July 2013 - tz - lists.iana.org

Re: [tz] tz Digest, Vol 22, Issue 13
by ruggety＠ovi.com July 20, 2013

July 20, 2013

Why the change? ---------- Sent from my Nokia phone ------Original message------ From: <tz-request(a)iana.org> To: <tz(a)iana.org> Date: Tuesday, July 16, 2013 12:00:03 PM GMT+0000 Subject: tz Digest, Vol 22, Issue 13 Send tz mailing list submissions to tz(a)iana.org To subscribe or unsubscribe via the World Wide Web, visit https://mm.icann.org/mailman/listinfo/tz or, via email, send a message with subject or body 'help' to tz-request(a)iana.org You can reach the person managing the list at tz-owner(a)iana.org When replying, please edit your Subject line so it is more specific than "Re: Contents of tz digest..." Today's Topics: 1. Day length in the news (Arthur David Olson) 2. Saving electricity via horizontal time zones (Paul Eggert) ---------------------------------------------------------------------- Message: 1 Date: Mon, 15 Jul 2013 16:42:33 -0400 From: Arthur David Olson <arthurdavidolson(a)gmail.com> To: "tz(a)iana.org" <tz(a)iana.org> Subject: [tz] Day length in the news Message-ID: <CAJvZEYkKfJOnvs=ZbaHv6sVCDa+kQ4fTFbF+aYe4DfCFOKgJBw(a)mail.gmail.com> Content-Type: text/plain; charset="iso-8859-1" (Probably of marginal interest to most folks on the list.) >From the on-line Washington Post: "Stutters in Earth's spin changed length of days slightly" http://www.washingtonpost.com/national/health-science/stutters-in-earths-sp… The Post article stems from R. Holme & O. de Viron, "Characterization and implications of intradecadal variations in length of day," Nature 499, 202-204 (11 July 2013); http://www.nature.com/nature/journal/v499/n7457/full/nature12282.html (only abstract is available for free). --ado

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Informing ICANN about IANA time zone database status of Jerusalem
by Tobias Conradi July 17, 2013

July 17, 2013

---------- Forwarded message ---------- From: ICANN <do-not-reply(a)icann.org> Date: Sat, May 4, 2013 at 7:34 PM Subject: Form submission confirmation To: ...(a)tobiasconradi.com This is a copy for your records: Submitted on 4 May 2013 Submitted by user: Submitted values are: First Name: Last Name: Email Address: ...(a)tobiasconradi.com Affiliation: Country of Current Residence: Germany Please Select a Category: General - for general questions and comments Subject: ICANN vs UN and international practice - Status of Jerusalem Message: ICANN puts Jerusalem as Israel territory. The issue has been posted to the IANA time zone mailing list, but the maintainer did not reply. http://mm.icann.org/pipermail/tz/2013-April/019134.html http://mm.icann.org/pipermail/tz/2013-May/019227.html -- Tobias Conradi Rheinsberger Str. 18 10115 Berlin Germany http://tobiasconradi.com

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Re: [tz] Number of active tz regions?
by David Patte ₯ July 17, 2013

July 17, 2013

Thank you all. This is what I understood as well. On 2013-07-17 13:32, Tim Parenti wrote: > > On 17 July 2013 12:53, David Patte ₯ <dpatte(a)relativedata.com > <mailto:dpatte@relativedata.com>> wrote: > > Am I correct to say, that for every lat/lng there (theoretically) > exists a zone in that country and/or region that represents its > timezone rules since 1970; that if no tz zone exists in that > country and/or region that represents it clock rules since 1970 > correctly, that a new zone is to be created in tz for it? > > > In theory, yes, that is my understanding. Of course, in international > waters, the zone that "correctly" represents the local rules would be, > e.g., Etc/GMT-3, but in general, if an existing set of rules does not > properly cover a region (for all timepoints since 1970), a new zone is > to be created. > > On 17 July 2013 12:53, David Patte ₯ <dpatte(a)relativedata.com > <mailto:dpatte@relativedata.com>> wrote: > > I am looking at this from the perspective of timezone boundaries; > that tz boundaries (theoretically) don't change unless new tz > zones are created, or it is discovered that a latlng's clock > 'rules' since 1970 can be more accurately be described by a > different tz zone? > > > The tz project neither defines nor tracks zone boundaries; however, it > is sometimes helpful to think of zones in this manner. Obviously such > boundaries would change upon the creation of a new zone. You could > make the case that such boundaries would also change if it is > discovered at some point that location A better matches zone X than > zone Y, but as long as location A is not itself defined in zone.tab, > this does not affect tz data, and thus does not concern the tz project > beyond documenting appropriate commentary. > > -- > Tim Parenti --

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Saving electricity via horizontal time zones
by Paul Eggert July 15, 2013

July 15, 2013

A recent paper by Felix Weinhardt of the Spatial Economics Research Centre of the London School of Economics and Political Science argues that daylight saving time increases electricity use in the northern part of the U.S., but decreases its use in the south. Weinhardt proposes horizontal time zones to ameliorate this, and estimates that their use would save the U.S. about 0.1% of its total GDP. Weinhardt F. The importance of time zone assignment: evidence from residential electricity consumption. SERC Discussion Paper 126 (January 2013). http://www.lse.ac.uk/GranthamInstitute/events/docs/The-importance-of-time-z…

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Day length in the news
by Arthur David Olson July 15, 2013

July 15, 2013

(Probably of marginal interest to most folks on the list.) >From the on-line Washington Post: "Stutters in Earth's spin changed length of days slightly" http://www.washingtonpost.com/national/health-science/stutters-in-earths-sp… The Post article stems from R. Holme & O. de Viron, "Characterization and implications of intradecadal variations in length of day," Nature 499, 202-204 (11 July 2013); http://www.nature.com/nature/journal/v499/n7457/full/nature12282.html (only abstract is available for free). --ado

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400-year-repeat edge cases
by Zefram July 14, 2013

July 14, 2013

The attached patch tweaks zic's explicit-400-years hack to better handle some edge cases. It's based on current github source. -zefram

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re DST in Russia 2011
by Trevor North July 11, 2013

July 11, 2013

I note in the iana time zone database for Europe that it states the following # From Alexander Krivenyshev (2011-06-14): # According to Kremlin press service, Russian President Dmitry Medvedev # signed a federal law "On calculation of time" on June 9, 2011. # According to the law Russia is abolishing daylight saving time. # # Medvedev signed a law "On the Calculation of Time" (in russian): # <a href="http://bmockbe.ru/events/?ID=7583"> # http://bmockbe.ru/events/?ID=7583 # </a> # # Medvedev signed a law on the calculation of the time (in russian): # <a href="http://www.regnum.ru/news/polit/1413906.html"> # http://www.regnum.ru/news/polit/1413906.html # </a> # From Arthur David Olson (2011-06-15): # Take "abolishing daylight saving time" to mean that time is now considered # to be standard. Note that an Oracle Support document (reference Russia abandons DST in 2011 - Impact on Oracle RDBMS [ID 1335999.1]) relating to the change in Russia includes the following information Russian State Duma passed the third reading of the bill 509727-5 "On the Calculation of Time" (in Russia) and adopted a law abolishing the transition to daylight saving time. The old rule was to move back on last Sunday of October (30 October 2011) The Russian timezones will stay on the "summertime". For Questions/official statements about the DST change itself, please contact the Russian Government I think this is contrary to Mr Olsons assertion that abolishing now means standard. Regards Trevor ___________________________ Trevor North Oracle Retail Principal Consultant Sterling Endeavours Limited 128 Wilmington Close, Watford Hertfordshire, WD18 0FQ, UK Mobile (UK): +447773377050 Mobile (SE): +46702455040 Skype: twjnorth LinkedIn: <http://uk.linkedin.com/in/oracleretailconsultant/> uk.linkedin.com/in/oracleretailconsultant/ Oracle Retail Q&A: <http://www.linkedin.com/groups/Oracle-Retail-Q-4926078/about> http://www.linkedin.com/groups/Oracle-Retail-Q-4926078/about

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IERS Bulletin C 46
by Garrett Wollman July 9, 2013

July 9, 2013

Yesterday, IERS issued a new Bulletin C, annoncing that no leap second will be introduced at the end of this year. Reference: http://hpiers.obspm.fr/iers/bul/bulc/bulletinc.dat -GAWollman

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Israel Daylight Saving Time -- Proposed Changes [2013 and beyond]
by Ephraim Silverberg July 9, 2013

July 9, 2013

The following is a translation of a news flash from a few minutes ago: The Minister of Interior, Gideon Saar, adopted the proposals of the committee he appointed last month to examine the daylight saving time regulations. Saar will publish a draft of a [new] law that will be brought before the government and the Knesset next month so that the new daylight saving time will start already this year and will continue for more than 200 days until the end of October. When details of the proposed draft law come to light, I will update the list. _____________________________________ Ephraim Silverberg, CSE System Group, Hebrew University, Jerusalem, Israel. Phone/Fax number: +972-2-5494521

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Morocco DST Interruption
by Chandrashekhar Karmarkar July 9, 2013

July 9, 2013

The Moroccan government has recently announced that the country will return to standard time at 3:00 a.m. (03:00) on Sunday, July 7, 2013 local time. Clocks will be turned back one hour. DST will resume again at 2:00 a.m. (02:00) on Saturday, August 10, 2013, when one hour will be added again to the local time. The end and resumption of DST was originally planned to coincide with the beginning and end of Ramadan, which lasts from July 9 to August 8, 2013. Has IANA published these changes? Regards, Chandrashekhar Karmarkar Disclaimer: This email (including any attachments) is intended for the sole use of the recipient/s and may contain material that is CONFIDENTIAL. Any unauthorized disclosure / copying / distribution or forwarding of this message or part is STRICTLY PROHIBITED. If you have erroneously received this message, please delete it immediately and notify the sender. No liability is assumed for any errors and/or omissions in the contents of this message. Information in this message that does not relate to the official business of this Company shall be understood as neither given nor endorsed by it. If verification is required please request a hard-copy version. To know more about Accelya Kale Solutions Ltd, visit www.accelyakale.com

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