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[Patch] Make it slightly easier to parse tzdata
by Ed Schouten Nov. 2, 2014

Nov. 2, 2014

Hi there, Right now I am experimenting with trying to integrate the tzdata dataset into an embedded setup where I am not able to use zic(8) + /usr/share/zoneinfo. To summarize, my plan is to translate the entire tzdata into a set of C array/structure initializers (~50 KB for all timezones) and perform operations on those structures directly. While writing a Python script to translate the data, I noticed that there is a very small number of directives that would require quite a lot of additional code to parse properly. For example, "lastSun" makes a lot of sense as a special keyword in "Rule" directives, but it provides no functional gain in "Zone" directives. The same holds for the use of the "Dec 29 24:00" time used in Samoa's timezone. We should be able to use "Dec 30" instead, right? Anyway, I've attached a patch that should make it slightly easier to parse the tzdata files by removing these constructs. This should make it easier for people to reuse the dataset for other purposes. Thanks, -- Ed Schouten <ed(a)80386.nl>

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Venezuela may move back to UTC-4
by Paul Eggert Nov. 1, 2014

Nov. 1, 2014

Yesterday, President Nicolas Maduro ordered his vice president to review Venezuela's 2007 change from UTC-04:00 to UTC-04:30. Hugo Chavez, the previous president who ordered the change, argued that UTC-04:00 gave more light to poor children who walk to school before dawn through sometimes-dangerous streets. Maduro says he prefers later sunsets. For what it's worth, local mean time in Caracas is UTC-04:28. According to our (admittedly unreliable) records, Venezuela observed UTC-04:30 from 1912 through 1965, and observed UTC-04:00 from 1965 to 2007. My source: Reuters. Venezuela to reconsider Chavez's change in time zone. The Star 2014-11-01. http://www.thestar.com.my/News/World/2014/11/01/Venezuela-to-reconsider-Cha…

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[PROPOSED PATCH 1/4] * leapseconds.awk: Update the IERS's full name.
by Paul Eggert Nov. 1, 2014

Nov. 1, 2014

--- leapseconds.awk | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/leapseconds.awk b/leapseconds.awk index ee20ecc..bb81e96 100644 --- a/leapseconds.awk +++ b/leapseconds.awk @@ -15,8 +15,8 @@ BEGIN { print "# The NTP Timescale and Leap Seconds" print "# http://www.eecis.udel.edu/~mills/leap.html" print "" - print "# The International Earth Rotation Service periodically uses leap seconds" - print "# to keep UTC to within 0.9 s of UT1" + print "# The International Earth Rotation and Reference Systems Service" + print "# periodically uses leap seconds to keep UTC to within 0.9 s of UT1" print "# (which measures the true angular orientation of the earth in space); see" print "# Terry J Quinn, The BIPM and the accurate measure of time," print "# Proc IEEE 79, 7 (July 1991), 894-905 <http://dx.doi.org/10.1109/5.84965>." -- 1.9.1

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[PATCH] * asia (Asia/Seoul) correct DST.
by 정상혁 Oct. 31, 2014

Oct. 31, 2014

Hello, I would like to correct DST of Asia/Seoul in the tz. According to the Korean Wikipedia ( http://ko.wikipedia.org/wiki/%ED%95%9C%EA%B5%AD_%ED%91%9C%EC%A4%80%EC%8B%9C) , DST in Republic of Korean was as follows. 1948.06.01. 00:00 ~ 1948.09.13. 00:001949.04.03. 00:00 ~ 1949.09.11. 00:001950.04.01. 00:00 ~ 1950.09.10. 00:001951.05.06. 00:00 ~ 1951.09.09. 00:001955.05.05. 00:00 ~ 1955.09.09. 00:001956.05.20. 00:00 ~ 1956.09.30. 00:001957.05.05. 00:00 ~ 1957.09.22. 00:001958.05.04. 00:00 ~ 1958.09.21. 00:001959.05.03. 00:00 ~ 1959.09.20. 00:001960.05.01. 00:00 ~ 1960.09.18. 00:001987.05.10. 02:00 ~ 1987.10.11. 03:001988.05.08. 02:00 ~ 1988.10.09. 03:00 It almostly corresponds with the exsiting comments in 'asia' file. # From Annie I. Bang (2006-07-10): # http://www.koreaherald.co.kr/SITE/data/html_dir/2006/07/10/200607100012.asp # The Ministry of Commerce, Industry and Energy has already # commissioned a research project [to reintroduce DST] and has said # the system may begin as early as 2008.... Korea ran a daylight # saving program from 1949-61 but stopped it during the 1950-53 Korean War. And I checked old newspapers in Korean, all articles correspond with data in Wikipedia. For example, the article in 1948(Korean Language) proved that DST started at June 1 in that year. For another example, the article in 1988 said that DST started at 2:00 AM in that year. I tried to find simple rules to define DST, like 'SUN=>1', but cannot make it except 1957-1960. You can find the information in detail in the attached file. Thank you. Sanghyuk Jung, Senior Engineer Naver Corp. South Korea

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Moscow MSK Time Zone in 2014 changed again
by Evgeni Makarov Oct. 29, 2014

Oct. 29, 2014

Hi Due to regulations of the Russian parliament, MSK timezone changed again. please update files. Your latest fix is regarding president Medvedev changes. But Putin returned it back Now MSK is UTC+3 timezone, not +4. News: http://news.yahoo.com/russia-turns-back-clocks-permanent-winter-time-194148… http://www.timeanddate.com/news/time/russia-reintroduces-dst-2014.html In Russian: Moscow is returned to winter time: http://itar-tass.com/obschestvo/1333711 Kind regards Evgeni Makarov evgeni.makarov(a)gmail.com

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Repository for older tzdata/tzcode?
by Alain Petit Oct. 23, 2014

Oct. 23, 2014

Hi I would like to get a copy of the 2014f release. >From the iana site I am able to get the latest version [2014i] but I do not see a 'history' list/links making the 2014f version available. Where can I get such an earlier release? -Alain

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Donetsk and Lugansk Republics (UTC+2) may introduce Moscow time (UTC+3).
by Alexander Krivenyshev Oct. 23, 2014

Oct. 23, 2014

According to some news The Donetsk People's Republic (DPR or DNR) - self-proclaimed state in eastern Ukraine: http://en.wikipedia.org/wiki/Donetsk_People's_Republic is considering to introduce Moscow time on October 26, 2014 (from UTC+2 to UTC+3). Moscow is planning to change its time zone from current UTC+4 back to UTC+3 Donetsk republic to adopt Moscow time (Russian ITAR-TASS News Agency): "DNR plans to adjust its clocks to Moscow standard time, Zakharchenko said. “We will transit to our own time zone and will adopt it,” Zakharchenko said. “We will welcome in the New Year by Moscow standard time.”" http://en.itar-tass.com/world/755169 Litvinov: DND will take the law about moving to Moscow time on the last working day of the week: "The Parliament of the self-proclaimed Donetsk national Republic will pass a law about moving to Moscow time on the last working day of the week, informs the press center of the " new Russia " referring to the speaker of the Parliament DND Boris Litvinov." http://news.rin.ru/eng/news///68008/1/ DNI will switch to winter time together with Moscow: "The Prime Minister of the Republic considers that, in this way they will return to its historical zone. Prime Minister of the people's Republic, Alexander Zakharchenko Donetsk announced that 26 October they will switch to winter time together with Moscow." http://reflexion-shades.blogspot.com/2014/10/zakharchenko-dni-will-switch- to-winter.html DPR switches to Moscow time: " The DPR administration is going to introduce Moscow time on its territories, UNIAN reports." http://euroradio.fm/en/dpr-switches-moscow-time There are news in Russian, that The Lugansk People's Republic (LPR or LNR) - self-proclaimed state in eastern Ukraine http://en.wikipedia.org/wiki/Lugansk_People's_Republic is also considering to introduce Moscow time: (in Russian) Luhansk and Donetsk republic will go to Moscow time http://russian.rt.com/article/37119 http://dnr-news.com/dnr/6047-luganskaya-i-doneckaya-respubliki-pereydut-na- moskovskoe-vremya.html http://www.WorldTimeZone.com

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Re: [tz] Donetsk and Lugansk Republics (UTC+2) may introduce Moscow time (UTC+3).
by Matt Johnson Oct. 23, 2014

Oct. 23, 2014

It was done in 2014f. ________________________________ From: Alain Petit<mailto:alain.petit@oracle.com> Sent: ‎10/‎23/‎2014 8:00 AM To: tz(a)iana.org<mailto:tz@iana.org> Subject: Re: [tz] Donetsk and Lugansk Republics (UTC+2) may introduce Moscow time (UTC+3). Hi Regarding this portion from Alexander's mail > Moscow is planning to change its time zone from current UTC+4 >UTC+back >to UTC+3 Is this change part of 2014i that was announced yesterday? It seems to apply this week-end, and I did not see it in the notes. -alain -----Original Message----- From: Paul Eggert [mailto:eggert@cs.ucla.edu] Sent: Wednesday, October 22, 2014 12:15 AM To: Alexander Krivenyshev; tz(a)iana.org Subject: Re: [tz] Donetsk and Lugansk Republics (UTC+2) may introduce Moscow time (UTC+3). Given the fluidity of the situation and the difficulty of keeping up with what is actually happening on the ground, it may be better for those who prefer Moscow time to use TZ='Europe/Moscow'. That would resemble what has been done with Transnistria, which has worked reasonably well.

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[PROPOSED PATCH 1/4] * asia, backzone: Verify Trần 2005 and add sources.
by Paul Eggert Oct. 22, 2014

Oct. 22, 2014

I obtained a copy of Trần Tiến Bình's 2005 book "Lịch Việt Nam: thế kỷ XX-XXI (1901-2100)", verified that www.thoigian.com.vn's page is a verbatim quote of a passage in pages 45-50, and added a list of Trần's sources for his pp 49-50. --- asia | 25 +++++++++++++++++-------- backzone | 6 +++--- 2 files changed, 20 insertions(+), 11 deletions(-) diff --git a/asia b/asia index 851e6f8..37b2c88 100644 --- a/asia +++ b/asia @@ -2774,16 +2774,14 @@ Zone Asia/Tashkent 4:37:11 - LMT 1924 May 2 # The English-language name of Vietnam's most populous city is "Ho Chi Minh # City"; use Ho_Chi_Minh below to avoid a name of more than 14 characters. -# From Paul Eggert (2014-10-04) after a heads-up from Trần Ngọc Quân: +# From Paul Eggert (2014-10-21) after a heads-up from Trần Ngọc Quân: +# Trần Tiến Bình's authoritative book "Lịch Việt Nam: thế kỷ XX-XXI (1901-2100)" +# (Nhà xuất bản Văn Hoá - Thông Tin, Hanoi, 2005), pp 49-50, +# is quoted verbatim in: # http://www.thoigian.com.vn/?mPage=P80D01 -# lists helpful info, translated by Brian Inglis in: +# is translated by Brian Inglis in: # http://mm.icann.org/pipermail/tz/2014-October/021654.html -# The info cites an authoritative book by Trần Tiến Bình; a 2014 edition is -# "Lịch Việt Nam: thế kỉ XX-XXI (1901-2100) & niên biểu lịch sử Việt Nam" -# http://bookaholic.vn/lich-viet-nam-the-ki-xx-xxi-1901-2100-va-bien-bieu-lic… -# I have asked my library for its copy of the book (a 2005 edition) -# and plan to check that. In the meantime the summary in Thời gian is much -# better than Shanks, and is the basis for the following info. +# and is the basis for the information below. # # The 1906 transition was effective July 1 and standardized Indochina to # Phù Liễn Observatory, legally 104 deg. 17'17" east of Paris. @@ -2803,6 +2801,17 @@ Zone Asia/Tashkent 4:37:11 - LMT 1924 May 2 # To 07:00 on 1955-07-01 in South Vietnam. # To 08:00 on 1959-12-31 at 23:00 in South Vietnam. # To 07:00 on 1975-06-13 in South Vietnam. +# +# Trần cites the following sources; it's unclear which supplied the info above. +# +# Hoàng Xuân Hãn: "Lịch và lịch Việt Nam". Tập san Khoa học Xã hội, +# No. 9, Paris, February 1982. +# +# Lê Thành Lân: "Lịch và niên biểu lịch sử hai mươi thế kỷ (0001-2010)", +# NXB Thống kê, Hanoi, 2000. +# +# Lê Thành Lân: "Lịch hai thế kỷ (1802-2010) và các lịch vĩnh cửu", +# NXB Thuận Hoá, Huế, 1995. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Asia/Ho_Chi_Minh 7:06:40 - LMT 1906 Jul 1 diff --git a/backzone b/backzone index 1a7cc3e..29320aa 100644 --- a/backzone +++ b/backzone @@ -333,8 +333,8 @@ Link Asia/Chongqing Asia/Chungking # Vietnam # From Paul Eggert (2014-10-13): # See Asia/Ho_Chi_Minh for the source for this data. -# Trần's book is quoting as saying the 1954-55 transition to 07:00 -# in Hanoi was in October 1954, with exact date and time unknown. +# Trần's book says the 1954-55 transition to 07:00 in Hanoi was in +# October 1954, with exact date and time unspecified. Zone Asia/Hanoi 7:03:24 - LMT 1906 Jul 1 7:06:30 - PLMT 1911 May 1 7:00 - ICT 1942 Dec 31 23:00 @@ -391,7 +391,7 @@ Zone Asia/Tel_Aviv 2:19:04 - LMT 1880 # Laos # From Paul Eggert (2014-10-11): # See Asia/Ho_Chi_Minh for the source for most of this data. -# Trần's book is quoted as saying that Laos reverted to UT+7 on 1955-04-15. +# Trần's book says that Laos reverted to UT+7 on 1955-04-15. # Also, guess that Laos reverted to UT+7 on 1945-09-02, when Vietnam did; # this is probably wrong but it's better than guessing no transition. Zone Asia/Vientiane 6:50:24 - LMT 1906 Jul 1 -- 1.9.3

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[tz-announce] 2014i release of tz code and data available
by Paul Eggert Oct. 22, 2014

Oct. 22, 2014

The 2014i release of the tz code and data is available. It reflects the following changes, which were either circulated on the tz mailing list or are relatively minor technical or administrative changes: Changes affecting future time stamps Pacific/Fiji will observe DST from 2014-11-02 02:00 to 2015-01-18 03:00. (Thanks to Ken Rylander for the heads-up.) Guess that future years will use a similar pattern. A new Zone Pacific/Bougainville, for the part of Papua New Guinea that plans to switch from UTC+10 to UTC+11 on 2014-12-28 at 02:00. (Thanks to Kiley Walbom for the heads-up.) Changes affecting time zone abbreviations Since Belarus is not changing its clocks even though Moscow is, the time zone abbreviation in Europe/Minsk is changing from FET to its more-traditional value MSK on 2014-10-26 at 01:00. (Thanks to Alexander Bokovoy for the heads-up about Belarus.) The new abbreviation IDT stands for the pre-1976 use of UT+8 in Indochina, to distinguish it better from ICT (UT+7). Changes affecting past time stamps Many time stamps have been corrected for Asia/Ho_Chi_Minh before 1976 (thanks to Trần Ngọc Quân for an indirect pointer to Trần Tiến Bình's authoritative book). Asia/Ho_Chi_Minh has been added to zone1970.tab, to give tzselect users in Vietnam two choices, since north and south Vietnam disagreed after our 1970 cutoff. Asia/Phnom_Penh and Asia/Vientiane have been turned into links, as they differed from existing zones only for older time stamps. As usual, these changes affect pre-1970 time stamps only. Their old contents have been moved to the 'backzone' file. Changes affecting code The time-related library functions now set errno on failure, and some crashes in the new tzalloc-related library functions have been fixed. (Thanks to Christos Zoulas for reporting most of these problems and for suggesting fixes.) If USG_COMPAT is defined and the requested time stamp is standard time, the tz library's localtime and mktime functions now set the extern variable timezone to a value appropriate for that time stamp; and similarly for ALTZONE, daylight saving time, and the altzone variable. This change is a companion to the tzname change in 2014h, and is designed to make timezone and altzone more compatible with tzname. The tz library's functions now set errno to EOVERFLOW if they fail because the result cannot be represented. ctime and ctime_r now return NULL and set errno when a time stamp is out of range, rather than having undefined behavior. Some bugs associated with the new 2014g functions have been fixed. This includes a bug that largely incapacitated the new functions time2posix_z and posix2time_z. (Thanks to Christos Zoulas.) It also includes some uses of uninitialized variables after tzalloc. The new code uses the standard type 'ssize_t', which the Makefile now gives porting advice about. Changes affecting commentary Updated URLs for NRC Canada (thanks to Matt Johnson and Brian Inglis). Here are links to the release files: ftp://ftp.iana.org/tz/releases/tzcode2014i.tar.gz ftp://ftp.iana.org/tz/releases/tzdata2014i.tar.gz The files are also available via HTTP as follows: http://www.iana.org/time-zones/repository/releases/tzcode2014i.tar.gz http://www.iana.org/time-zones/repository/releases/tzdata2014i.tar.gz As usual, links to the latest release files are here: http://www.iana.org/time-zones/repository/tzcode-latest.tar.gz http://www.iana.org/time-zones/repository/tzdata-latest.tar.gz ftp://ftp.iana.org/tz/tzcode-latest.tar.gz ftp://ftp.iana.org/tz/tzdata-latest.tar.gz Each release file has a GPG signature, which can be retrieved by appending ".asc" to the above URLs. Copies of these signatures are appended to this message. This release corresponds to commit 6ea8fa787948062de40354dd81092f85c8e3fd84 dated Tue Oct 21 22:04:57 2014 -0700 and tagged '2014i' in the experimental github repository at <https://github.com/eggert/tz>. 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