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IANA website error: 2012b -> 2012a
by Andrew Paprocki March 3, 2012

March 3, 2012

The IANA website currently says: "Time Zone Data v. 2012b (Released 2 March 2012) tzdata2012b.tar.gz (202kb)" Yet the href points to: http://www.iana.org/time-zones/repository/releases/tzdata2012a.tar.gz -Andrew

2 1

tabs in zone.tab
by Zefram March 2, 2012

March 2, 2012

My automatic repackager for CPAN has just barfed on the zone.tab in tzdata2012a. I should have checked the diff more carefully, I guess. The fault it finds is that the new America/Creston line has *two* tab characters between "America/Creston" and the region description. The comments at the top of the file include "Columns are separated by a single tab.". Previously the file adhered to the single tab rule, and I made my parser correspondingly strict. Obviously I'll manually intervene to get 2012a repackaged, but I think the file should be fixed for 2012b. -zefram

3 4

Reports of Leap Year problem...
by Robert Elz March 2, 2012

March 2, 2012

I cannot confirm any of this, except that the URL's included (the relevant ones for this list anyway) do point at web pages with content as claimed, but this seems like the kind of information that readers of this list would be amused by... kre

1 0

tzcode2012b & tzdata2012b available
by Robert Elz March 2, 2012

March 2, 2012

The files ftp://munnari.oz.au/pub/tzdata2012b.tar.gz ftp://munnari.oz.au/pub/tzcode2012b.tar.gz are now available. These reflect the changes circulated earlier today on the list. There is just one change to tzcode2012b (compared witth 2012a): the Makefile that was accidentally included with 2012a has been replaced with the version that should have been there, which is identical with the previous version (from tzcode2011i). For people upgrading directly from 2011i to 2012b, the changes in tzcode are just to the README and tz-art.htm and tz-link.htm and reflect changes to the mailing list address & subscription URLs, and the code distribution URLs and methods. tz-link.htm also has a link to DateTime::TimeZone::Tzfile added. There are just two changes in tzdata2012b compared with 2012a. Most significantly, summer time in Cuba has been delayed 3 weeks (now starts April 1 rather than March 11). Since Mar 11 (the old start date, as listed in 2012a) is just a little over a week away, this change is urgent. Less importantly, an excess tab in one of the changes in zone.tab in 2012a has been removed. Compared to the last long lived distribution (given tzdata2012a existed less than a day) which was tzdata2011n, the other major changes are: Chile 2011/2012 and 2012/2013 summer time date adjustments. Falkland Islands onto permanent summer time (we're assuming for the foreseeable future, though 2012 is all we're fairly certain of.) Armenia has abolished Summer Time. Tokelau jumped the International Date Line back last December (just the same as their near neighbour, Samoa). America/Creston is a new zone for a small area of British Columbia There will be a leapsecod 2012-06-30 23:59:60 UTC. Other minor changes are: Corrections to 1918 Canadian summer time end dates. Updated URL for UK timezone history (in comments) A few typos in Le Corre's list of free French place names (comments) Once again, crypto hashes of the distribution files, generated using NetBSD's pkgsrc digest program, are appended so you can verify the distribution files you fetch have not been corrupted. kre MD5 (tzcode2012b.tar.gz) = 6137322ffd36e1fd5128885be1c57008 RMD160 (tzcode2012b.tar.gz) = 25acce807c9e19d8294fe4dd8eac08fba9d796af SHA1 (tzcode2012b.tar.gz) = 7172f71a23fb6fe8f99099f810d05366ed5d7130 SHA512 (tzcode2012b.tar.gz) = 12b60b6b00db51651a85e4448c8795c8f0d0fbeeec66bec4e8613dff41fec3324a0b20f7d66183541a389eff0d2a93b3346a045a58a0d977739924f06d017fd3 TIGER (tzcode2012b.tar.gz) = a4378982416395d5d632270db4fb3c5c568ebf57b7130636 WHIRLPOOL (tzcode2012b.tar.gz) = 2a343f318b737a2b4e85f29416d25b07a04f3395a49c6e863a3bf4492b63de17545d30b0377ab4d1587fd0fc85ecf234fe2c45bff4bd2f0f97b33b82b3f2e3f0 MD5 (tzdata2012b.tar.gz) = 0615fd29def380a917e528433c820368 RMD160 (tzdata2012b.tar.gz) = b58bb8a633b664f5babed8a6681ecc25a039733d SHA1 (tzdata2012b.tar.gz) = cd7c43bf8ccf56d174a2b85d2da35e83fd8f1107 SHA512 (tzdata2012b.tar.gz) = 08f3f07e0abf75d278210fc9237344b6613b6b055bedf974b75437bfa153bdaf238135487acde38f352e55805b5bc9b3db93d9c08fdb3cfba68b3609c06445f9 TIGER (tzdata2012b.tar.gz) = 0b67a1f5408d8b6addd7c07df6e87fa9e54bb9102ae758fd WHIRLPOOL (tzdata2012b.tar.gz) = 530a6bcdf4fe4c92c478e709093c19fc2424c52a55756ea2e6cf66854f659bd67c6503e6235aa23348f5caeb5e92348a34d731334ca168a410feaa33f85533b0

1 0

Proposed update to the tz package files
by Robert Elz March 1, 2012

March 1, 2012

The combination of an accidental change to the Makefile in tzcode2012a that was never intended to be released, and the change of the summer time start date for Cuba, that we discovered just too late for 2012a (and the stray extra tab in zone.tab) has led me to the conclusion that we need 2012b very soon - like today... There will be both code & data files - the sole change in the code is to return the Makefile to the exact same version it had in 2011i, which was what it was supposed to be in 2012a. A diff of the data change from 2012a to (what will probably become) 2012b is appended. The only real change is to the start date for summer time in Cuba this year. The end date is not yet certain, so I'll just leave it as we have it (last Sun in Oct) and we'll see what happens in September or October (probably). Since there is no discernable pattern to the start dates, I'm also proposing leaving that for 2013 as we had assumed it would be for 2012 (second Sunday in March). It has been that more years recently than anything else (just not last year, or this year, but they've not been the same either.) The excess tab from the zone.tab file is also gone. For anyone considering upgrading their system to 2012a, who hasn't already done it, I'd advise waiting on 2012b, it is not going to be a long wait. kre --- northamerica 2012/03/01 11:22:55 1.5 +++ northamerica 2012/03/01 20:46:07 @@ -1,5 +1,5 @@ # <pre> -# @(#)northamerica 8.52 +# @(#)northamerica 8.53 # This file is in the public domain, so clarified as of # 2009-05-17 by Arthur David Olson. @@ -2820,8 +2820,9 @@ Rule Cuba 2009 2010 - Mar Sun>=8 0:00s 1:00 D Rule Cuba 2011 only - Mar Sun>=15 0:00s 1:00 D Rule Cuba 2011 only - Nov 13 0:00s 0 S -Rule Cuba 2012 max - Mar Sun>=8 0:00s 1:00 D +Rule Cuba 2012 only - Apr 1 0:00s 1:00 D Rule Cuba 2012 max - Oct lastSun 0:00s 0 S +Rule Cuba 2013 max - Mar Sun>=8 0:00s 1:00 D # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Havana -5:29:28 - LMT 1890 --- zone.tab 2012/03/01 11:26:34 1.6 +++ zone.tab 2012/03/01 15:30:24 @@ -131,7 +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 +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

1 0

Cuba delays DST to April
by Steffen Thorsen March 1, 2012

March 1, 2012

According to Radio Reloj, Cuba will start DST on Midnight between March 31 and April 1. Radio Reloj has the following info (Spanish): http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529… Our info on it: http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html Best regards, Steffen Thorsen - timeanddate.com

2 1

tzcode2012a & tzdata2102a released.
by Robert Elz March 1, 2012

March 1, 2012

The files ftp://munnari.oz.au/pub/tzdata2012a.tar.gz ftp://munnari.oz.au/pub/tzcode2012a.tar.gz are now available. These reflect the changes circulated earlier this week, as corrected based upon reports received, and summarised below. The changes in tzcode2012a (compared to the previous version, 2011i) are entirely to the README and tz-art.htm and tz-link.htm files, if none of those concern you, you can ignore the code update. The changes reflect the changed addresses for the mailing list and the code and data distribution points & methods (and a link to DateTime::TimeZone::Tzfile has been added to tz-link.htm). In tzdata2012a (compared to the previous release, which was 2011n) the major changes are: Chile 2011/2012 and 2012/2013 summer time date adjustments. Falkland Islands onto permanent summer time (we're assuming for the foreseeable future, though 2012 is all we're fairly certain of.) Armenia has abolished Summer Time. Tokelau jumped the International Date Line back last December (just the same as their near neighbour, Samoa). America/Creston is a new zone for a small area of British Columbia There will be a leapsecod 2012-06-30 23:59:60 UTC. A few more minor changes are also included: Changes to Canadian 1918 summer time end dates (so it occurred on a Sunday, rather than Thursday, which is more likely correct.) A new URL (in the comments in the europe zone file) to the article describing the history of timezones in the UK (this should probably be promoted to a link in tzlink.htm or something, but that hasn't happened yet.) A couple of typo corrections to the list of French place names reported by Henri Le Corre that define the upper limit of the free zone where (as I understand it) German rules were not applies during (a part of) WWII. These are based on the rendition supplied by John Halloran, and unless I botched it, should make what we have be a correct copy of the source, as nearly as is possible in strict ASCII (the accent marks are missing...) I know I said we would hold off on this until the next version, but with the data being available, and the corrections needed so simple, I thought I could include it in this version. Now we can discuss what how we should represent the data with perhaps more modern (or better ascii versions of) place names in the next version, but at least now we're working from a common (external) base source. I still have not implementewd (even really seriously investigated) the procedures necessary to generate signed files, so once again I am appending to this message the results of several (crypto strength) hash functions applied to the two files (and this time, all this has been prepared on my laptop at a time when it isn't connected to any network at all, so there's an even higher level of assurance than normal that these hashes really do represent the data I intend to distribute.) The "digest" program from NetBSD's pkgsrc (which can be installed on many different OSs) was used to generate these values (but anything running any of the same algorithms should produce the same results.) Finally, it is my hope (though without intending to apply any pressure) that the next release will be back under the coordination of Arthur David Olson (I'll continue if he's unwilling, and Paul Eggert doesn't want to take over instead, but I'd much prefer to see ado back in control, for as long as he wants to continue.) Thanks for all the assistance from everyone that I've received over the few months I've been doing this, this is truly one of the nicest and most satisfying of the network communities in which to participate. kre MD5 (tzcode2012a.tar.gz) = a72bb8c29893ee3bfd1101aca29d4064 MD5 (tzdata2012a.tar.gz) = cc43867f4768e5c2e8315d9b3cac62ed RMD160 (tzcode2012a.tar.gz) = b498355392e7e141e12fc4ca3592cfec6e96ef00 RMD160 (tzdata2012a.tar.gz) = b95722a2d42744bb217e11ace7b5bc7195f86d77 SHA1 (tzcode2012a.tar.gz) = 80e0c9efb067950f34826d0708ff61e72e019da5 SHA1 (tzdata2012a.tar.gz) = 5bd828d0845937da92c0518060a4aa8fbad81f8d SHA512 (tzcode2012a.tar.gz) = c37d95081a1097ba46d1887ef13bf112216bc45f21542bf559744f329602e109c3a9a7a7705ed41432049ad3905f87a747ddbc6f7c11470fcf44fc5bf946c9e3 SHA512 (tzdata2012a.tar.gz) = dff197b7ae7a204fa2c716d27ad83c0f29fba3bdede0059d0507ad3f4117849c90e578df5bba62c397e1709bce1c26382a61b0ea9c8face671e7228dbf5b7bab TIGER (tzcode2012a.tar.gz) = 3f38fc0884f3eef800289a9e6cd9ee69b0405f75447319fc TIGER (tzdata2012a.tar.gz) = d0609c3f36e735ab5708f473336f66edb33f68d58333b9dc WHIRLPOOL (tzcode2012a.tar.gz) = 5a98d5ecb0956eba9f52403ea58125933998f3d1f402fba5b04815b5c2d861e9c010df38258a8f479c8a26a7d301c5d45e63a5a0586e24dcdd97007051e0ca5b WHIRLPOOL (tzdata2012a.tar.gz) = 4c3e7e372d708baf5cf15ece01c31f38880e50fbf402ef346d0cd27f4203282862660322a76efb1144b84ff08c86407e714fc1d858e1c7ce22f7cbb10923fb52

3 3

Re: [tz] Chilean Government annuounced new date for leaving and entering DST in 2012
by Glenn Eychaner March 1, 2012

March 1, 2012

On Feb 29, 2012, at 9:00 AM, tz-request(a)iana.org wrote: > Thank you so much for the diff. - as you said, we can only hope this change gets formalized before March 11 > There is another thread about this ([tz] Updated Proposed time zone package changes (Armenia, Chile, Falklands, Tokelau, Antarctica, Creston(Canada))), according to the contents in that thread an updated timezone package will be released on March 1st 2012 Since Microsoft also seems to be taking this seriously and preparing a hotfix http://blogs.technet.com/b/latam/archive/2012/02/27/chile-dst-2012-fallback… I am currently assuming that this change is "official", and recommending including it in the March 1 timezone update. Finally, I realized that once again I forgot to do the Antarctica file, so here is an update for that file which patches in all the recent time zone changes over the last few years. Officially, ChileAQ should have the same offset and rules as mainland Chile, but I don't know what is done in actual practice. --- antarctica.orig 2011-09-20 14:55:03.000000000 -0300 +++ antarctica 2012-02-29 10:15:23.000000000 -0300 @@ -43,6 +43,15 @@ 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 2011 only - Aug Sun>=16 4:00u 1:00 S +Rule ChileAQ 2012 only - Sep 2 4:00u 1:00 S +Rule ChileAQ 2013 max - Oct Sun>=9 4:00u 1:00 S +Rule ChileAQ 2000 2007 - Mar Sun>=9 3:00u 0 - +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 2012 only - Apr 29 3:00u 0 - +Rule ChileAQ 2013 max - Mar Sun>=9 3:00u 0 - # These rules are stolen from the `australasia' file. -- Glenn Eychaner (geychaner(a)lco.cl) Telescope Systems Programmer, Las Campanas Observatory

2 5

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.

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