references to elsie.... for example) please let me know. kre --- README 2012/02/25 03:44:34 1.1 +++ README 2012/02/26 22:37:09 @@ -1,4 +1,4 @@ -@(#)README 8.3 +@(#)README 8.4 This file is in the public domain, so clarified as of 2009-05-17 by Arthur David Olson. @@ -40,7 +40,7 @@ mkdir tz cd tz - wget 'ftp://elsie.nci.nih.gov/pub/tz*.tar.gz' + wget 'ftp://munnari.oz.au/pub/tz*.tar.gz' gzip -dc tzcode*.tar.gz | tar -xf - gzip -dc tzdata*.tar.gz | tar -xf - @@ -71,7 +71,7 @@ 1970, and there are undoubtedly errors even for time stamps since 1970. If you know that the rules are different from those in a file, by all means feel free to change file (and please send the changed version to -tz(a)elsie.nci.nih.gov for use in the future). Europeans take note! +tz(a)iana.org for use in the future). Europeans take note! Thanks to these Timezone Caballeros who've made major contributions to the time conversion package: Keith Bostic; Bob Devine; Paul Eggert; Robert Elz; @@ -80,7 +80,13 @@ for testing work, and to Gwillim Law for checking local mean time data. None of them are responsible for remaining errors. -Look in the ~ftp/pub directory of elsie.nci.nih.gov +Look in the ~ftp/pub directory of munnari.oz.au for updated versions of these files. -Please send comments or information to tz(a)elsie.nci.nih.gov. +Please send comments or information to tz(a)iana.org. + +Postscript: The README above is largely unmodified (aside from details +of mailing list and ftp archive addresses) from that prepared many years +ago by Arthur David Olson, to whom the timezone community owes the +greatest debt of all. Arthur is not currently maintaining this data or +code (though he remains involved). --- tz-art.htm 2012/02/25 03:47:12 1.1 +++ tz-art.htm 2012/02/26 23:38:50 @@ -9,7 +9,7 @@ <body> <h1>Time and the Arts</h1> <address> -(a)(#)tz-art.htm 8.20 +(a)(#)tz-art.htm 8.21 </address> <p> This file is in the public domain, so clarified as of @@ -17,7 +17,7 @@ </p> <p> Please send corrections to this web page to the -<a href="mailto:tz@elsie.nci.nih.gov">time zone mailing list</a>.</p> +<a href="mailto:tz@iana.org">time zone mailing list</a>.</p> <p> See also <a href="tz-link.htm">Sources for Time Zone and Daylight Saving Time Data</a>.</p> <hr> --- tz-link.htm 2012/02/25 03:47:12 1.1 +++ tz-link.htm 2012/02/26 23:38:58 @@ -18,7 +18,7 @@ <body> <h1>Sources for Time Zone and Daylight Saving Time Data</h1> <address> -(a)(#)tz-link.htm 8.32 +(a)(#)tz-link.htm 8.33 </address> <p> This file is in the public domain, so clarified as of @@ -26,7 +26,7 @@ </p> <p> Please send corrections to this web page to the -<a href="mailto:tz@elsie.nci.nih.gov">time zone mailing list</a>.</p> +<a href="mailto:tz@iana.org">time zone mailing list</a>.</p> <h2>The <code>tz</code> database</h2> <p> The <a href="http://en.wikipedia.org/wiki/Public_domain">public-domain</a> @@ -83,7 +83,7 @@ the location's full name, e.g., <code>TZ="America/New_York"</code>.</p> <p> In the <code>tz</code> database's -<a href="ftp://elsie.nci.nih.gov/pub"><abbr +<a href="ftp://munnari.oz.au/pub"><abbr title="File Transfer Protocol">FTP</abbr> distribution</a> the code is in the file <code>tzcode<var>C</var>.tar.gz</code>, where <code><var>C</var></code> is the code's version; @@ -98,25 +98,30 @@ <code>README</code> file for what to do next.</p> <pre style="margin-left: 2em"><code>mkdir tz cd tz -<a href="http://www.gnu.org/software/wget/">wget</a> 'ftp://elsie.nci.nih.gov/pub/tz*.tar.gz' +<a href="http://www.gnu.org/software/wget/">wget</a> 'ftp://munnari.oz.au/pub/tz*.tar.gz' <a href="http://www.gnu.org/software/gzip/">gzip</a> -dc tzcode*.tar.gz | <a href="http://www.gnu.org/software/tar/">tar</a> -xf - gzip -dc tzdata*.tar.gz | tar -xf - </code></pre> <p> +The code and data files can also be obtained from the +<a href="http:www.iana.org">IANA</a> +<a href="http://www.iana.org/time-zones">timezone web page</a>. +<p> The code lets you compile the <code>tz</code> source files into machine-readable binary files, one for each location. It also lets you read a <code>tz</code> binary file and interpret time stamps for that location.</p> <p> The data are by no means authoritative. If you find errors, please -send changes to the <a href="mailto:tz@elsie.nci.nih.gov">time zone +send changes to the <a href="mailto:tz@iana.org">time zone mailing list</a>. You can also <a href="http://news.gmane.org/gmane.comp.time.tz">browse recent messages</a> sent to the mailing list, <a -href="mailto:tz-request@elsie.nci.nih.gov">subscribe</a> to it, -retrieve the <a -href="ftp://elsie.nci.nih.gov/pub/tzarchive.gz">full archive of old -messages</a> (in gzip compressed format), or retrieve <a +href="https://mm.icann.org/mailman/listinfo/tz">subscribe</a> to it. +browse the <a +href="http://mm.icann.org/pipermail/tz/">archive of old +messages</a> (message by message or in gzip compressed format), +or retrieve <a href="ftp://munnari.oz.au/pub/oldtz">archived older versions of code and data</a>.</p> <p> --- antarctica 2011/10/07 06:09:10 1.1 +++ antarctica 2012/02/26 23:03:41 @@ -1,5 +1,5 @@ # <pre> -# @(#)antarctica 8.9 +# @(#)antarctica 8.10 # This file is in the public domain, so clarified as of # 2009-05-17 by Arthur David Olson. @@ -42,8 +42,19 @@ Rule ChileAQ 1998 only - Mar Sun>=9 3:00u 0 - Rule ChileAQ 1998 only - Sep 27 4:00u 1:00 S Rule ChileAQ 1999 only - Apr 4 3:00u 0 - -Rule ChileAQ 1999 max - Oct Sun>=9 4:00u 1:00 S -Rule ChileAQ 2000 max - Mar Sun>=9 3:00u 0 - +Rule ChileAQ 1999 2010 - Oct Sun>=9 4:00u 1:00 S +Rule ChileAQ 2000 2007 - Mar Sun>=9 3:00u 0 - +# N.B.: the end of March 29 in Chile is March 30 in Universal time, +# which is used below in specifying the transition. +Rule ChileAQ 2008 only - Mar 30 3:00u 0 - +Rule ChileAQ 2009 only - Mar Sun>=9 3:00u 0 - +Rule ChileAQ 2010 only - Apr Sun>=1 3:00u 0 - +Rule ChileAQ 2011 only - May Sun>=2 3:00u 0 - +Rule ChileAQ 2011 only - Aug Sun>=16 4:00u 1:00 S +Rule ChileAQ 2012 only - Apr Sun>=23 3:00u 0 - +Rule ChileAQ 2012 only - Sep Sun>=2 4:00u 1:00 S +Rule ChileAQ 2013 max - Mar Sun>=9 3:00u 0 - +Rule ChileAQ 2013 max - Oct Sun>=9 4:00u 1:00 S # These rules are stolen from the `australasia' file. Rule AusAQ 1917 only - Jan 1 0:01 1:00 - @@ -142,12 +153,16 @@ # Western (Aus) Standard Time 11:00 - CAST 2010 Mar 5 2:00 # Casey Time + 8:00 - WST 2011 Oct 28 2:00 + 11:00 - CAST 2012 Feb 21 17:00u 8:00 - WST Zone Antarctica/Davis 0 - zzz 1957 Jan 13 7:00 - DAVT 1964 Nov # Davis Time 0 - zzz 1969 Feb 7:00 - DAVT 2009 Oct 18 2:00 5:00 - DAVT 2010 Mar 10 20:00u + 7:00 - DAVT 2011 Oct 28 2:00 + 5:00 - DAVT 2012 Feb 21 20:00u 7:00 - DAVT Zone Antarctica/Mawson 0 - zzz 1954 Feb 13 6:00 - MAWT 2009 Oct 18 2:00 --- asia 2011/10/15 03:19:42 1.4 +++ asia 2012/02/26 23:05:26 @@ -1,4 +1,4 @@ -# @(#)asia 8.69 +# @(#)asia 8.70 # This file is in the public domain, so clarified as of # 2009-05-17 by Arthur David Olson. @@ -77,10 +77,6 @@ Rule RussiaAsia 1993 1995 - Sep lastSun 2:00s 0 - Rule RussiaAsia 1996 max - Oct lastSun 2:00s 0 - -# From Arthur David Olson (2011-06-15): -# While Russia abandoned DST in 2011, Armenia may choose to -# follow Russia's "old" rules. - # Afghanistan # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Asia/Kabul 4:36:48 - LMT 1890 @@ -97,6 +93,21 @@ # in 1996, though it did use DST in 1995. IATA SSIM (1991/1998) reports that # Armenia switched from 3:00 to 4:00 in 1998 and observed DST after 1991, # but started switching at 3:00s in 1998. + +# From Arthur David Olson (2011-06-15): +# While Russia abandoned DST in 2011, Armenia may choose to +# follow Russia's "old" rules. + +# From Alexander Krivenyshev (2012-02-10): +# According to News Armenia, on Feb 9, 2012, +# http://newsarmenia.ru/society/20120209/42609695.html +# +# The Armenia National Assembly adopted final reading of Amendments to the +# Law "On procedure of calculation time on the territory of the Republic of +# Armenia" according to which Armenia [is] abolishing Daylight Saving Time. +# or +# (brief) +# http://www.worldtimezone.com/dst_news/dst_news_armenia03.html # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Asia/Yerevan 2:58:00 - LMT 1924 May 2 3:00 - YERT 1957 Mar # Yerevan Time @@ -104,7 +115,8 @@ 3:00 1:00 YERST 1991 Sep 23 # independence 3:00 RussiaAsia AM%sT 1995 Sep 24 2:00s 4:00 - AMT 1997 - 4:00 RussiaAsia AM%sT + 4:00 RussiaAsia AM%sT 2012 Mar 25 2:00s + 4:00 - AMT # Azerbaijan # From Rustam Aliyev of the Azerbaijan Internet Forum (2005-10-23): --- australasia 2011/10/31 06:47:12 1.5 +++ australasia 2012/02/26 23:07:14 @@ -1,5 +1,5 @@ # <pre> -# @(#)australasia 8.29 +# @(#)australasia 8.30 # This file is in the public domain, so clarified as of # 2009-05-17 by Arthur David Olson. @@ -616,6 +616,11 @@ # Dateline Change skip Friday 30th Dec 2011 # Thursday 29th December 2011 23:59:59 Hours # Saturday 31st December 2011 00:00:00 Hours +# +# Clarification by Tim Parenti (2012-01-03): +# Although Samoa has used Daylight Saving Time in the 2010-2011 and 2011-2012 +# seasons, there is not yet any indication that this trend will continue on +# a regular basis. For now, we have explicitly listed the transitions below. Zone Pacific/Apia 12:33:04 - LMT 1879 Jul 5 -11:26:56 - LMT 1911 -11:30 - SAMT 1950 # Samoa Time @@ -633,9 +638,28 @@ 11:00 - SBT # Solomon Is Time # Tokelau Is +# +# From Gwillim Law (2011-12-29) +# A correspondent informed me that Tokelau, like Samoa, will be skipping +# December 31 this year, thereby changing its time zone from UTC-10 to +# UTC+14. When I tried to verify this statement, I found a confirming +# article in Time magazine online +# <a href="http://www.time.com/time/world/article/0,8599,2103243,00.html"> +# (http://www.time.com/time/world/article/0,8599,2103243,00.html) +# </a> +# +# From Jonathan Leffler (2011-12-29) +# Information from the BBC to the same effect: +# <a href="http://www.bbc.co.uk/news/world-asia-16351377"> +# http://www.bbc.co.uk/news/world-asia-16351377 +# </a> +# +# Patch supplied by Tim Parenti (2011-12-29) + # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Pacific/Fakaofo -11:24:56 - LMT 1901 - -10:00 - TKT # Tokelau Time + -10:00 - TKT 2011 Dec 30 # Tokelau Time + 14:00 - TKT # Tonga # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S --- europe 2011/10/31 06:48:42 1.3 +++ europe 2012/02/26 23:08:49 @@ -1,5 +1,5 @@ # <pre> -# @(#)europe 8.40 +# @(#)europe 8.41 # This file is in the public domain, so clarified as of # 2009-05-17 by Arthur David Olson. @@ -211,9 +211,15 @@ # the history of summer time legislation in the United Kingdom. # Since 1998 Joseph S. Myers has been updating # and extending this list, which can be found in -# <a href="http://student.cusu.cam.ac.uk/~jsm28/british-time/"> +# http://student.cusu.cam.ac.uk/~jsm28/british-time/ +# <a href="http://www.polyomino.org.uk/british-time/"> # History of legal time in Britain # </a> +# Rob Crowther (2012-01-04) reports that that URL no longer +# exists, and the article can now be found at: +# <a href="http://www.polyomino.org.uk/british-time/"> +# http://www.polyomino.org.uk/british-time/ +# </a> # From Joseph S. Myers (1998-01-06): # @@ -1150,11 +1156,11 @@ # The French rules for 1941-1944 were not used in Paris, but Shanks & Pottenger # write that they were used in Monaco and in many French locations. # Le Corre writes that the upper limit of the free zone was Arneguy, Orthez, -# Mont-de-Marsan, Bazas, Langon, Lamotte-Montravel, Marouil, La -# Rochefoucault, Champagne-Mouton, La Roche-Posay, La Haye-Decartes, +# Mont-de-Marsan, Bazas, Langon, Lamothe-Montravel, Mareuil, La +# Rochefoucauld, Champagne-Mouton, La Roche-Posay, La Haye-Decartes, # Loches, Montrichard, Vierzon, Bourges, Moulins, Digoin, -# Paray-le-Monial, Montceau-les-Mines, Chalons-sur-Saone, Arbois, -# Dole, Morez, St-Claude, and Collognes (Haute-Savioe). +# Paray-le-Monial, Montceau-les-Mines, Chalon-sur-Saone, Dole, Arbois, +# Morez, St-Claude, and Collognes (Haute-Savioe). Rule France 1941 only - May 5 0:00 2:00 M # Midsummer # Shanks & Pottenger say this transition occurred at Oct 6 1:00, # but go with Denis Excoffier (1997-12-12), --- leapseconds 2011/10/07 06:09:10 1.1 +++ leapseconds 2012/01/06 11:37:49 @@ -1,5 +1,5 @@ # <pre> -# @(#)leapseconds 8.11 +# @(#)leapseconds 8.13 # This file is in the public domain, so clarified as of # 2009-05-17 by Arthur David Olson. @@ -48,40 +48,54 @@ Leap 1998 Dec 31 23:59:60 + S Leap 2005 Dec 31 23:59:60 + S Leap 2008 Dec 31 23:59:60 + S +Leap 2012 Jun 30 23:59:60 + S # INTERNATIONAL EARTH ROTATION AND REFERENCE SYSTEMS SERVICE (IERS) # # SERVICE INTERNATIONAL DE LA ROTATION TERRESTRE ET DES SYSTEMES DE REFERENCE # +# # SERVICE DE LA ROTATION TERRESTRE # OBSERVATOIRE DE PARIS # 61, Av. de l'Observatoire 75014 PARIS (France) -# Tel. : 33 (0) 1 40 51 22 29 +# Tel. : 33 (0) 1 40 51 22 26 # FAX : 33 (0) 1 40 51 22 91 -# Internet : services.iers(a)obspm.fr +# e-mail : (E-Mail Removed) +# http://hpiers.obspm.fr/eop-pc +# +# Paris, 5 January 2012 # -# Paris, 2 February 2011 # -# Bulletin C 41 +# Bulletin C 43 # # To authorities responsible # for the measurement and # distribution of time # -# INFORMATION ON UTC - TAI # -# NO positive leap second will be introduced at the end of June 2011. -# The difference between Coordinated Universal Time UTC and the -# International Atomic Time TAI is : +# UTC TIME STEP +# on the 1st of July 2012 +# # -# from 2009 January 1, 0h UTC, until further notice : UTC-TAI = -34 s +# A positive leap second will be introduced at the end of June 2012. +# The sequence of dates of the UTC second markers will be: +# +# 2012 June 30, 23h 59m 59s +# 2012 June 30, 23h 59m 60s +# 2012 July 1, 0h 0m 0s +# +# The difference between UTC and the International Atomic Time TAI is: +# +# from 2009 January 1, 0h UTC, to 2012 July 1 0h UTC : UTC-TAI = - 34s +# from 2012 July 1, 0h UTC, until further notice : UTC-TAI = - 35s # # Leap seconds can be introduced in UTC at the end of the months of December -# or June, depending on the evolution of UT1-TAI. Bulletin C is mailed every -# six months, either to announce a time step in UTC, or to confirm that there +# or June, depending on the evolution of UT1-TAI. Bulletin C is mailed every +# six months, either to announce a time step in UTC or to confirm that there # will be no time step at the next possible date. # +# # Daniel GAMBIS -# Head -# Earth Orientation Center of the IERS +# Head +# Earth Orientation Center of IERS # Observatoire de Paris, France --- northamerica 2011/10/31 06:49:15 1.4 +++ northamerica 2012/01/06 12:09:57 @@ -1,5 +1,5 @@ # <pre> -# @(#)northamerica 8.51 +# @(#)northamerica 8.52 # This file is in the public domain, so clarified as of # 2009-05-17 by Arthur David Olson. @@ -1120,9 +1120,26 @@ # For now, assume all of DST-observing Canada will fall into line with the # new US DST rules, +# From Chris Walton (2011-12-01) +# In the first of Tammy Hardwick's articles +# <a href="http://www.ilovecreston.com/?p=articles&t=spec&ar=260"> +# http://www.ilovecreston.com/?p=articles&t=spec&ar=260 +# </a> +# she quotes the Friday November 1/1918 edition of the Creston Review. +# The quote includes these two statements: +# 'Sunday the CPR went back to the old system of time...' +# '... The daylight saving scheme was dropped all over Canada at the same time,' +# These statements refer to a transition from daylight time to standard time +# that occurred nationally on Sunday October 27/1918. This transition was +# also documented in the Saturday October 26/1918 edition of the Toronto Star. + +# In light of that evidence, we alter the date from the earlier believed +# Oct 31, to Oct 27, 1918 (and Sunday is a more likely transition day +# than Thursday) in all Canadian rulesets. + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Canada 1918 only - Apr 14 2:00 1:00 D -Rule Canada 1918 only - Oct 31 2:00 0 S +Rule Canada 1918 only - Oct 27 2:00 0 S Rule Canada 1942 only - Feb 9 2:00 1:00 W # War Rule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace Rule Canada 1945 only - Sep 30 2:00 0 S @@ -1645,7 +1662,7 @@ Rule Winn 1916 only - Apr 23 0:00 1:00 D Rule Winn 1916 only - Sep 17 0:00 0 S Rule Winn 1918 only - Apr 14 2:00 1:00 D -Rule Winn 1918 only - Oct 31 2:00 0 S +Rule Winn 1918 only - Oct 27 2:00 0 S Rule Winn 1937 only - May 16 2:00 1:00 D Rule Winn 1937 only - Sep 26 2:00 0 S Rule Winn 1942 only - Feb 9 2:00 1:00 W # War @@ -1728,7 +1745,7 @@ # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Regina 1918 only - Apr 14 2:00 1:00 D -Rule Regina 1918 only - Oct 31 2:00 0 S +Rule Regina 1918 only - Oct 27 2:00 0 S Rule Regina 1930 1934 - May Sun>=1 0:00 1:00 D Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D @@ -1765,7 +1782,7 @@ # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D -Rule Edm 1918 only - Oct 31 2:00 0 S +Rule Edm 1918 only - Oct 27 2:00 0 S Rule Edm 1919 only - May 27 2:00 0 S Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D Rule Edm 1920 only - Oct lastSun 2:00 0 S @@ -1795,9 +1812,59 @@ # Dawson Creek uses MST. Much of east BC is like Edmonton. # Matthews and Vincent (1998) write that Creston is like Dawson Creek. +# It seems though that (re: Creston) is not entirely correct: + +# From Chris Walton (2011-12-01): +# There are two areas within the Canadian province of British Columbia +# that do not currently observe daylight saving: +# a) The Creston Valley (includes the town of Creston and surrounding area) +# b) The eastern half of the Peace River Regional District +# (includes the cities of Dawson Creek and Fort St. John) + +# Earlier this year I stumbled across a detailed article about the time +# keeping history of Creston; it was written by Tammy Hardwick who is the +# manager of the Creston & District Museum. The article was written in May 2009. +# <a href="http://www.ilovecreston.com/?p=articles&t=spec&ar=260"> +# http://www.ilovecreston.com/?p=articles&t=spec&ar=260 +# </a> +# According to the article, Creston has not changed its clocks since June 1918. +# i.e. Creston has been stuck on UTC-7 for 93 years. +# Dawson Creek, on the other hand, changed its clocks as recently as April 1972. + +# Unfortunately the exact date for the time change in June 1918 remains +# unknown and will be difficult to ascertain. I e-mailed Tammy a few months +# ago to ask if Sunday June 2 was a reasonable guess. She said it was just +# as plausible as any other date (in June). She also said that after writing the +# article she had discovered another time change in 1916; this is the subject +# of another article which she wrote in October 2010. +# <a href="http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&…"> +# http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&… +# </a> + +# Here is a summary of the three clock change events in Creston's history: +# 1. 1884 or 1885: adoption of Mountain Standard Time (GMT-7) +# Exact date unknown +# 2. Oct 1916: switch to Pacific Standard Time (GMT-8) +# Exact date in October unknown; Sunday October 1 is a reasonable guess. +# 3. June 1918: switch to Pacific Daylight Time (GMT-7) +# Exact date in June unknown; Sunday June 2 is a reasonable guess. +# note#1: +# On Oct 27/1918 when daylight saving ended in the rest of Canada, +# Creston did not change its clocks. +# note#2: +# During WWII when the Federal Government legislated a mandatory clock change, +# Creston did not oblige. +# note#3: +# There is no guarantee that Creston will remain on Mountain Standard Time +# (UTC-7) forever. +# The subject was debated at least once this year by the town Council. +# <a href="http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/11676…"> +# http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/11676… +# </a> + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Vanc 1918 only - Apr 14 2:00 1:00 D -Rule Vanc 1918 only - Oct 31 2:00 0 S +Rule Vanc 1918 only - Oct 27 2:00 0 S Rule Vanc 1942 only - Feb 9 2:00 1:00 W # War Rule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace Rule Vanc 1945 only - Sep 30 2:00 0 S @@ -1813,6 +1880,13 @@ -8:00 Canada P%sT 1947 -8:00 Vanc P%sT 1972 Aug 30 2:00 -7:00 - MST +Zone America/Creston -7:46:04 - LMT 1884 + -7:00 - MST 1916 Oct 1 + -8:00 - PST 1918 Jun 2 + -8:00 1:00 PDT 1918 Oct 27 2:00 + -7:00 - MST 1942 Feb 9 2:00 + -8:00 Canada P%sT 1945 Sep 30 2:00 + -7:00 - MST # Northwest Territories, Nunavut, Yukon --- southamerica 2011/10/24 14:35:42 1.5 +++ southamerica 2012/02/26 23:31:59 @@ -1,5 +1,5 @@ # <pre> -# @(#)southamerica 8.52 +# @(#)southamerica 8.53 # This file is in the public domain, so clarified as of # 2009-05-17 by Arthur David Olson. @@ -1218,6 +1218,28 @@ # August, not in October as they have since 1968. This is a pilot plan # which will be reevaluated in 2012. +# From Mauricio Parada (2012-02-22), translated by Glenn Eychaner (2012-02-23): +# As stated in the website of the Chilean Energy Ministry +# http://www.minenergia.cl/ministerio/noticias/generales/gobierno-anuncia-fec… +# The Chilean Government has decided to postpone the entrance into winter time +# (to leave DST) from March 11 2012 to April 28th 2012. The decision has not +# been yet formalized but it will within the next days. +# Quote from the website communication: +# +# 6. For the year 2012, the dates of entry into winter time will be as follows: +# a. Saturday April 28, 2012, clocks should go back 60 minutes; that is, at +# 23:59:59, instead of passing to 0:00, the time should be adjusted to be 23:00 +# of the same day. +# b. Saturday, September 1, 2012, clocks should go forward 60 minutes; that is, +# at 23:59:59, instead of passing to 0:00, the time should be adjusted to be +# 01:00 on September 2. +# +# Note that...this is yet another "temporary" change that will be reevaluated +# AGAIN in 2013. + +# NOTE: ChileAQ rules for Antarctic bases are stored separately in the +# 'antarctica' file. + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Chile 1927 1932 - Sep 1 0:00 1:00 S Rule Chile 1928 1932 - Apr 1 0:00 0 - @@ -1248,8 +1270,6 @@ Rule Chile 1998 only - Sep 27 4:00u 1:00 S Rule Chile 1999 only - Apr 4 3:00u 0 - Rule Chile 1999 2010 - Oct Sun>=9 4:00u 1:00 S -Rule Chile 2011 only - Aug Sun>=16 4:00u 1:00 S -Rule Chile 2012 max - Oct Sun>=9 4:00u 1:00 S Rule Chile 2000 2007 - Mar Sun>=9 3:00u 0 - # N.B.: the end of March 29 in Chile is March 30 in Universal time, # which is used below in specifying the transition. @@ -1257,7 +1277,11 @@ Rule Chile 2009 only - Mar Sun>=9 3:00u 0 - Rule Chile 2010 only - Apr Sun>=1 3:00u 0 - Rule Chile 2011 only - May Sun>=2 3:00u 0 - -Rule Chile 2012 max - Mar Sun>=9 3:00u 0 - +Rule Chile 2011 only - Aug Sun>=16 4:00u 1:00 S +Rule Chile 2012 only - Apr Sun>=23 3:00u 0 - +Rule Chile 2012 only - Sep Sun>=2 4:00u 1:00 S +Rule Chile 2013 max - Mar Sun>=9 3:00u 0 - +Rule Chile 2013 max - Oct Sun>=9 4:00u 1:00 S # IATA SSIM anomalies: (1992-02) says 1992-03-14; # (1996-09) says 1998-03-08. Ignore these. # Zone NAME GMTOFF RULES FORMAT [UNTIL] @@ -1403,6 +1427,21 @@ # will not revert to local mean time, but clocks will remain on Summer # time (UTC/GMT - 3 hours) throughout the whole of 2011. Any long term # change to local time following the trial period will be notified. +# +# From Andrew Newman (2012-02-24) +# A letter from Justin McPhee, Chief Executive, +# Cable & Wireless Falkland Islands (dated 2012-02-22) +# states... +# The current Atlantic/Stanley entry under South America expects the +# clocks to go back to standard Falklands Time (FKT) on the 15th April. +# The database entry states that in 2011 Stanley was staying on fixed +# summer time on a trial basis only. FIG need to contact IANA and/or +# the maintainers of the database to inform them we're adopting +# the same policy this year and suggest recommendations for future years. +# +# For now we will assume permanent summer time for the Falklands +# until advised differently (to apply for 2012 and beyond, after the 2011 +# experiment was apparently successful.) # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Falk 1937 1938 - Sep lastSun 0:00 1:00 S Rule Falk 1938 1942 - Mar Sun>=19 0:00 0 - @@ -1415,14 +1454,14 @@ Rule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 S Rule Falk 1986 2000 - Apr Sun>=16 0:00 0 - Rule Falk 2001 2010 - Apr Sun>=15 2:00 0 - -Rule Falk 2012 max - Apr Sun>=15 2:00 0 - -Rule Falk 2001 max - Sep Sun>=1 2:00 1:00 S +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 + -4:00 Falk FK%sT 2011 Apr 16 + -3:00 Falk FKST # French Guiana # Zone NAME GMTOFF RULES FORMAT [UNTIL] --- zone.tab 2011/10/31 06:49:46 1.4 +++ zone.tab 2012/01/06 11:56:21 @@ -1,5 +1,5 @@ # <pre> -# @(#)zone.tab 8.52 +# @(#)zone.tab 8.54 # This file is in the public domain, so clarified as of # 2009-05-17 by Arthur David Olson. # @@ -131,6 +131,7 @@ CA +690650-1050310 America/Cambridge_Bay Mountain Time - west Nunavut CA +6227-11421 America/Yellowknife Mountain Time - central Northwest Territories CA +682059-1334300 America/Inuvik Mountain Time - west Northwest Territories +CA +4906-11631 America/Creston Mountain Standard Time - Creston, British Columbia CA +5946-12014 America/Dawson_Creek Mountain Standard Time - Dawson Creek & Fort Saint John, British Columbia CA +4916-12307 America/Vancouver Pacific Time - west British Columbia CA +6043-13503 America/Whitehorse Pacific Time - south Yukon @@ -333,7 +334,7 @@ RU +5443+02030 Europe/Kaliningrad Moscow-01 - Kaliningrad RU +5545+03735 Europe/Moscow Moscow+00 - west Russia RU +4844+04425 Europe/Volgograd Moscow+00 - Caspian Sea -RU +5312+05009 Europe/Samara Moscow - Samara, Udmurtia +RU +5312+05009 Europe/Samara Moscow+00 - Samara, Udmurtia RU +5651+06036 Asia/Yekaterinburg Moscow+02 - Urals RU +5500+07324 Asia/Omsk Moscow+03 - west Siberia RU +5502+08255 Asia/Novosibirsk Moscow+03 - Novosibirsk

9 23

Fwd: Re: Creston
by Random832 March 1, 2012

March 1, 2012

I hit the wrong reply button _again_... -------- Original Message -------- Subject: Re: [tz] Creston Date: Wed, 29 Feb 2012 19:52:05 -0500 From: Random832 <random(a)imap.cc> To: Tim Parenti <tim(a)timtimeonline.com> On 02/29/2012 02:47 PM, Tim Parenti wrote: > Like Chris Walton, Philip Newton, and Alan Barrett, I prefer the > inclusion of all the "zone changes," even if they didn't result in > clock changes. Although, in the time period we're discussing, > broadcast schedules weren't really a factor, this still seems to me to > be how people travelling through the area (by railroad, for instance) > would think of the time... not in terms of UTC, but rather in terms of > offsets from the surrounding zones. Knowing if one's time was "in > line" with the bulk of the Pacific zone or the Mountain Zone would be > important, even if that effect is caused by everyone else changing > their clocks, not you. I would add the caveat that this depends on the _actual_ local practice. Before DST was adopted in Indiana, people here [at least around me] always called the time Eastern Standard, and were only dimly aware that we were on the same time as Chicago for part of the year. Even despite broadcast schedules being an issue.

1 0