- tz - lists.iana.org

Re: [tz] timezone change for antarctica\casey [SEC=UNCLASSIFIED]
by Michael Chinn Oct. 31, 2015

Oct. 31, 2015

| Can we now assume, do you think, that Casey will be switching back and forth between +0800 and +1100 in accordance with Australian summer time shifts for the forseeable future (that 3 hour offset change will break assumptions made in some code I expect!) The TZ changes, particularly at Casey, are highly variable, they are based around resupply and flights. They will rarely line up with DST changes, this year there were early flights (leaving tomorrow) and an early insertion of ground crew into Wilkins | What's useful to know is when it was first founded/settled, what times were in use locally, when they altered (as accurately as possible) and what the prediction is for the future. I will endeavour to go through the database and pull out the TZ changes, should be able to get 3-4 years. Regarding predictions, sometimes there are only a couple of days notice on changes much to the anguish of a few wintering expiditioners. All changes are visible live on the external site (it's the same database) ___________________________________________________________________________ Australian Antarctic Division - Commonwealth of Australia IMPORTANT: This transmission is intended for the addressee only. If you are not the intended recipient, you are notified that use or dissemination of this communication is strictly prohibited by Commonwealth law. If you have received this transmission in error, please notify the sender immediately by e-mail or by telephoning +61 3 6232 3209 and DELETE the message. Visit our web site at http://www.antarctica.gov.au/ ___________________________________________________________________________

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timezone database isn't everywhere yet
by Arthur David Olson Oct. 30, 2015

Oct. 30, 2015

I serve on the board of elections for Takoma Park, Maryland, USA.. Early voting in our city election started on 2015-10-28; election day is 2015-11-03. The city uses county-provided electronic poll books to track who has voted. Two were in use on the 28th. I noticed that they were showing times that differed by an hour. I inquired about it; I was told it was deliberate, and was because daylight saving time was in effect when voting started whereas standard time will be in effect when voting ends. If only we had a way for gizmos to automatically switch the clock when daylight saving time ends.-S @dashdashado

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tzdata isstd question
by Ken Murchison Oct. 30, 2015

Oct. 30, 2015

All, Given the following zone: Zone America/Atikokan -6:06:28 - LMT 1895 -6:00 Canada C%sT 1940 Sep 29 -6:00 1:00 CDT 1942 Feb 9 2:00s -6:00 Canada C%sT 1945 Sep 30 2:00 -5:00 - EST I'm wondering why the transition on Feb 9, 1942 isn't flagged as being observed at standard time in the compiled tzfile. Does the time suffix in UNTIL not get applied to the following transition? -- Kenneth Murchison Principal Systems Software Engineer Carnegie Mellon University

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include implementations of str{f,p}time{,_l} in tzcode
by christos＠zoulas.com Oct. 30, 2015

Oct. 30, 2015

Hello, I think that it is an omission for those functions not to be included in tzcode. They are tightly bound to the rest of the time code implementation and although standardized, the implementations that the most popular operating systems provide vary in behavior. Yes, I understand that there are portability considerations (locale for example) that need to be handled, but not including them is taking the easy way out. Best, christos

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timezone change for antarctica\casey [SEC=UNCLASSIFIED]
by Michael Chinn Oct. 30, 2015

Oct. 30, 2015

Hi, Im not too sure on the correct formatting for submitting changes to tzdata, or if the Antarctic tzdata is still being maintained? There is a change for the Australian Antarctic zone Antarctica/Casey went to +1100 for Summer operations on Sunday 04 October at 2am. Source: http://www.antarctica.gov.au/living-and-working/stations/weather and internal emails Also, there is an location for Wilkins Aerodrome that technically can have its own timeone separate from Casey. If it is useful I can get some historical dates? Michael Chinn Information Communications & Technology Section Australian Antartic Division 203 Channel Hwy Kingston TAS 7050 Ph 03 6232 3289 Fax 0362832574 ___________________________________________________________________________ Australian Antarctic Division - Commonwealth of Australia IMPORTANT: This transmission is intended for the addressee only. If you are not the intended recipient, you are notified that use or dissemination of this communication is strictly prohibited by Commonwealth law. If you have received this transmission in error, please notify the sender immediately by e-mail or by telephoning +61 3 6232 3209 and DELETE the message. Visit our web site at http://www.antarctica.gov.au/ ___________________________________________________________________________

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Official definition and origin of the term "Central European Time"
by Even Scharning Oct. 29, 2015

Oct. 29, 2015

Is there an official definition of the term "Central European Time" (CET), specifically which UTC offset(s) it refers to? If there is no official definition, where did the term originate from? I asked the information desk at the EU (Europe Direct) to help me find links to relevant legislature, but their reply was that term CET is "not regulated at a EU level, but internationally". All credible sources I have found, say that CET is a constant UTC+1. The closest thing I have found to an authoritative document, is the German Time Act from 1978. It says: "Legal time is Central European Time. It is defined as Coordinated Universal Time plus one hour." There is no reference to the origin of this definition, and no information of whether anyone other than the Germans agree on this definition. http://www.cl.cam.ac.uk/~mgk25/time/zeitgesetz.en.html On the EU's web pages (for instance http://europa.eu/contact/index_en.htm) times are usually given in CET, not CEST (Central European Summer Time), even though daylight saving time is currently observed. Google gives a few hundred thousand results for CET on europa.eu, and numerous of these results are hits on dates in the daylight saving time period. I think it makes more sense to define CET as alternating between UTC+1 (standard time) and UTC+2 (when DST is observed). (See http://time.is/CET for a more elaborate definition.) This is in line with for instance the US time zones Pacific Time and Eastern Time, which refer to the time currently observed, whether it is standard time or daylight saving time. Even Scharning Time.is - exact time for any time zone http://time.is/

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Re: [tz] America/Santa_Isabel
by Greg Slayden Oct. 27, 2015

Oct. 27, 2015

The largest population center in Baja California State south of Ensenada is San Quintín, 190 km south of Ensenada. A new municipality of that name will separate from the large Ensenada municipality on December 1, 2016, and although there are other large localities such as Lazaro Cardenas in that area, San Quintin seems to be the central administrative town. See https://en.wikipedia.org/wiki/San_Quint%C3%ADn,_Baja_California I see conflicting information online about when DST ends there, either November or October. Making contact with locals in that area is likely the best way to find out

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unsubscribe
by Mehdi.Erroussafi＠inwi.ma Oct. 27, 2015

Oct. 27, 2015

[cid:image001.jpg@01D110B0.3DB0CAE0] Elmehdi Erroussafi Manager Core Voice/Data/Vas Direction opérations et maintenance mobile : 0600 000 140 mail : mehdi.erroussafi(a)inwi.ma<mailto:mehdi.erroussafi@inwi.ma> site : www.inwi.ma<http://www.inwi.ma/> imprimer utile préserve l'environnement ________________________________ « Ce message et toutes les pièces y jointes sont susceptibles de contenir des informations confidentielles ou privilégiées, lesquelles ne doivent être reproduites, diffusées ou exploitées sans autorisation. L'intégrité des messages électroniques n'étant pas garantie, WANA CORPORATE décline toute responsabilité dans le cas où ce message aurait été altéré, déformé ou falsifié. Ce message est établi à l'attention exclusive de ses destinataires. Si vous avez reçu ce message par erreur, veuillez le signaler à l'expéditeur et le détruire y compris les pièces jointes. Merci. » -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- « This message and its attachments may contain confidential or privileged information that should not be copied, distributed or used without authorization. As the integrity of emails may not be guaranteed, WANA CORPORATE is not liable for messages that have been modified, changed or falsified. If you have received this email in error, please notify the sender and delete this message and its attachments. Thank you. »

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Re: [tz] Version in zoneinfo files?
by Paul Ganssle Oct. 25, 2015

Oct. 25, 2015

I don't think anyone's stopping you from using old zic to compile newer data. My understanding is that the release version is in the Makefile of all version-2 tzdata files, so nothing would have to change about the tzdata files themselves. You may well have metadata-incompatible zoneinfo files for some time, however, if compiling them with older versions of zic, but I think there's always going to be some lag between the introduction of a new versioning system and reliability in its adoption. On 10/25/2015 01:51 PM, Tim Parenti wrote: > > On 25 October 2015 at 13:26, Paul G <paul(a)ganssle.io <mailto:paul@ganssle.io>> wrote: > > > I think, as Paul E suggests, keeping the version external is a good choice here. It encourages people to use whatever the platform provides to find out the exact, local version information. If anyone knows how to find out what version of tzdata is installed on this macbook I’d love to know :) > > I think this perfectly illustrates the reason why the versioning should be at the zic level and not downstream. > > > There's also the separate matter that tzcode and tzdata are separate and largely independent. Although there have been a few breaking changes to the data format over the years, in principle, there's little reason someone couldn't use a 2014j zic to compile 2015g data, and I suspect that sort of thing actually happens somewhat often. > > -- > Tim Parenti

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Re: [tz] Version in zoneinfo files?
by Guy Harris Oct. 25, 2015

Oct. 25, 2015

On Oct 25, 2015, at 10:37 AM, Paul G <paul(a)ganssle.io> wrote: > On 10/25/2015 01:35 PM, Guy Harris wrote: > >> So where would zic get the version information to put into the binary files? > > My understanding is that it's the VERSION= line of the Makefile in the tzdata tarballs. I.e., you're proposing that the value of the VERSION value in the Makefile be passed as an argument to zic, and zic would put the value of that argument into a field in the files? So, if the goal is to provide a "reliable way to get the version information in a cross-platform way", what would ensure that this field be set properly, for some value of "properly", everywhere that binary tzdata files are generated? I.e., what is to guarantee that 1) nobody downstream change VERSION if they aren't changing the zic files from what's distributed and 2) people change it "properly" if the files don't correspond to a particular version of files that were distributed (e.g., if some downstream supplier takes 2015q and adds some changes mentioned on the list to it before 2015r comes out with those changes plus other changes, they should call the resulting files something other than "2015q" or "2015r")?

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