- tz - lists.iana.org

[PATCH] * tz-link.htm: Update for moved and expired URLs.
by Paul Eggert Oct. 20, 2017

Oct. 20, 2017

--- tz-link.htm | 29 +++++++++-------------------- 1 file changed, 9 insertions(+), 20 deletions(-) diff --git a/tz-link.htm b/tz-link.htm index 03259d2..e7a7c8f 100644 --- a/tz-link.htm +++ b/tz-link.htm @@ -267,9 +267,10 @@ href="https://tools.ietf.org/html/rfc7808">TZDIST</a> (Internet <abbr>RFC</abbr> 7808), a time zone data distribution service, along with <a href="https://tools.ietf.org/html/rfc7809">CalDAV</a> (Internet <abbr>RFC</abbr> 7809), a calendar access protocol for -transferring time zone data by reference. The draft <a id="TZDIST-Geolocate" +transferring time zone data by reference. The (expired) draft <a +id="TZDIST-Geolocate" href="https://tools.ietf.org/html/draft-murchison-tzdist-geolocate-00">TZDIST -Geolocate Extension</a> lets a client determine its time zone region +Geolocate Extension</a> would have let a client determine its time zone region from its geographic location using a <a href="https://tools.ietf.org/html/rfc5870">'geo' URI</a>.</li> <li>The <a href="https://tools.ietf.org/html/rfc5545"> @@ -504,9 +505,6 @@ href="https://www.oracle.com/java/index.html">Oracle Java</a> contains a copy of a subset of a recent <code><abbr>tz</abbr></code> database in a Java-specific format.</li> -<li><a href="https://kimmo.suominen.com/sw/timezone/">Time Zone</a> is -a <a href="https://wordpress.org">WordPress</a> plugin. It is freely -available under a <abbr>BSD</abbr>-style license.</li> <li><a href="http://www.relativedata.com/time-zone-master">Time Zone Master</a> is a Microsoft Windows clock program that can automatically download, compile and use <code>tz</code> releases. The Basic version @@ -589,7 +587,8 @@ maps</a> contains <a href="https://en.wikipedia.org/wiki/Shapefile">shapefiles</a> of sets of <code><abbr>tz</abbr></code> regions. This includes <a href="http://efele.net/maps/tz/world/">tz_world</a>, a shapefile -for all the world's regions</li> +for all the world's regions. These maps are no longer maintained and +are superseded by the Timezone Boundary Builder.</li> <li><a href="https://github.com/straup/whereonearth-timezone">Whereonearth-timezone</a> is in <a href="https://tools.ietf.org/html/rfc7946">GeoJSON</a> format @@ -633,10 +632,7 @@ the <a href="https://timezonedb.com">Time Zone Database & API</a>. Commercial network API access is provided by <a href="https://askgeo.com">AskGeo</a> and <a href="https://www.geogarage.com/blog/news-1/post/geogarage-time-zone-api-31">GeoGarage</a>. -Also, an <a -href="https://mm.icann.org/pipermail/tz/2016-October/024309.html">experimental -server</a> is available for the TZDIST Geolocate Extension mentioned -<a href="#TZDIST-Geolocate">above</a>.</li> +</li> <li>"<a href="https://stackoverflow.com/questions/16086962/how-to-get-a-time-zone-from-a-…">How to get a time zone from a location using latitude and longitude @@ -648,13 +644,10 @@ political subdivision data related to time zones.</li> zone boundaries for multizone countries</a> summarizes legal boundaries between time zones within countries.</li> <li>Manifold.net's <a -href="http://manifold.net/info/freestuff.shtml">Free Stuff for +href="http://manifold.net/info/freestuff.shtml">Free Downloads for Manifold System Users</a> includes a Manifold-format map of world time zone boundaries distributed under the <abbr>GPL</abbr>.</li> -<li>The GeoCommunity lists several commercial sources for <a -href="http://spatialnews.geocomm.com/features/timezones/">International -Time Zones and Time Zone Data</a>.</li> <li>A ship within the <a href="https://en.wikipedia.org/wiki/Territorial_waters">territorial waters</a> of any nation uses that nation's time. In international @@ -723,7 +716,7 @@ href="ftp://ftp.cs.huji.ac.il/pub/tz/announcements" hreflang="he">announcements (in Hebrew)</a>.</dd> <dt>Italy</dt> <dd>The National Institute of Metrological Research maintains a -<a href="http://www.inrim.it/res/tf/ora_legale_i.shtml">table of civil time +<a href="http://www.nanospin.eu/res/tf/ora_legale_i.shtml">table of civil time (in Italian)</a>.</dd> <dt>Mexico</dt> <dd>The Investigation and Analysis Service of the Mexican Library of @@ -763,7 +756,7 @@ Time Zone Proceedings</a> lists changes to time zone boundaries.</dd> <h2 id="precision">Precision timekeeping</h2> <ul> <li><a -href="http://literature.agilent.com/litweb/pdf/5965-7984E.pdf">The +href="http://leapsecond.com/hpan/an1289.pdf">The Science of Timekeeping</a> is a thorough introduction to the theory and practice of precision timekeeping.</li> <li><a href="http://www.ntp.org"><abbr @@ -882,10 +875,6 @@ protocols.</li> <a href="https://www.hackcraft.net/web/datetime/">Date & Time Formats on the Web</a> surveys web- and Internet-oriented date and time formats.</li> -<li> -<a href="http://exit109.com/~ghealton/y2k/yrexamples.html">The -Best of Dates, the Worst of Dates</a> covers many problems encountered -by software developers when handling dates and time stamps.</li> <li>Alphabetic time zone abbreviations should not be used as unique identifiers for <abbr>UTC</abbr> offsets as they are ambiguous in practice. For example, in English-speaking North America -- 2.7.4

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Tonga
by Lord Buddha Oct. 18, 2017

Oct. 18, 2017

To DST or not to DST. Currently the TZ DB has Tonga moving to DST on the 5th November. In 2016 they announced they were resuming DST, in the only reference to that I could quickly find <http://matangitonga.to/tag/daylight-saving?page=1>, does not state that this was for one year or whether the resumption was also for successive years. No reference for the change was added to the TZ DB. IATA it seems have taken it as being for a single year and so do not have DST starting this year. Given the discrepancy between IANA and IATA (besides the letter T), does any body have any authoritative/corroborating source for either position. /David

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[PROPOSED] Northern Cyprus to reintroduce winter time
by Paul Eggert Oct. 18, 2017

Oct. 18, 2017

* NEWS, asia (Asia/Famagusta): Switch back to +02/+03 with EU rules. --- NEWS | 7 ++++++- asia | 9 ++++++++- 2 files changed, 14 insertions(+), 2 deletions(-) diff --git a/NEWS b/NEWS index d570ec7..4e98ef7 100644 --- a/NEWS +++ b/NEWS @@ -2,7 +2,9 @@ News for the tz database Unreleased, experimental changes - Briefly: Fiji ends DST 2018-01-14, not 2018-01-21. + Briefly: + Northern Cyprus switches from +03 to +02/+03 on 2017-10-29. + Fiji ends DST 2018-01-14, not 2018-01-21. Namibia switches from +01/+02 to +02 on 2018-04-01. Sudan switches from +03 to +02 on 2017-11-01. Turks & Caicos switches from -04 to -05/-04 on 2018-11-04. @@ -11,6 +13,9 @@ Unreleased, experimental changes Changes to future time stamps + Northern Cyprus has decided to resume EU rules starting + 2017-10-29, thus reinstituting winter time. + Fiji ends DST 2018-01-14 instead of the 2018-01-21 previously predicted. (Thanks to Dominic Fok.) Adjust future predictions accordingly. diff --git a/asia b/asia index 5ce916d..ac39af3 100644 --- a/asia +++ b/asia @@ -785,6 +785,12 @@ Zone Asia/Macau 7:34:20 - LMT 1912 Jan 1 # Looks like the time zone split in Cyprus went through last night. # http://cyprus-mail.com/2016/10/30/cyprus-new-division-two-time-zones-now-re… +# From Paul Eggert (2017-10-18): +# Northern Cyprus will reinstate winter time on October 29, thus +# staying in sync with the rest of Cyprus. See: Anastasiou A. +# Cyprus to remain united in time. Cyprus Mail 2017-10-17. +# https://cyprus-mail.com/2017/10/17/cyprus-remain-united-time/ + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Cyprus 1975 only - Apr 13 0:00 1:00 S Rule Cyprus 1975 only - Oct 12 0:00 0 - @@ -802,7 +808,8 @@ Zone Asia/Nicosia 2:13:28 - LMT 1921 Nov 14 Zone Asia/Famagusta 2:15:48 - LMT 1921 Nov 14 2:00 Cyprus EE%sT 1998 Sep 2:00 EUAsia EE%sT 2016 Sep 8 - 3:00 - +03 + 3:00 - +03 2017 Oct 29 1:00u + 2:00 EUAsia EE%sT # Classically, Cyprus belongs to Asia; e.g. see Herodotus, Histories, I.72. # However, for various reasons many users expect to find it under Europe. -- 2.7.4

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Palestine summer time end 2017
by Sharef Mustafa Oct. 18, 2017

Oct. 18, 2017

Hi, According to Palestinian cabinet decision on Tue Oct 17th 2017, the summer time will end on Sat Oct 28th 2017 , the clock will be returned 60 minutes at 01:00 AM here is the link to the press release of the Palestinian cabinet http://www.palestinecabinet.gov.ps/Website/ar/ViewDetails?ID=41158 below links to few news portal who published the news. (in Arabic) http://www.maannews.net/Content.aspx?id=926062 http://aqsatv.ps/post/14832/%D8%A7%D9%84%D8%AA%D9%88%D9%82%D9%8A%D8%AA-%D8%… http://www.pbc.ps/News/%D9%85%D8%AC%D9%84%D8%B3-%D8%A7%D9%84%D9%88%D8%B2%D8… <http://www.pbc.ps/News/%D9%85%D8%AC%D9%84%D8%B3-%D8%A7%D9%84%D9%88%D8%B2%D8…> BR

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[PROPOSED] Assume South Sudan is not changing
by Paul Eggert Oct. 18, 2017

Oct. 18, 2017

Although we have not heard from the government of South Sudan, for now, guess they will not change to stay in sync with Sudan. * NEWS: Mention this. * africa (Africa/Juba): Now a Zone, with the previous contents of Africa/Khartoum except for the initial LMT. * zone1970.tab (Africa/Juba): New entry. --- NEWS | 3 ++- africa | 5 ++++- zone1970.tab | 3 ++- 3 files changed, 8 insertions(+), 3 deletions(-) diff --git a/NEWS b/NEWS index b0afb21..04d6f39 100644 --- a/NEWS +++ b/NEWS @@ -20,7 +20,8 @@ Unreleased, experimental changes at 02:00. (Thanks to Steffen Thorsen.) Sudan will switch from +03 to +02 on 2017-11-01. - (Thanks to Ahmed Atyya.) + (Thanks to Ahmed Atyya.) South Sudan is not switching, so + Africa/Juba is no longer a link to Africa/Khartoum. Turks & Caicos will switch from -04 all year to -05 with US DST on 2018-03-11 at 03:00. This affects UT offsets starting 2018-11-04 diff --git a/africa b/africa index 04ca8db..4a1915c 100644 --- a/africa +++ b/africa @@ -1097,7 +1097,10 @@ Zone Africa/Khartoum 2:10:08 - LMT 1931 2:00 - CAT # South Sudan -Link Africa/Khartoum Africa/Juba +# Zone NAME GMTOFF RULES FORMAT [UNTIL] +Zone Africa/Juba 2:06:28 - LMT 1931 + 2:00 Sudan CA%sT 2000 Jan 15 12:00 + 3:00 - EAT # Swaziland # See Africa/Johannesburg. diff --git a/zone1970.tab b/zone1970.tab index 8b828e6..455e797 100644 --- a/zone1970.tab +++ b/zone1970.tab @@ -316,10 +316,11 @@ RU +6445+17729 Asia/Anadyr MSK+09 - Bering Sea SA,KW,YE +2438+04643 Asia/Riyadh SB -0932+16012 Pacific/Guadalcanal SC -0440+05528 Indian/Mahe -SD,SS +1536+03232 Africa/Khartoum +SD +1536+03232 Africa/Khartoum SE +5920+01803 Europe/Stockholm SG +0117+10351 Asia/Singapore SR +0550-05510 America/Paramaribo +SS +0451+03137 Africa/Juba SV +1342-08912 America/El_Salvador SY +3330+03618 Asia/Damascus TC +2128-07108 America/Grand_Turk -- 2.13.6

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[PROPOSED 1/2] * northamerica: Cite McLeod on legal time in Labrador.
by Paul Eggert Oct. 14, 2017

Oct. 14, 2017

--- northamerica | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/northamerica b/northamerica index ec5772d..e5d3eca 100644 --- a/northamerica +++ b/northamerica @@ -1254,11 +1254,13 @@ Rule Canada 2007 max - Nov Sun>=1 2:00 0 S # Newfoundland and Labrador -# From Paul Eggert (2000-10-02): -# Matthews and Vincent (1998) write that Labrador should use NST/NDT, -# but the only part of Labrador that follows the rules is the -# southeast corner, including Port Hope Simpson and Mary's Harbour, -# but excluding, say, Black Tickle. +# From Paul Eggert (2017-10-14): +# Legally Labrador should observe Newfoundland time; see: +# McLeod J. Labrador time - legal or not? St. John's Telegram, 2017-10-07 +# http://www.thetelegram.com/news/local/labrador-time--legal-or-not-154860/ +# Matthews and Vincent (1998) write that the only part of Labrador +# that follows the rules is the southeast corner, including Port Hope +# Simpson and Mary's Harbour, but excluding, say, Black Tickle. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule StJohns 1917 only - Apr 8 2:00 1:00 D -- 2.7.4

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Soma SAVE format
by J William Piggott Oct. 3, 2017

Oct. 3, 2017

Is there a reason that Somoa SAVE time format is: SAVE 1 0 1 0 1 When others are formated like: SAVE 1:00 0 1:00 0 1:00

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[PATCH 1/3] * Theory: fix typo in previous change
by Paul Eggert Oct. 2, 2017

Oct. 2, 2017

--- Theory | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Theory b/Theory index 3e88173..328423a 100644 --- a/Theory +++ b/Theory @@ -10,7 +10,7 @@ Theory and pragmatics of the tz code and data Time and date functions Interface stability Calendrical issues - Time and time zones on Mars + Time and time zones on other planets ----- Scope of the tz database ----- -- 2.7.4

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[PATCH] Mention time on Mercury, Venus, etc.
by Paul Eggert Oct. 1, 2017

Oct. 1, 2017

* Theory: Mention time on planets in our solar system other than Earth and Mars, and cite Williams 2017. --- Theory | 21 +++++++++++++++++++-- 1 file changed, 19 insertions(+), 2 deletions(-) diff --git a/Theory b/Theory index b223935..3e88173 100644 --- a/Theory +++ b/Theory @@ -810,7 +810,7 @@ Mittelalters und der Neuzeit_, herausgegeben von Dr. O. Grotefend (Hannover: Hahnsche Buchhandlung, 1941), pp. 26-28. ------ Time and time zones on Mars ----- +----- Time and time zones on other planets ----- Some people's work schedules use Mars time. Jet Propulsion Laboratory (JPL) coordinators have kept Mars time on and off at least since 1997 @@ -844,7 +844,20 @@ wide acceptance. Astronomers often use Mars Sol Date (MSD) which is a sequential count of Mars solar days elapsed since about 1873-12-29 12:00 GMT. -The tz database does not currently support Mars time, but it is +In our solar system, Mars is the planet with time and calendar most +like Earth's. On other planets, Sun-based time and calendars would +work quite differently. For example, although Mercury's sidereal +rotation period is 58.646 Earth days, Mercury revolves around the Sun +so rapidly that an observer on Mercury's equator would see a sunrise +only every 175.97 Earth days, i.e., a Mercury year is 0.5 of a Mercury +day. Venus is more complicated, partly because its rotation is +slightly retrograde: its year is 1.92 of its days. Gas giants like +Jupiter are trickier still, as their polar and equatorial regions +rotate at different rates, so that the length of a day depends on +latitude. This effect is most pronounced on Neptune, where the day is +about 12 hours at the poles and 18 hours at the equator. + +Although the tz database does not support time on other planets, it is documented here in the hopes that support will be added eventually. Sources: @@ -860,6 +873,10 @@ Jia-Rui Chong, "Workdays Fit for a Martian", Los Angeles Times Tom Chmielewski, "Jet Lag Is Worse on Mars", The Atlantic (2015-02-26) <https://www.theatlantic.com/technology/archive/2015/02/jet-lag-is-worse-on-…> +Matt Williams, "How long is a day on the other planets of the solar +system?" <https://www.universetoday.com/37481/days-of-the-planets/> +(2017-04-27). + ----- This file is in the public domain, so clarified as of 2009-05-17 by -- 2.7.4

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Turkey law about DST has been annulled
by Dempsey, Peter Sept. 28, 2017

Sept. 28, 2017

Hi, Just to inform you about the breaking news in Turkey with regards to DST: http://www.sozcu.com.tr/2017/ekonomi/son-dakika-haberi-yaz-saati-uygulamasi… The Council of State have annulled the law that resulted in Turkey in no longer using DST. It is still not certain what the next actions that the Government will take but I will keep you informed accordingly. Best regards, Pete Pete Dempsey Application Engineer | Verint Customer Engagement Solutions email peter.dempsey(a)verint.com<mailto:peter.dempsey@verint.com> office +90-216-687-0822 mobile +90-532-581-5995 This electronic message may contain proprietary and confidential information of Verint Systems Inc., its affiliates and/or subsidiaries. The information is intended to be for the use of the individual(s) or entity(ies) named above. If you are not the intended recipient (or authorized to receive this e-mail for the intended recipient), you may not use, copy, disclose or distribute to anyone this message or any information contained in this message. If you have received this electronic message in error, please notify us by replying to this e-mail.

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