July 2015 - tz - lists.iana.org

[PROPOSED PATCH 1/2] * southamerica: Give source for 1965 Venezuela transition.
by Paul Eggert July 30, 2015

July 30, 2015

--- southamerica | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/southamerica b/southamerica index dcc063f..dd9235f 100644 --- a/southamerica +++ b/southamerica @@ -1734,6 +1734,10 @@ Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28 # Venezuela # +# From Paul Eggert (2015-07-28): +# For the 1965 transition see Gaceta Oficial № 27.619 (1964-12-15), p 205.533 +# http://www.pgr.gob.ve/dmdocuments/1964/27619.pdf +# # From John Stainforth (2007-11-28): # ... the change for Venezuela originally expected for 2007-12-31 has # been brought forward to 2007-12-09. The official announcement was @@ -1745,6 +1749,6 @@ Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28 # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Caracas -4:27:44 - LMT 1890 -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time? - -4:30 - VET 1965 # Venezuela Time + -4:30 - VET 1965 Jan 1 0:00 # Venezuela T. -4:00 - VET 2007 Dec 9 3:00 -4:30 - VET -- 2.1.4

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Uruguay out of DST
by J J July 24, 2015

July 24, 2015

>> >>* Source: http://www.camtur.com.uy/index.php/noticias/281-se-derogo-decreto-del-cambi… <http://www.camtur.com.uy/index.php/noticias/281-se-derogo-decreto-del-cambi…> * >> That is a press release published by an organization lobbying for the change, >> and surely such a source is less reliable than the newspapers we're already citing. >> The whole thing is very mysterious, at least to this outsider. Here is the decree signed by the president of Uruguay, on presidency website, http://archivo.presidencia.gub.uy/sci/decretos/2015/06/cons_min_201.pdf

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Uruguay out of DST
by Steffen Thorsen July 24, 2015

July 24, 2015

According to media in Uruguay, it looks like they will not be using DST the coming summer: http://www.elobservador.com.uy/gobierno-resolvio-que-no-habra-cambio-horari… http://www.republica.com.uy/este-ano-no-se-modificara-el-huso-horario-en-ur… It is a bit unclear if this is just this coming summer, or a permanent change. Our English summary (will be updated when we know more details): http://www.timeanddate.com/news/time/uruguay-stops-dst-2015.html Best regards, Steffen Thorsen - timeanddate.com

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Time Zone City for China
by 寇含军 July 23, 2015

July 23, 2015

Dear Sir or Madam, I have a question that bothered me for many years since I started to use the Linux systems. When we, Chinese users, are selecting the desired timezone for our Linux boxes, we always feel weird that there has been no "Asia/Beijing". Instead we see "Asia/Shanghai" or "Asia/Chongqing". This might by how IANA "thinks" what the China timezone convention is, but SERIOUSLY this is not what we, Chinese users, are expecting. We would be very happy to see "Asia/Beijing" among the list. I googled that this question has been asked in many places to different maintainers or distributors, and finally I figured out that IANA is the ultimate upstream who can fix this issue. As a matter of fact, if you take a look at the Windows time zone settings dialog, Beijing is in the list, but no Shanghai. Please add ""Asia/Beijing" to the list. Please take it into consideration and thank you very much! Best Regards, Hanjun Kou, an ordinary Chinese Linux user

7 15

Lack of "initial" transitions for some zones
by Jon Skeet July 22, 2015

July 22, 2015

I suspect this is just a matter of how the data has been specified, but it's a little odd... I'm looking at the output of zic for each zone, and almost all zones start with a "transition" for some timestamp in the long distant past - including fixed zones such as UTC and Etc/*. However, the legacy "root" zones of CET, EET, PST8PDT etc don't have this initial "transition" in the file - unless I'm misinterpreting it, which is always a possibility. Would it make sense to adjust either the data or zic to make all zic output (in the 8-byte-timestamp format, at least) cover all of time? I realize that this "extra" data (presumably an insertion of "standard time until the first transition") may well not be historically accurate - but I doubt that it would be any less accurate than other zones in a similar situation. Jon

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No DST for Uruguay since 2015
by Guillermo Pereyra July 20, 2015

July 20, 2015

http://archivo.presidencia.gub.uy/sci/decretos/2015/06/cons_min_201.pdf

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About the core city of a tz region
by David Patte ₯ July 20, 2015

July 20, 2015

I am curious about the protocol that tz uses to specify the name of each tz region. Is the core city in a region always the most populous city in the tz region? And what is done if a smaller city's population overtakes the named city? Is the zone renamed? Also, since historical data (pre-1970) is now maintained only for the named city in a region, does it not make sense to use the population as of 1970, since the historical records actually affected more people at that time?

4 4

Zone America/Glace_Bay
by Hank W. July 20, 2015

July 20, 2015

I just read in Wikipedia that Glace Bay, Nova Scotia, Canada existed only from 1901 to 1995. The government of Glace Bay was dissolved on 1 Aug 1995 when eight municipalities, including Glace Bay, were consolidated to form Cape Breton (a.k.a. CBRM, short for Cape Breton Regional Municipality), which is currently the second-most populous municipality in Nova Scotia after Halifax. Wikipedia shows Cape Bretons coordinates as 46° 9 north latitude by 60° 10 west longitude. That longitude corresponds to a local mean time of UTC-4:00:40. https://en.wikipedia.org/wiki/Glace_Bay https://en.wikipedia.org/wiki/Cape_Breton_Regional_Municipality Hank Wisniewski of Austin, Texas, U.S.A.

4 6

Type values in rules
by Jon Skeet July 20, 2015

July 20, 2015

Hi folks, It wasn't until last night that I first saw a non "-" entry for a type line - Australia/Adelaide had rules of Rule AS 1990 1994 even Mar Sun>=18 2:00s 0 - Rule AS 1990 1994 odd Mar Sun>=1 2:00s 0 - until release 2000f. Now in Noda Time I could probably support non-infinite rules with a fixed set of types (hopefully just odd and even), but it would be a bit of work. If type values are effectively obsolete, I may not bother. So, is it just coincidence that there have been no uses of the Type field in the released data since 2000f, or is this effectively policy now? (I can understand keeping the functionality for private usage, where others may use zic with their own data sets, but for Noda Time I'm not worried about that. Jon

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Full timezone names
by William Roberts July 20, 2015

July 20, 2015

Hi I'm currently using the tz data that comes with PHP. Is there a way of retrieving the full timezone name from the tz database, eg. Central European Time, Eastern Standard Time etc. So far I haven't been able to, so am using the CLDR repository which assigns a metazone to each timezone from the tz database, and from that I can get the full timezone name but it's not ideal as they don't always match exactly with the abbreviations from the tz data. Are there any plans to enable the full timezone names to be retrieved from the tz database the same way you would the abbreviations in PHP for example, or is getting them from the CLDR repository the best way to go about it? Thanks.

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