- tz - lists.iana.org

How to compute the moment of the next DST change
by Simon Perreault April 4, 2013

April 4, 2013

Dear time experts, I want to write a cron job or similar that activates one week prior to daylight saving time changes. (Or, more generically, one week prior to any time jumps, for any reason, DST or else.) Any pointers? I have looked at the usual places: POSIX time functions, various date/time modules on CPAN, etc. Nothing seems to do that computation. Do I need to parse the tz database myself? Thanks, Simon

14 20

Ambiguous abbreviations for Australian timezones when daylight savings is in affect
by Timothy Arceri April 4, 2013

April 4, 2013

Hi All, I’d like to bring this very important issue back up for discussion. I’m going to attempt to address the reason why this change is needed as clearly as possible while addressing the concerns from previous discussions. The issue is with both EST (Tasmania, Victoria, New South Wales, Queensland) and CST (South Australia, Northern Territory) It's well past time the Australian abbreviations were updated to reflect the current terms and usage. Stop the confusion and use the abbreviations recommended by the Australian government to try to avoid this mess. http://australia.gov.au/about-australia/our-country/time#daylightsaving As others have posted I’m not too concerned about the 'A' but as you will see differentiating between daylight savings times is extremely important when you are using this information in a system that crosses state boundaries and in our case an emergency warning system. Previous Post: --------------------- “I'm not a big fan of change for change's sake; once the database is one way I like to leave it alone. For phrases, the new statistics seem to be quite strong; for whatever reason, Australians seem to be voting with their feet (or fingers) and are adopting American terminology with an "Australian", when the time zone names are spelled out. For abbreviations, it's not clear whether "AEDT" or "EDT" is more common, though I suppose "AEDT" has a slight edge. I'd like to hear more from Australian correspondents on this before thinking about specific changes, though.” - Paul Eggert (26 Aug 2008) I don’t think anyone here cares deeply enough about time zone abbreviations enough to be arguing about change for change’s sake. The fact is the ambiguity of the current abbreviations for time zones is causing real world problems. Previous Post: --------------------- “Alphabetic time zone abbreviations should not be used as unique identifiers for UTC offsets as they are ambiguous in practice. For example, "EST" denotes 5 hours behind UTC in English-speaking North America, but it denotes 10 or 11 hours ahead of UTC in Australia; and French-speaking North Americans prefer "HNE" to "EST".” - Paul Eggert (26 Aug 2008) The issue is not that the identifiers are not unique worldwide. The problem is that they are not unique to bordering states in the same country which run along the same time zone. Most apply daylight savings time, one (Queensland) does not, this is what causes the confusion. Simply using UTC +10 or UTC +11 is not good enough as the general public has no idea what UTC is. Previous Post: --------------------- “I have always assumed that the common abbreviation (EST for standard time, and EST for summer time) was a very deliberate choice, chosen so that if it ever was appropriate to specify a time with an abbreviated zone name, then the time specified would apply year around, which is almost always what is intended” - Robert Elz (5 Jan 2009) If all states that used EST applied daylight saving then this would be convenient but as stated above they do not. The problem can be seen in the delivery example where it would appear an Australian company does delivery’s via time travel. Previous Post: --------------------- “Queensland don't have Daylight Saving Time. New South Wales (across the border from Queensland) do have Daylight Saving Time. Due to the fact that the Olsen data uses EST for both 'Eastern Summer Time' (New South Wales) and 'Eastern Standard Time' (Queensland), a delivery from New South Wales to Queensland can have a pickup time of 10.30am EST and a delivery time of 10.00am EST. We like to be efficient but we're not that good. System users only see the EST and get horribly confused.” - Mick Johnston (26 Aug 2008) So obviously I’m pushing this for my own reason also. We currently use unix based systems to produce tsunami arrival times for the Australian Tsunami Warning System. This information is displayed on a public webpage (and as described above cannot use UTC convention). The issue comes into play when listing arrival times for the east coast of Australia, simply listing all arrival times as EST will obviously cause confusion especially for towns located near the border of NSW/QLD where it would appear to take a tsunami an extra hour to arrive only a couple of kilometres away. Currently we cannot use the default unix time zone commands and must rely on the use of a script to parse the time zone files and produce EST/EDT abbreviations. Obviously the ideal solution is to fix the EST/CST abbreviations once and for all so the all Australians can finally have software that produces time zones abbreviations that can be read by the general public and be used without having to provide added context. Note: In our organisation alone this issue has been brought up independently by multiple areas. Timothy Arceri

28 98

Acronyms - localization - more CLDR failures
by Tobias Conradi April 3, 2013

April 3, 2013

On Wed, Apr 3, 2013 at 12:56 AM, Derick Rethans <tz(a)derickrethans.nl> wrote: >> I disagree. I think it's natural to want to abbreviate, especially >> with things that are repeated a lot. > > But that has to be done in a localized way anyway. With the default local being English in the IANA time zone database. > In the Netherlands, > nobody uses CEST or CET, but rather MEZT and MET... Sure? https://www.google.com/search?q=cet+central+site%3Anl And CLDR does not even have MEZT and MET for the Dutch language as you claim is exclusively used in the Netherlands: http://www.unicode.org/repos/cldr/trunk/common/main/nl.xml <metazone type="Europe_Central"> <long> <generic>Midden-Europese tijd</generic> <standard>Midden-Europese standaardtijd</standard> <daylight>Midden-Europese zomertijd</daylight> </long> <short> <generic>CET</generic> <standard>CET</standard> <daylight>CEST</daylight> </short> </metazone> > but the tz database > doesn't have those either. The localization and naming is done very well > in CLDR. Counter evidence (Failure on Mexico / Tiempo del Pacifico) has been shown. > I have implemented the Date/Time support (utilizing this > database) in PHP, and have given many presentations about the subject. Ever in front of Mexicans showing Spanish localization for Mexico or in front of Dutch speakers showing Dutch localization for Central Europe? > I > always hammer in two things: .... never > rely or use an abbreviation for anything. Why not? CET in the context of Europe always refers to "Central European Time", doesn't it? Same may go for WAT in Africa and West Africa Time. As seen with AxT representing AxST/AxDT in Australia, the acronyms are not all usable in the IANA time zone database, but duplicating information and inventing new IDs like Europe_Central (=CET), America_Pacific (US and CA = America?) as is done in http://unicode.org/repos/cldr/trunk/common/supplemental/metaZones.xml seems like creating a field for having more bugs. Let's check Shanghai: http://en.wikipedia.org/wiki/Time_in_China In mainland China standard time is called Beijing Time (北京时间) https://www.google.com/search?q="北京时间" ~ 57 mio results http://unicode.org/repos/cldr/trunk/common/supplemental/metaZones.xml <timezone type="Asia/Shanghai"> <usesMetazone mzone="China"/> </timezone> http://www.unicode.org/repos/cldr/trunk/common/main/zh.xml <metazone type="China"> <long> <generic>中国时间</generic> <standard>中国标准时间</standard> <daylight>中国夏令时间</daylight> </long> </metazone> 中国 = China https://www.google.com/search?q="中国时间" ~ 1 mio results https://www.google.com/search?q="中国标准时间" ~ 230 000 results http://www.unicode.org/repos/cldr/trunk/common/main/en.xml <metazone type="China"> <long> <generic>China Time</generic> <standard>China Standard Time</standard> <daylight>China Daylight Time</daylight> </long> </metazone> No acronyms at all! -- Tobias Conradi Rheinsberger Str. 18 10115 Berlin Germany http://tobiasconradi.com/

1 0

A failure - CLDR as an IANA time zone database extension for Mexico
by Tobias Conradi April 2, 2013

April 2, 2013

Tiempo del Pacifico http://es.wikipedia.org/wiki/Zonas_horarias_de_M%C3%A9xico#Tiempo_del_Pac.C… Tiempo del Pacifico -6/-7 confirmed by http://www.cenam.mx/hora_oficial/ Tiempo del Pacífico = UTC(CNM) – (N+1) Donde N es 6 horas para el horario de invierno y 5 horas para el horario de verano. ==Test 1 - Tijuana== The only Pacific that I can find in http://www.unicode.org/repos/cldr/trunk/common/main/es.xml outside the Area/Locations names are in that section: <metazone type="America_Pacific"> <long> <generic>Hora del Pacífico</generic> <standard>Hora estándar del Pacífico</standard> <daylight>Hora de verano del Pacífico</daylight> </long> </metazone> An example zone for America_Pacific from http://unicode.org/repos/cldr/trunk/common/supplemental/metaZones.xml mapZone other="America_Pacific" territory="MX" type="America/Tijuana"/ Look America/Tijuana up in ftp://ftp.iana.org/tz/data/zone.tab America/Tijuana US Pacific Time - Baja California near US border ftp://ftp.iana.org/tz/data/northamerica -8:00 Mexico P%sT 2010 -8:00 US P%sT ==Example 2 - Hermosillo== ftp://ftp.iana.org/tz/data/zone.tab America/Hermosillo Mountain Standard Time - Sonora -7:00 Mexico M%sT 1999 -7:00 - MST That is "Tiempo del Pacífico", using http://www.cenam.mx/hora_oficial/ Tiempo del Pacífico = UTC(CNM) – (N+1) Donde N es 6 horas para el horario de invierno .... http://unicode.org/repos/cldr/trunk/common/supplemental/metaZones.xml <timezone type="America/Hermosillo"> <usesMetazone to="1970-01-01 08:00" mzone="America_Pacific"/> <usesMetazone from="1970-01-01 08:00" mzone="America_Mountain"/> </timezone> http://www.unicode.org/repos/cldr/trunk/common/main/es.xml <metazone type="America_Mountain"> <long> <generic>Hora de las Montañas</generic> <standard>Hora estándar de Montaña</standard> <daylight>Hora de verano de Montaña</daylight> </long> </metazone> -- Tobias Conradi Rheinsberger Str. 18 10115 Berlin Germany http://tobiasconradi.com/

3 2

Scheduling - use case for acronyms
by Tobias Conradi April 2, 2013

April 2, 2013

Was: [tz] Ambiguous abbreviations for Australian timezones when daylight savings is in affect On Tue, Apr 2, 2013 at 7:08 PM, Russ Allbery <rra(a)stanford.edu> wrote: > Humans don't need the abbreviation and don't care. False - as numerous emails and usages demonstrate. > They either schedule > the meeting in local time That might be unknown or ambiguous. > or in the current time in some other time zone Exactly, and that would be communicated how, in a brief manner - as Mark used in "Mondays at 8:00 PT" > (or possibly in UTC) UTC might be unknown at time of scheduling or not decipherable by the receiver. -- Tobias Conradi Rheinsberger Str. 18 10115 Berlin Germany http://tobiasconradi.com/

3 4

Blame it on Caesar, talk from PyCon 2013
by Stuart Bishop April 2, 2013

April 2, 2013

People on this list may be interested in this talk from PyCon 2013, available on YouTube at http://www.youtube.com/watch?v=GBKqRhn0ekM In it Lennart Regebro provides an overview of historical calendars before moving onto the modern real world issues developers face when dealing with calendaring. -- Stuart Bishop <stuart(a)stuartbishop.net> http://www.stuartbishop.net/

1 0

Australian Timezone Abreviations (Daylight Savings Time) [SEC=UNOFFICIAL]
by Peter Stagg March 31, 2013

March 31, 2013

I have resently had the clasic issue at work with strftime returning only EST, CST (Standard Time) etc. as the timezone abreviation for Australian time zones even when where in daylight savings time. Given that the Australian Government now has offical advice as to what these abreviations should be <http://australia.gov.au/about-australia/our-country/time#daylightsaving> would it not be possible to include them in the data now? Regards, Peter Stagg | Web Developer, Radar Systems Bureau of Meteorology Australian Meteorological Data Information Services System (AMDISS) Bureau of Meteorology GPO Box 1289 Melbourne VIC 3001 Level 6, 700 Collins Street, Docklands VIC 3008 Tel: +61 3 9669 4232 | Fax: +61 3 9669 4128 www.bom.gov.au

15 19

Ukraine time changes
by Michael Hustwait March 25, 2013

March 25, 2013

Hi there As a reader of your website I understand ukraine is due to scrap dst from end march 2013 and stay on winter trime permanently Is this still the case? Regards Michael Hustwait Watford London England

3 2

Praguay DST Update
by Juan Carlos YJ. Lin March 25, 2013

March 25, 2013

Dear Paul Eggert I will like to contribute to update Paraguay DST timezone info. At 2013-b (Released 2013-03-11 ) Paraguay DST is set as no permanent change. Since there is a decree 10.780 ( 2013-03-15 ) that make the change permanent, the database should be updated. Summary # From Juan Carlos YJ Lin ( 2013-03-25 ) # A decree by President was issued in Paraguay (no. 10780) on 2013-03-15 that changed the # DST method to be from the first Sunday in October to the fourth Sunday in March (60 minutes) # So the change is permanent. Attached the decree pdf issued by Paraguay President You can find it out in by searching 10780 decree at http://www.presidencia.gov.py/decretos.php Juan Carlos Lin Unisoft S.A. +595-993-288330 --------------------------------------------------- "Antes de imprimir, recuC)rdese de su compromiso con el Medio Ambiente" "Aviso: Este mensaje es dirigido para su destinatario y contiene informaciones que no pueden ser usadas por otras personas que no sean su(s) destinatario(s). La retransmisiC3n del contenido no estC! autorizada fuera del contexto de su envC-o y a quien corresponde. El uso no autorizado de la informaciC3n en este mensaje se halla penado por las leyes vigentes en todo el mundo. Si ha recibido este mensaje por error, por favor bC3rrala y notifique al remitente en la brevedad posible. El contenido de este mensaje no es responsabilidad de la Empresa y debe ser atribuido siempre a su autor. Gracias."

2 1

Paraguay DST Changes
by Juan Carlos YJ. Lin March 25, 2013

March 25, 2013

Dear Paul Eggert I will like to contribute to update Paraguay DST timezone info. At 2013-b (Released 2013-03-11) Paraguay DST is set as no permanent change. Since there is a decree 10.780 (2013-03-15) that make the change permanent, the database should be updated. Summary # From Juan Carlos YJ Lin (2013-03-25) # A decree by President was issued in Paraguay (no. 10780) on 2013-03-15 that changed the # DST method to be from the first Sunday in October to the fourth Sunday in March (60 minutes) # So the change is permanent. Attached the decree pdf issued by Paraguay President You can find it out in by searching 10780 decree at http://www.presidencia.gov.py/decretos.php JUAN CARLOS YJ LIN Tecnología de la Información MONALISA Internacional SA Boquerón 310 Ciudad del Este – PARAGUAY Tel + 595 61 500 645 Fax + 595 61 512 695 lin(a)monalisa.com.py www.monalisa.com.py --------------------------------------------------- "Antes de imprimir, recuérdese de su compromiso con el Medio Ambiente" "Aviso: Este mensaje es dirigido para su destinatario y contiene informaciones que no pueden ser usadas por otras personas que no sean su(s) destinatario(s). La retransmisión del contenido no está autorizada fuera del contexto de su envío y a quien corresponde. El uso no autorizado de la información en este mensaje se halla penado por las leyes vigentes en todo el mundo. Si ha recibido este mensaje por error, por favor bórrala y notifique al remitente en la brevedad posible. El contenido de este mensaje no es responsabilidad de la Empresa y debe ser atribuido siempre a su autor. Gracias."

1 0

Turkey DST time
by Serkan Kaba March 25, 2013

March 25, 2013

Hi, The time at night where Turkey switches to DST is different from rest of the Europe. Please check http://www.timeanddate.com/worldclock/clockchange.html?n=19&year=2013 for details. Regards, Serkan

3 3

Re: [tz] Turkey DST time
by Serkan Kaba March 25, 2013

March 25, 2013

Merhaba, Yes apparently that's the case. Thanks for validating this. There are plans for fixing the timezone to UTC+3 in 2014 but we'll see. Regards, Serkan ________________________________ From: Even Scharning <tzdb(a)time.is> To: Serkan Kaba <serkan_kaba(a)yahoo.com> Sent: Monday, March 25, 2013 7:05 AM Subject: Re: [tz] Turkey DST time Merhaba Serkan, Turkey is constantly one hour ahead of most of Europe, but the DST switch occurs simultaneously in Turkey and Europe. The rules in the Time Zone Database are correct. This page illustrates the upcoming DST switch: http://time.is/compare/0000_31_Mar_2013_UTC/CET/Turkey Sincerely, Even Scharning Time.is - exact time, any time zone http://time.is/ On 2013-03-25 7:18, Serkan Kaba wrote: > Hi, > > The time at night where Turkey switches to DST is different from rest > of the Europe. Please check > http://www.timeanddate.com/worldclock/clockchange.html?n=19&year=2013 > [1] for details. > > Regards, > Serkan

1 0

Chile DST
by Carlos Moffat March 22, 2013

March 22, 2013

Hi Guys, It looks like the announcment of 2013-B has Chile going from GMT-3 to GMT-4 on April 23rd and the opposite on Sep 2nd. However, the correct dates are April 28th and Sep 7th. An official source for this stuff in Chile is the Navy's "Hora Oficial" website: http://www.horaoficial.cl/cambio.htm All the best, Carlos

2 2

Missing functionality (general question) - C11 functions, Localization, etc...
by random832＠fastmail.us March 21, 2013

March 21, 2013

In working on a windows/MSVC port of tzcode, I have run into the issue of functions that MSVCRT implements that tzcode does not, and the question of how much of it to implement. Part of the reason you haven't heard anything more from me even though I've had the code itself building for weeks is that it's hard to really determine when I can declare it "finished". Some of it are newer standard functions (wcstime from C95, localtime_s from C11), some are functions created by microsoft that no-one else has (_dstbias to match timezone and daylight, _mkgmtime which is their name for timegm, _wctime which is a wide character version of ctime), some of it is an artifact of them simultaneously supporting 32- and 64-bit time_t, and some of it are old unix functions (e.g. ftime) that MS happens to implement and tzcode does not. Some of these functions are problematic to implement in a third-party library. The means by which localtime_s and others in that family are meant to call their error handlers is not specified in C11, and MSVC uses a different (and nonstandard even though the standard was proposed by microsoft) mechanism from slibc. There's also miscellaneous other bits of missing functionality. strftime provides some localization functionality for months and weekdays, but not for e.g. %E and %O or for timezone abbreviations. Also, since the tzdata file format itself contains no provision for localization, I can't think of any C implementation that _does_ implement localized timezone abbreviations (I think there are some in other languages that use the tz data in combination with the CLDR data) As an aside, support for localized timezone abbreviations might be a solution to the AEST/EST half of the australian timezone debate. I get the impression (based on a comment in the section on Canadian timezones) that it was decided in 1994 that localization would be someone else's problem, and this was never revisited, nor actually became anyone else's problem. More than this, my main question is - what is the role of tzcode - the library functions, that is, not the tools - itself? Is it simply a reference implementation, to be used by libc maintainers and integrated into their libraries as they see fit? Is it meant to be used as a drop-in replacement for the system libc's time functions by application developers who need consistent timezone handling? In short - is there a roadmap for adding new functionality to tzcode, and/or is there any reason _not_ to do so besides not having anyone volunteering to work on it (I can look at it, but I don't want to if it's going to be rejected, or if there's no point) -- Random832

3 5

Error with America/Santiago?
by Jonathan Berger March 15, 2013

March 15, 2013

I originally mailed tz(a)elsie.nci.nih.gov, the address listed at the top of http://www.twinsun.com/tz/tz-link.htm but the address bounced. Is this the correct email address? Hello, I believe there might be an error with the definition for 'America/Santiago'. Actual Behavior As of March 12, 2013 at 10:30pm UTC the tz database reports 'America/Santiago' to be CLT-0400. Expected Behavior >From looking at Wikipedia, WorldTime.com, and TimeAndDate.com, all three agree that 'America/Santiago' should be at CLST-0300 for March 12, 2013 at 10:30pm UTC. I'm basing this report on the version of the tz database included in the Python library pytz-2012j which was released on 2013-01-03. I have not yet checked the source tz database files. I'm hoping someone on this list can help. Thanks, Jonathan

5 5

Paraguay DST ends earlier
by Steffen Thorsen March 15, 2013

March 15, 2013

A user tipped us that Paraguay will end DST on 2013-03-24 00:00. We've been able to find a government source that confirms this, along with news from media, but the final decree might not be out yet. They do not tell if this will be a permanent change or just this year. Government source (Spanish): http://www.ande.gov.py/interna.php?id=1075 Translated by Google: "The president of the Directors National of Electricity (ANDE), Carlos Heisele, announced the change of schedule for the next 24 March, with which the clocks of the country should fall behind 60 minutes . This action is performed normally in the second week of the month of April, however forward the change of schedule by request of the citizens." We will keep this page updated: (Permanent link, English) http://www.timeanddate.com/news/time/paraguay-dst-march-2013.html Best regards, Steffen Thorsen - timeanddate.com

3 4

Haiti on DST
by Steffen Thorsen March 14, 2013

March 14, 2013

It appears that Haiti is observing DST this year as well, same rules as US/Canada. They did it last year as well, and it looks like they are going to observe DST every year now (based on the sources listed below). A user tipped us, we found these sources that verifies it: http://radiovision2000haiti.net/public/haiti-avis-changement-dheure-dimanch… http://www.canalplushaiti.net/?p=6714 Best regards, Steffen Thorsen - timeanddate.com

10 13

windows [MSVC] port progress
by random832＠fastmail.us March 13, 2013

March 13, 2013

I've made a makefile that can build the library functions (64-bit time_t only, and haven't done anything yet about MSVCRT functions showing up through names that tzcode doesn't define such as localtime_s or _ftime [or the 32-bit names]), and successfully compiled zdump. I was wondering if anyone had any ideas which approach would be best for implementing the 32-bit functions. Some background: MSVC defines two sets of time functions: for 32-bit and 64-bit time_t. But some functions (e.g. tzset and strftime) are shared between them. (VC2003 defines the default names as 32-bit, and I don't know if VC6 has the 64-bit functions at all - making it work on these versions may be somewhat more difficult) I could: A. Compile separate 32 and 64 bit versions of the library (what happens if a single program tries to call both?) B. Compile a single library with 32 and 64 bit versions of functions, a custom tzset function that calls both (this will pull in most of the 64-bit library when compiling a 32-bit program, but I can avoid pulling in the 32-bit objects when compiling a 64-bit program) C. Write wrapper 32-bit functions for 64-bit functions - a bit less bloated than solution B, but more work. D. ??? I want to eventually customize tzset anyway, to get the local time zone from the system settings when TZ is not set (CLDR contains a mapping from Windows time zone names to tzdata ones). Speaking of which, does anyone on the list have a non-English version of Windows to test something with?

1 0

DST in the news
by Arthur David Olson March 12, 2013

March 12, 2013

After the weekend start of DST in the US, "Metro riders pay for extended peak period" per the Washington (DC) Post: http://www.washingtonpost.com/local/trafficandcommuting/metro-riders-pay-fo… @dashdashado

3 2

[PATCH] Update URLs in tz-link page.
by Paul Eggert March 11, 2013

March 11, 2013

* tz-link.htm: Add URLs for webOS, BB10, iOS. Update URL for Solaris. Mention Internet RFC 6557. Update Internet RFCs 2445->5545, 2822->5322. Switch from FTP to HTTP for Internet RFCs. --- tz-link.htm | 35 ++++++++++++++++++----------------- 1 file changed, 18 insertions(+), 17 deletions(-) diff --git a/tz-link.htm b/tz-link.htm index 67b2433..5e24fed 100644 --- a/tz-link.htm +++ b/tz-link.htm @@ -8,7 +8,7 @@ <meta http-equiv="Content-type" content='text/html; charset="US-ASCII"'> <meta name="DC.Creator" content="Eggert, Paul"> <meta name="DC.Contributor" content="Olson, Arthur David"> -<meta name="DC.Date" content="2013-02-21"> +<meta name="DC.Date" content="2013-03-11"> <meta name="DC.Description" content="Sources of information about time zones and daylight saving time"> <meta name="DC.Identifier" @@ -37,8 +37,8 @@ is used by several implementations, including <a href="http://www.gnu.org/software/libc/">the <abbr title="GNU's Not Unix">GNU</abbr> -C Library</a> used in -<a href="http://www.linux.org/"><abbr>GNU</abbr>/Linux</a>, +C Library</a> (used in +<a href="http://www.linux.org/"><abbr>GNU</abbr>/Linux</a>), <a href="http://www.android.com/">Android</a>, <a href="http://www.freebsd.org/">FreeBSD</a>, <a href="http://netbsd.org/">NetBSD</a>, @@ -46,11 +46,14 @@ C Library</a> used in <a href="http://cygwin.com/">Cygwin</a>, <a href="http://www.delorie.com/djgpp/"><abbr title="DJ's GNU Programming Platform">DJGPP</abbr></a>, +<a href="http://en.wikipedia.org/wiki/WebOS">webOS</a>, <a href="http://ibm.com/aix">AIX</a>, +<a href="http://en.wikipedia.org/wiki/BlackBerry_10">BlackBerry 10</a>, +<a href="http://www.apple.com/ios/">iOS</a>, <a href="http://h71000.www7.hp.com/">OpenVMS</a>, <a href="http://oracle.com/database">Oracle Database</a>, <a href="http://www.apple.com/osx/">OS X</a>, -<a href="http://sun.com/software/solaris">Solaris</a>, +<a href="http://oracle.com/solaris">Solaris</a>, <a href="http://h30097.www3.hp.com/">Tru64</a>, and <a href="http://sco.com/products/unixware">UnixWare</a>.</p> <p> @@ -123,7 +126,10 @@ messages</a> sent to the mailing list, <a href="https://mm.icann.org/mailman/listinfo/tz">subscribe</a> to it, and browse the <a href="http://mm.icann.org/pipermail/tz/">archive of old -messages</a>.</p> +messages</a>. For further information about updates, please see +<a href="http://tools.ietf.org/html/rfc6557">Procedures for +Maintaining the Time Zone Database</a> (Internet <abbr title="Request +For Comments">RFC</abbr> 6557).</p> <p> The Web has several other sources for time zone and daylight saving time data. Here are some links that may be of interest. @@ -159,14 +165,9 @@ tz data files.</li> </ul> <h2>Other time zone database formats</h2> <ul> -<li>The <a href="ftp://ftp.rfc-editor.org/in-notes/rfc2445.txt"> +<li>The <a href="http://tools.ietf.org/html/rfc5545"> Internet Calendaring and Scheduling Core Object Specification -(iCalendar)</a>, Internet <abbr title="Request For -Comments">RFC</abbr> 2445, published by the (now-concluded) <a -href="http://ietf.org/html.charters/OLD/calsch-charter.html"><abbr -title="Internet Engineering Task Force">IETF</abbr> -Calendaring and Scheduling Working Group (<abbr -title="Calendaring and Scheduling Working Group">calsch</abbr>)</a> +(iCalendar)</a>, Internet <abbr>RFC</abbr> 5445 covers time zone data; see its VTIMEZONE calendar component. <a href="http://calconnect.org/">CalConnect, The Calendaring and Scheduling @@ -513,7 +514,7 @@ Time Protocol</a> discusses how to synchronize clocks of Internet hosts.</li> <li><a -href="ftp://ftp.rfc-editor.org/in-notes/rfc4833.txt">Timezone +href="http://tools.ietf.org/html/rfc4833">Timezone Options for <abbr title="Dynamic Host Configuration Protocol">DHCP</abbr></a> (Internet <abbr>RFC</abbr> 4833) specifies a <a @@ -590,13 +591,13 @@ interchange -- Representation of dates and times</a>.</li> Schema: Datatypes - dateTime</a> specifies a format inspired by <abbr>ISO</abbr> 8601 that is in common use in XML data.</li> <li> -<a href="ftp://ftp.rfc-editor.org/in-notes/rfc2822.txt">Internet -Message Format</a> (Internet <abbr>RFC</abbr> 2822) §3.3 +<a href="http://tools.ietf.org/html/rfc5322">Internet +Message Format</a> (Internet <abbr>RFC</abbr> 5322) §3.3 specifies the time notation used in email and <a -href="ftp://ftp.rfc-editor.org/in-notes/rfc2616.txt"><abbr>HTTP</abbr></a> +href="http://tools.ietf.org/html/rfc2616"><abbr>HTTP</abbr></a> headers.</li> <li> -<a href="ftp://ftp.rfc-editor.org/in-notes/rfc3339.txt">Date and Time +<a href="http://tools.ietf.org/html/rfc3339">Date and Time on the Internet: Timestamps</a> (Internet <abbr>RFC</abbr> 3339) specifies an <abbr>ISO</abbr> 8601 profile for use in new Internet -- 1.7.10.4

1 0

Re: [tz] Haiti on DST
by Steve Jones March 10, 2013

March 10, 2013

At 09:33 3/10/2013, Steffen Thorsen wrote: >It appears that Haiti is observing DST this year as well, same rules >as US/Canada. >They did it last year as well, and it looks like they are going to >observe DST every year... So, the island of Hispaniola is divided in its DST observance. The Dominican Republic does not observe DST. Before this change, crossing the Haiti/DR border meant a transition between UTC-4 and UTC-5 all year long. Now, during DST, they are both UTC-4. Regards, Steve Jones OnTimeZone.com

1 0

Ukraine Time Change
by Wong Ren March 10, 2013

March 10, 2013

Alexander Krivenyshev had written: "The Ministry of Economic Development and Trade of Ukraine has submitted a bill to abolish the daylight saving time. If approved, new bill will go into effect on March 1, 2013 and Ukraine will use UTC+2 year around" Does anyone know what will be new time zone abbreviation since Ukraine used to have EET ? Also, the tz2013a does not have the Ukraine time change, was the bill approved and any update soon? Regards, Ren Wong ________________________________ "This e-mail message may contain confidential, commercial or privileged information that constitutes proprietary information of Comverse Technology or its subsidiaries. If you are not the intended recipient of this message, you are hereby notified that any review, use or distribution of this information is absolutely prohibited and we request that you delete all copies and contact us by e-mailing to: security(a)comverse.com. Thank You."

3 2

Cuba DST start as US/Canada
by Steffen Thorsen March 9, 2013

March 9, 2013

FYI: Granma, the official organ of the government confirms a 2013-03-10 DST start this year. The database already assumes this, so no change is necessary, but Cuba has had different rules the past two years, so it was not obvious that this would be the start date this year. http://www.granma.cubaweb.cu/2013/03/04/nacional/artic10.html Best regards, Steffen Thorsen - timeanddate.com

3 2

Re: [tz] tzcode for windows?
by random832＠fastmail.us March 8, 2013

March 8, 2013

On Fri, Mar 8, 2013, at 15:53, Arthur David Olson wrote: > > Haven't looked at zdump yet, and it's less useful without the library > > functions anyway. > > In theory at least, zdump is independent of everything else in the package; > > as long as the functions it calls are available all should be well. Well, yes, but it's just dumping the MSVC implementation of timezones, which is less useful than if I could get it to link against the tzcode library. I did have to switch from environ-manipulation to putenv (need to make it do that conditionally then I'll make a patch) and call tzset. How exactly was it working before without ever calling tzset? Am I missing something? Or is it just that most unix implementations, and the tzcode implementation, happen to be tolerant of calling localtime without calling tzset?

1 0

Timezones Morocco 2013 incorrect
by Erik Homoet March 7, 2013

March 7, 2013

Hi, For our internet airline booking engine of flights we¹re using the tzdata2012j version. In this version the DST timing for Morroco is not correct. We¹re facing a lot of problems because of this, this because a large amount of flights are departing from Morocco between 23:00 and 24:00. Morocco is also on Wintertime during the month of Ramadan. The correct timezone should be: WET DST starts on Sunday, 28 April 2013, 02:00 local standard time. DST ends on Tuesday, 9 July 2013, 03:00 local daylight time. DST starts on Thursday, 8 August 2013, 02:00 local standard time. DST ends on Sunday, 29 September 2013, 03:00 local daylight time. Source: http://www.timeanddate.com/worldclock/city.html?n=60 Would you please be so kind to give me an indication when this can be changed? Best regards and thanks, Erik Erik Homoet Business Consultant quintessence consulting AMS mobile: +31 614534022 email: ehomoet(a)quintessence.net skype: erik_qc_ams

8 18