Date: Tue, 5 Nov 2013 06:42:02 +0000 (UTC) From: Edwin Groothuis <edwin@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-6@freebsd.org Subject: svn commit: r257685 - stable/6/share/zoneinfo Message-ID: <201311050642.rA56g2dh038822@svn.freebsd.org>
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Author: edwin Date: Tue Nov 5 06:42:01 2013 New Revision: 257685 URL: http://svnweb.freebsd.org/changeset/base/257685 Log: MFC of 257681 tzdata2013f - Jordan goes to winter time on the last Friday in October. - Tocantins in Brazil will not go into summer time in October. - Indonesian time zones renames. - Lots of cleanups in with regarding to links and historical data. tzdata2013h - Libya didn't go back to DST. - Fix Morocco 2038 issue. - Brazil/Acre and ?Western Amazonas are chaning timezones. Added: stable/6/share/zoneinfo/leap-seconds.list - copied unchanged from r257681, head/contrib/tzdata/leap-seconds.list Modified: stable/6/share/zoneinfo/africa stable/6/share/zoneinfo/antarctica stable/6/share/zoneinfo/asia stable/6/share/zoneinfo/australasia stable/6/share/zoneinfo/backward stable/6/share/zoneinfo/etcetera stable/6/share/zoneinfo/europe stable/6/share/zoneinfo/northamerica stable/6/share/zoneinfo/southamerica stable/6/share/zoneinfo/zone.tab Directory Properties: stable/6/share/zoneinfo/ (props changed) Modified: stable/6/share/zoneinfo/africa ============================================================================== --- stable/6/share/zoneinfo/africa Tue Nov 5 06:40:35 2013 (r257684) +++ stable/6/share/zoneinfo/africa Tue Nov 5 06:42:01 2013 (r257685) @@ -451,6 +451,14 @@ Zone Africa/Monrovia -0:43:08 - LMT 1882 # (either two days before them or five days after them, so as to fall on # lastFri instead of lastSun). +# From Even Scharning (2013-10-25): +# The scheduled end of DST in Libya on Friday, October 25, 2013 was +# cancelled yesterday.... +# http://www.libyaherald.com/2013/10/24/correction-no-time-change-tomorrow/ +# +# From Paul Eggert (2013-10-25): +# For now, assume they're reverting to the pre-2012 rules of permanent UTC+2. + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Libya 1951 only - Oct 14 2:00 1:00 S Rule Libya 1952 only - Jan 1 0:00 0 - @@ -467,8 +475,8 @@ Rule Libya 1987 1989 - Apr 1 0:00 1:00 Rule Libya 1987 1989 - Oct 1 0:00 0 - Rule Libya 1997 only - Apr 4 0:00 1:00 S Rule Libya 1997 only - Oct 4 0:00 0 - -Rule Libya 2013 max - Mar lastFri 1:00 1:00 S -Rule Libya 2013 max - Oct lastFri 2:00 0 - +Rule Libya 2013 only - Mar lastFri 1:00 1:00 S +Rule Libya 2013 only - Oct lastFri 2:00 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Africa/Tripoli 0:52:44 - LMT 1920 1:00 Libya CE%sT 1959 @@ -479,7 +487,8 @@ Zone Africa/Tripoli 0:52:44 - LMT 1920 2:00 - EET 1996 Sep 30 1:00 Libya CE%sT 1997 Oct 4 2:00 - EET 2012 Nov 10 2:00 - 1:00 Libya CE%sT + 1:00 Libya CE%sT 2013 Oct 25 2:00 + 2:00 - EET # Madagascar # Zone NAME GMTOFF RULES FORMAT [UNTIL] @@ -684,15 +693,6 @@ Zone Indian/Mayotte 3:00:56 - LMT 1911 J # http://www.google.com/search?hl=en&q=Conseil+de+gouvernement+maroc+heure+avance&btnG=Search # </a> -# From Alex Krivenyshev (2008-05-09): -# Is Western Sahara (part which administrated by Morocco) going to follow -# Morocco DST changes? Any information? What about other part of -# Western Sahara - under administration of POLISARIO Front (also named -# SADR Saharawi Arab Democratic Republic)? - -# From Arthur David Olson (2008-05-09): -# XXX--guess that it is only Morocco for now; guess only 2008 for now. - # From Steffen Thorsen (2008-08-27): # Morocco will change the clocks back on the midnight between August 31 # and September 1. They originally planned to observe DST to near the end @@ -858,13 +858,23 @@ Zone Indian/Mayotte 3:00:56 - LMT 1911 J # transitions would be 2013-07-07 and 2013-08-10; see: # http://www.maroc.ma/en/news/morocco-suspends-daylight-saving-time-july-7-aug10 -# From Paul Eggert (2013-07-03): +# From Steffen Thorsen (2013-09-28): +# Morocco extends DST by one month, on very short notice, just 1 day +# before it was going to end. There is a new decree (2.13.781) for +# this, where DST from now on goes from last Sunday of March at 02:00 +# to last Sunday of October at 03:00, similar to EU rules. Official +# source (French): +# http://www.maroc.gov.ma/fr/actualites/lhoraire-dete-gmt1-maintenu-jusquau-27-octobre-2013 +# Another source (specifying the time for start and end in the decree): +# http://www.lemag.ma/Heure-d-ete-au-Maroc-jusqu-au-27-octobre_a75620.html + +# From Paul Eggert (2013-10-03): # To estimate what the Moroccan government will do in future years, -# transition dates for 2014 through 2021 were determined by running +# transition dates for 2014 through 2038 were determined by running # the following program under GNU Emacs 24.3: # # (let ((islamic-year 1435)) -# (while (< islamic-year 1444) +# (while (< islamic-year 1461) # (let ((a # (calendar-gregorian-from-absolute # (calendar-islamic-to-absolute (list 9 1 islamic-year)))) @@ -879,13 +889,18 @@ Zone Indian/Mayotte 3:00:56 - LMT 1911 J # (car (cdr (cdr b))) (calendar-month-name (car b) t) (car (cdr b))))) # (setq islamic-year (+ 1 islamic-year)))) # -# with the results hand-edited for 2020-2022, when the normal spring-forward -# date falls during the estimated Ramadan. -# -# From 2023 through 2038 Ramadan is not predicted to overlap with -# daylight saving time. Starting in 2039 there will be overlap again, -# but 32-bit time_t values roll around in 2038 so for now do not worry -# about dates after 2038. +# with spring-forward transitions removed for 2023-2025, when the +# normal spring-forward date falls during the estimated Ramadan; with +# all transitions removed for 2026-2035, where the estimated Ramadan +# falls entirely outside daylight-saving time; and with fall-back +# transitions removed for 2036-2037, where the normal fall-back +# date falls during the estimated Ramadan. Normally, the table would +# stop after 2037 because 32-bit time_t values roll around early in 2038, +# but that would imply a prediction of perpetual DST after March 2038 +# due to the year-2037 glitches. So, this table instead stops after +# 2038, the first non-glitchy year after the 32-bit rollover. +# An advantage of stopping after 2038 is that it lets zic guess +# TZ='WET0WEST,M3.5.0,M10.5.0/3' for time stamps far in the future. # RULE NAME FROM TO TYPE IN ON AT SAVE LETTER/S @@ -912,12 +927,14 @@ Rule Morocco 2010 only - May 2 0:00 1: Rule Morocco 2010 only - Aug 8 0:00 0 - Rule Morocco 2011 only - Apr 3 0:00 1:00 S Rule Morocco 2011 only - Jul 31 0 0 - -Rule Morocco 2012 2019 - Apr lastSun 2:00 1:00 S -Rule Morocco 2012 max - Sep lastSun 3:00 0 - +Rule Morocco 2012 2013 - Apr lastSun 2:00 1:00 S +Rule Morocco 2012 only - Sep 30 3:00 0 - Rule Morocco 2012 only - Jul 20 3:00 0 - Rule Morocco 2012 only - Aug 20 2:00 1:00 S Rule Morocco 2013 only - Jul 7 3:00 0 - Rule Morocco 2013 only - Aug 10 2:00 1:00 S +Rule Morocco 2013 2035 - Oct lastSun 3:00 0 - +Rule Morocco 2014 2022 - Mar lastSun 2:00 1:00 S Rule Morocco 2014 only - Jun 29 3:00 0 - Rule Morocco 2014 only - Jul 29 2:00 1:00 S Rule Morocco 2015 only - Jun 18 3:00 0 - @@ -930,20 +947,42 @@ Rule Morocco 2018 only - May 16 3:00 0 Rule Morocco 2018 only - Jun 15 2:00 1:00 S Rule Morocco 2019 only - May 6 3:00 0 - Rule Morocco 2019 only - Jun 5 2:00 1:00 S +Rule Morocco 2020 only - Apr 24 3:00 0 - Rule Morocco 2020 only - May 24 2:00 1:00 S +Rule Morocco 2021 only - Apr 13 3:00 0 - Rule Morocco 2021 only - May 13 2:00 1:00 S +Rule Morocco 2022 only - Apr 3 3:00 0 - Rule Morocco 2022 only - May 3 2:00 1:00 S -Rule Morocco 2023 max - Apr lastSun 2:00 1:00 S +Rule Morocco 2023 only - Apr 22 2:00 1:00 S +Rule Morocco 2024 only - Apr 10 2:00 1:00 S +Rule Morocco 2025 only - Mar 31 2:00 1:00 S +Rule Morocco 2026 max - Mar lastSun 2:00 1:00 S +Rule Morocco 2036 only - Oct 21 3:00 0 - +Rule Morocco 2037 only - Oct 11 3:00 0 - +Rule Morocco 2038 only - Sep 30 3:00 0 - +Rule Morocco 2038 only - Oct 30 2:00 1:00 S +Rule Morocco 2038 max - Oct lastSun 3:00 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Africa/Casablanca -0:30:20 - LMT 1913 Oct 26 0:00 Morocco WE%sT 1984 Mar 16 1:00 - CET 1986 0:00 Morocco WE%sT + # Western Sahara +# +# From Gwillim Law (2013-10-22): +# A correspondent who is usually well informed about time zone matters +# ... says that Western Sahara observes daylight saving time, just as +# Morocco does. +# +# From Paul Eggert (2013-10-23): +# Assume that this has been true since Western Sahara switched to GMT, +# since most of it was then controlled by Morocco. + Zone Africa/El_Aaiun -0:52:48 - LMT 1934 Jan -1:00 - WAT 1976 Apr 14 - 0:00 - WET + 0:00 Morocco WE%sT # Mozambique # Zone NAME GMTOFF RULES FORMAT [UNTIL] @@ -1100,9 +1139,7 @@ Zone Africa/Khartoum 2:10:08 - LMT 1931 3:00 - EAT # South Sudan -Zone Africa/Juba 2:06:24 - LMT 1931 - 2:00 Sudan CA%sT 2000 Jan 15 12:00 - 3:00 - EAT +Link Africa/Khartoum Africa/Juba # Swaziland # Zone NAME GMTOFF RULES FORMAT [UNTIL] Modified: stable/6/share/zoneinfo/antarctica ============================================================================== --- stable/6/share/zoneinfo/antarctica Tue Nov 5 06:40:35 2013 (r257684) +++ stable/6/share/zoneinfo/antarctica Tue Nov 5 06:42:01 2013 (r257685) @@ -16,9 +16,9 @@ # # Except for the French entries, # I made up all time zone abbreviations mentioned here; corrections welcome! -# FORMAT is `zzz' and GMTOFF is 0 for locations while uninhabited. +# FORMAT is 'zzz' and GMTOFF is 0 for locations while uninhabited. -# These rules are stolen from the `southamerica' file. +# These rules are stolen from the 'southamerica' file. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule ArgAQ 1964 1966 - Mar 1 0:00 0 - Rule ArgAQ 1964 1966 - Oct 15 0:00 1:00 S @@ -228,9 +228,10 @@ Zone Antarctica/Syowa 0 - zzz 1957 Jan 2 # Scott Island (never inhabited) # # year-round base -# Scott, Ross Island, since 1957-01, is like Antarctica/McMurdo. +# Scott Base, Ross Island, since 1957-01. +# See Pacific/Auckland. # -# These rules for New Zealand are stolen from the `australasia' file. +# These rules for New Zealand are stolen from the 'australasia' file. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule NZAQ 1974 only - Nov 3 2:00s 1:00 D Rule NZAQ 1975 1988 - Oct lastSun 2:00s 1:00 D @@ -268,11 +269,11 @@ Rule NZAQ 2008 max - Apr Sun>=1 2:00s 0 # From Lee Hotz (2001-03-08): # I queried the folks at Columbia who spent the summer at Vostok and this is # what they had to say about time there: -# ``in the US Camp (East Camp) we have been on New Zealand (McMurdo) +# "in the US Camp (East Camp) we have been on New Zealand (McMurdo) # time, which is 12 hours ahead of GMT. The Russian Station Vostok was # 6 hours behind that (although only 2 miles away, i.e. 6 hours ahead # of GMT). This is a time zone I think two hours east of Moscow. The -# natural time zone is in between the two: 8 hours ahead of GMT.'' +# natural time zone is in between the two: 8 hours ahead of GMT." # # From Paul Eggert (2001-05-04): # This seems to be hopelessly confusing, so I asked Lee Hotz about it @@ -337,16 +338,8 @@ Zone Antarctica/Palmer 0 - zzz 1965 -4:00 ChileAQ CL%sT # # -# McMurdo, Ross Island, since 1955-12 -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Antarctica/McMurdo 0 - zzz 1956 - 12:00 NZAQ NZ%sT -# -# Amundsen-Scott, South Pole, continuously occupied since 1956-11-20 -# -# From Paul Eggert (1996-09-03): -# Normally it wouldn't have a separate entry, since it's like the -# larger Antarctica/McMurdo since 1970, but it's too famous to omit. +# McMurdo Station, Ross Island, since 1955-12 +# Amundsen-Scott South Pole Station, continuously occupied since 1956-11-20 # # From Chris Carrier (1996-06-27): # Siple, the first commander of the South Pole station, @@ -368,4 +361,4 @@ Zone Antarctica/McMurdo 0 - zzz 1956 # we have to go around and set them back 5 minutes or so. # Maybe if we let them run fast all of the time, we'd get to leave here sooner!! # -Link Antarctica/McMurdo Antarctica/South_Pole +# See 'australasia' for Antarctica/McMurdo. Modified: stable/6/share/zoneinfo/asia ============================================================================== --- stable/6/share/zoneinfo/asia Tue Nov 5 06:40:35 2013 (r257684) +++ stable/6/share/zoneinfo/asia Tue Nov 5 06:42:01 2013 (r257685) @@ -6,7 +6,7 @@ # go ahead and edit the file (and please send any changes to # tz@iana.org for general use in the future). -# From Paul Eggert (2013-02-21): +# From Paul Eggert (2013-08-11): # # A good source for time zone historical data outside the U.S. is # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), @@ -44,11 +44,11 @@ # 4:00 GST Gulf* # 5:30 IST India # 7:00 ICT Indochina* -# 7:00 WIT west Indonesia -# 8:00 CIT central Indonesia +# 7:00 WIB west Indonesia (Waktu Indonesia Barat) +# 8:00 WITA central Indonesia (Waktu Indonesia Tengah) # 8:00 CST China # 9:00 CJT Central Japanese Time (1896/1937)* -# 9:00 EIT east Indonesia +# 9:00 WIT east Indonesia (Waktu Indonesia Timur) # 9:00 JST JDT Japan # 9:00 KST KDT Korea # 9:30 CST (Australian) Central Standard Time @@ -756,7 +756,7 @@ Zone Asia/Dili 8:22:20 - LMT 1912 8:00 - TLT 1942 Feb 21 23:00 # E Timor Time 9:00 - JST 1945 Sep 23 9:00 - TLT 1976 May 3 - 8:00 - CIT 2000 Sep 17 00:00 + 8:00 - WITA 2000 Sep 17 00:00 9:00 - TLT # India @@ -793,36 +793,53 @@ Zone Asia/Kolkata 5:53:28 - LMT 1880 # K # (Hollandia). For now, assume all Indonesian locations other than Jayapura # switched on 1945-09-23. # +# From Paul Eggert (2013-08-11): +# Normally the tz database uses English-language abbreviations, but in +# Indonesia it's typical to use Indonesian-language abbreviations even +# when writing in English. For example, see the English-language +# summary published by the Time and Frequency Laboratory of the +# Research Center for Calibration, Instrumentation and Metrology, +# Indonesia, <http://time.kim.lipi.go.id/time-eng.php>; (2006-09-29). +# The abbreviations are: +# +# WIB - UTC+7 - Waktu Indonesia Barat (Indonesia western time) +# WITA - UTC+8 - Waktu Indonesia Tengah (Indonesia central time) +# WIT - UTC+9 - Waktu Indonesia Timur (Indonesia eastern time) +# # Zone NAME GMTOFF RULES FORMAT [UNTIL] +# Java, Sumatra Zone Asia/Jakarta 7:07:12 - LMT 1867 Aug 10 # Shanks & Pottenger say the next transition was at 1924 Jan 1 0:13, # but this must be a typo. - 7:07:12 - JMT 1923 Dec 31 23:47:12 # Jakarta + 7:07:12 - BMT 1923 Dec 31 23:47:12 # Batavia 7:20 - JAVT 1932 Nov # Java Time - 7:30 - WIT 1942 Mar 23 + 7:30 - WIB 1942 Mar 23 9:00 - JST 1945 Sep 23 - 7:30 - WIT 1948 May - 8:00 - WIT 1950 May - 7:30 - WIT 1964 - 7:00 - WIT + 7:30 - WIB 1948 May + 8:00 - WIB 1950 May + 7:30 - WIB 1964 + 7:00 - WIB +# west and central Borneo Zone Asia/Pontianak 7:17:20 - LMT 1908 May 7:17:20 - PMT 1932 Nov # Pontianak MT - 7:30 - WIT 1942 Jan 29 + 7:30 - WIB 1942 Jan 29 9:00 - JST 1945 Sep 23 - 7:30 - WIT 1948 May - 8:00 - WIT 1950 May - 7:30 - WIT 1964 - 8:00 - CIT 1988 Jan 1 - 7:00 - WIT + 7:30 - WIB 1948 May + 8:00 - WIB 1950 May + 7:30 - WIB 1964 + 8:00 - WITA 1988 Jan 1 + 7:00 - WIB +# Sulawesi, Lesser Sundas, east and south Borneo Zone Asia/Makassar 7:57:36 - LMT 1920 7:57:36 - MMT 1932 Nov # Macassar MT - 8:00 - CIT 1942 Feb 9 + 8:00 - WITA 1942 Feb 9 9:00 - JST 1945 Sep 23 - 8:00 - CIT + 8:00 - WITA +# Maluku Islands, West Papua, Papua Zone Asia/Jayapura 9:22:48 - LMT 1932 Nov - 9:00 - EIT 1944 Sep 1 + 9:00 - WIT 1944 Sep 1 9:30 - CST 1964 - 9:00 - EIT + 9:00 - WIT # Iran @@ -1364,9 +1381,11 @@ Zone Asia/Tokyo 9:18:59 - LMT 1887 Dec 3 # until about the same time next year (at least). # http://www.petra.gov.jo/Public_News/Nws_NewsDetails.aspx?NewsID=88950 # -# From Paul Eggert (2012-10-25): -# For now, assume this is just a one-year measure. If it becomes -# permanent, we should move Jordan from EET to AST effective tomorrow. +# From Paul Eggert (2013-09-21): +# It's looking like this change will be permanent; see +# Petra News Agency, Cancelling winter saved Jordan $7 million (2013-02-20) +# <http://www.albawaba.com/business/jordan-winter-electricity--472005>. +# So move Jordan to UTC+3 as of the abovementioned date. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Jordan 1973 only - Jun 6 0:00 1:00 S @@ -1392,15 +1411,15 @@ Rule Jordan 1995 1998 - Sep Fri>=15 0:00 Rule Jordan 1999 only - Jul 1 0:00s 1:00 S Rule Jordan 1999 2002 - Sep lastFri 0:00s 0 - Rule Jordan 2000 2001 - Mar lastThu 0:00s 1:00 S -Rule Jordan 2002 max - Mar lastThu 24:00 1:00 S +Rule Jordan 2002 2012 - Mar lastThu 24:00 1:00 S Rule Jordan 2003 only - Oct 24 0:00s 0 - Rule Jordan 2004 only - Oct 15 0:00s 0 - Rule Jordan 2005 only - Sep lastFri 0:00s 0 - -Rule Jordan 2006 2011 - Oct lastFri 0:00s 0 - -Rule Jordan 2013 max - Oct lastFri 0:00s 0 - +Rule Jordan 2006 2012 - Oct lastFri 0:00s 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Asia/Amman 2:23:44 - LMT 1931 - 2:00 Jordan EE%sT + 2:00 Jordan EE%sT 2012 Oct 26 0:00s + 3:00 - AST # Kazakhstan @@ -2280,9 +2299,18 @@ Zone Asia/Karachi 4:28:12 - LMT 1907 # http://www.samanews.com/index.php?act=Show&id=154120 # http://safa.ps/details/news/99844/%D8%B1%D8%A7%D9%85-%D8%A7%D9%84%D9%84%D9%87-%D8%A8%D8%AF%D8%A1-%D8%A7%D9%84%D8%AA%D9%88%D9%82%D9%8A%D8%AA-%D8%A7%D9%84%D8%B5%D9%8A%D9%81%D9%8A-29-%D8%A7%D9%84%D8%AC%D8%A7%D8%B1%D9%8A.html -# From Paul Eggert (2013-04-15): +# From Steffen Thorsen (2013-09-24): +# The Gaza and West Bank are ending DST Thursday at midnight +# (2013-09-27 00:00:00) (one hour earlier than last year...). +# This source in English, says "that winter time will go into effect +# at midnight on Thursday in the West Bank and Gaza Strip": +# http://english.wafa.ps/index.php?action=detail&id=23246 +# official source...: +# http://www.palestinecabinet.gov.ps/ar/Views/ViewDetails.aspx?pid=1252 + +# From Paul Eggert (2013-09-24): # For future dates, guess the last Thursday in March at 24:00 through -# the first Friday on or after September 21 at 01:00. This is consistent with +# the first Friday on or after September 21 at 00:00. This is consistent with # the predictions in today's editions of the following URLs, # which are for Gaza and Hebron respectively: # http://www.timeanddate.com/worldclock/timezone.html?n=702 @@ -2313,7 +2341,8 @@ Rule Palestine 2011 only - Aug 1 0:00 0 Rule Palestine 2011 only - Aug 30 0:00 1:00 S Rule Palestine 2011 only - Sep 30 0:00 0 - Rule Palestine 2012 max - Mar lastThu 24:00 1:00 S -Rule Palestine 2012 max - Sep Fri>=21 1:00 0 - +Rule Palestine 2012 only - Sep 21 1:00 0 - +Rule Palestine 2013 max - Sep Fri>=21 0:00 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Asia/Gaza 2:17:52 - LMT 1900 Oct Modified: stable/6/share/zoneinfo/australasia ============================================================================== --- stable/6/share/zoneinfo/australasia Tue Nov 5 06:40:35 2013 (r257684) +++ stable/6/share/zoneinfo/australasia Tue Nov 5 06:42:01 2013 (r257685) @@ -352,16 +352,25 @@ Zone Indian/Cocos 6:27:40 - LMT 1900 # today confirmed that Fiji will start daylight savings at 2 am on Sunday 21st # October 2012 and end at 3 am on Sunday 20th January 2013. # http://www.fiji.gov.fj/index.php?option=com_content&view=article&id=6702&catid=71&Itemid=155 -# -# From Paul Eggert (2012-08-31): -# For now, guess a pattern of the penultimate Sundays in October and January. + +# From the Fijian Government Media Center (2013-08-30) via David Wheeler: +# Fiji will start daylight savings on Sunday 27th October, 2013 and end at 3am +# on Sunday 19th January, 2014.... move clocks forward by one hour from 2am +# http://www.fiji.gov.fj/Media-Center/Press-Releases/DAYLIGHT-SAVING-STARTS-ON-SUNDAY,-27th-OCTOBER-201.aspx +# +# From Paul Eggert (2013-09-09): +# For now, guess that Fiji springs forward the Sunday before the fourth +# Monday in October. This matches both recent practice and +# timeanddate.com's current spring-forward prediction. +# For the January 2014 transition we guessed right while timeanddate.com +# guessed wrong, so leave the fall-back prediction alone. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Fiji 1998 1999 - Nov Sun>=1 2:00 1:00 S Rule Fiji 1999 2000 - Feb lastSun 3:00 0 - Rule Fiji 2009 only - Nov 29 2:00 1:00 S Rule Fiji 2010 only - Mar lastSun 3:00 0 - -Rule Fiji 2010 max - Oct Sun>=18 2:00 1:00 S +Rule Fiji 2010 max - Oct Sun>=21 2:00 1:00 S Rule Fiji 2011 only - Mar Sun>=1 3:00 0 - Rule Fiji 2012 max - Jan Sun>=18 3:00 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] @@ -487,6 +496,7 @@ Zone Pacific/Auckland 11:39:04 - LMT 186 Zone Pacific/Chatham 12:13:48 - LMT 1957 Jan 1 12:45 Chatham CHA%sT +Link Pacific/Auckland Antarctica/McMurdo # Auckland Is # uninhabited; Maori and Moriori, colonial settlers, pastoralists, sealers, @@ -736,7 +746,7 @@ Zone Pacific/Funafuti 11:56:52 - LMT 190 # 1886-1891; Baker was similar but exact dates are not known. # Inhabited by civilians 1935-1942; U.S. military bases 1943-1944; # uninhabited thereafter. -# Howland observed Hawaii Standard Time (UTC-10:30) in 1937; +# Howland observed Hawaii Standard Time (UT-10:30) in 1937; # see page 206 of Elgen M. Long and Marie K. Long, # Amelia Earhart: the Mystery Solved, Simon & Schuster (2000). # So most likely Howland and Baker observed Hawaii Time from 1935 @@ -749,8 +759,17 @@ Zone Pacific/Funafuti 11:56:52 - LMT 190 # no information; was probably like Pacific/Kiritimati # Johnston -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Pacific/Johnston -10:00 - HST +# +# From Paul Eggert (2013-09-03): +# In his memoirs of June 6th to October 4, 1945 +# <http://www.315bw.org/Herb_Bach.htm>; (2005), Herbert C. Bach writes, +# "We started our letdown to Kwajalein Atoll and landed there at 5:00 AM +# Johnston time, 1:30 AM Kwajalein time." This was in June 1945, and +# confirms that Johnston kept the same time as Honolulu in summer 1945. +# We have no better information, so for now, assume this has been true +# indefinitely into the past. +# +# See 'northamerica' for Pacific/Johnston. # Kingman # uninhabited Modified: stable/6/share/zoneinfo/backward ============================================================================== --- stable/6/share/zoneinfo/backward Tue Nov 5 06:40:35 2013 (r257684) +++ stable/6/share/zoneinfo/backward Tue Nov 5 06:42:01 2013 (r257685) @@ -22,15 +22,17 @@ Link America/Kentucky/Louisville America Link America/Argentina/Mendoza America/Mendoza Link America/Rio_Branco America/Porto_Acre Link America/Argentina/Cordoba America/Rosario -Link America/St_Thomas America/Virgin +Link America/Denver America/Shiprock +Link America/Port_of_Spain America/Virgin +Link Pacific/Auckland Antarctica/South_Pole Link Asia/Ashgabat Asia/Ashkhabad +Link Asia/Kolkata Asia/Calcutta Link Asia/Chongqing Asia/Chungking Link Asia/Dhaka Asia/Dacca Link Asia/Kathmandu Asia/Katmandu -Link Asia/Kolkata Asia/Calcutta Link Asia/Macau Asia/Macao -Link Asia/Jerusalem Asia/Tel_Aviv Link Asia/Ho_Chi_Minh Asia/Saigon +Link Asia/Jerusalem Asia/Tel_Aviv Link Asia/Thimphu Asia/Thimbu Link Asia/Makassar Asia/Ujung_Pandang Link Asia/Ulaanbaatar Asia/Ulan_Bator @@ -88,10 +90,10 @@ Link Pacific/Auckland NZ Link Pacific/Chatham NZ-CHAT Link America/Denver Navajo Link Asia/Shanghai PRC +Link Pacific/Pohnpei Pacific/Ponape Link Pacific/Pago_Pago Pacific/Samoa -Link Pacific/Chuuk Pacific/Yap Link Pacific/Chuuk Pacific/Truk -Link Pacific/Pohnpei Pacific/Ponape +Link Pacific/Chuuk Pacific/Yap Link Europe/Warsaw Poland Link Europe/Lisbon Portugal Link Asia/Taipei ROC Modified: stable/6/share/zoneinfo/etcetera ============================================================================== --- stable/6/share/zoneinfo/etcetera Tue Nov 5 06:40:35 2013 (r257684) +++ stable/6/share/zoneinfo/etcetera Tue Nov 5 06:42:01 2013 (r257685) @@ -31,9 +31,9 @@ Link Etc/GMT Etc/GMT0 # even though this is the opposite of what many people expect. # POSIX has positive signs west of Greenwich, but many people expect # positive signs east of Greenwich. For example, TZ='Etc/GMT+4' uses -# the abbreviation "GMT+4" and corresponds to 4 hours behind UTC +# the abbreviation "GMT+4" and corresponds to 4 hours behind UT # (i.e. west of Greenwich) even though many people would expect it to -# mean 4 hours ahead of UTC (i.e. east of Greenwich). +# mean 4 hours ahead of UT (i.e. east of Greenwich). # # In the draft 5 of POSIX 1003.1-200x, the angle bracket notation allows for # TZ='<GMT-4>+4'; if you want time zone abbreviations conforming to Modified: stable/6/share/zoneinfo/europe ============================================================================== --- stable/6/share/zoneinfo/europe Tue Nov 5 06:40:35 2013 (r257684) +++ stable/6/share/zoneinfo/europe Tue Nov 5 06:42:01 2013 (r257685) @@ -42,7 +42,7 @@ # </a> (1998-09-21, in Portuguese) # -# I invented the abbreviations marked `*' in the following table; +# I invented the abbreviations marked '*' in the following table; # the rest are from earlier versions of this file, or from other sources. # Corrections are welcome! # std dst 2dst @@ -96,7 +96,7 @@ # and a sketch map showing some of the sightlines involved. One paragraph # of the text said: # -# `An old stone obelisk marking a forgotten terrestrial meridian stands +# 'An old stone obelisk marking a forgotten terrestrial meridian stands # beside the river at Kew. In the 18th century, before time and longitude # was standardised by the Royal Observatory in Greenwich, scholars observed # this stone and the movement of stars from Kew Observatory nearby. They @@ -140,7 +140,7 @@ # From Paul Eggert (2003-09-27): # Summer Time was first seriously proposed by William Willett (1857-1915), # a London builder and member of the Royal Astronomical Society -# who circulated a pamphlet ``The Waste of Daylight'' (1907) +# who circulated a pamphlet "The Waste of Daylight" (1907) # that proposed advancing clocks 20 minutes on each of four Sundays in April, # and retarding them by the same amount on four Sundays in September. # A bill was drafted in 1909 and introduced in Parliament several times, @@ -165,10 +165,10 @@ # </a> # From Paul Eggert (1996-09-03): -# The OED Supplement says that the English originally said ``Daylight Saving'' +# The OED Supplement says that the English originally said "Daylight Saving" # when they were debating the adoption of DST in 1908; but by 1916 this # term appears only in quotes taken from DST's opponents, whereas the -# proponents (who eventually won the argument) are quoted as using ``Summer''. +# proponents (who eventually won the argument) are quoted as using "Summer". # From Arthur David Olson (1989-01-19): # @@ -208,9 +208,9 @@ # which could not be said to run counter to any official description. # From Paul Eggert (2000-10-02): -# Howse writes (p 157) `DBST' too, but `BDST' seems to have been common +# Howse writes (p 157) 'DBST' too, but 'BDST' seems to have been common # and follows the more usual convention of putting the location name first, -# so we use `BDST'. +# so we use 'BDST'. # Peter Ilieve (1998-04-19) described at length # the history of summer time legislation in the United Kingdom. @@ -431,6 +431,8 @@ Rule GB-Eire 1981 1989 - Oct Sun>=23 1:0 Rule GB-Eire 1990 1995 - Oct Sun>=22 1:00u 0 GMT # Summer Time Order 1997 (S.I. 1997/2982) # See EU for rules starting in 1996. +# +# Use Europe/London for Jersey, Guernsey, and the Isle of Man. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Europe/London -0:01:15 - LMT 1847 Dec 1 0:00s @@ -797,7 +799,7 @@ Zone Europe/Brussels 0:17:30 - LMT 1880 1:00 EU CE%sT # Bosnia and Herzegovina -# see Serbia +# See Europe/Belgrade. # Bulgaria # @@ -825,10 +827,10 @@ Zone Europe/Sofia 1:33:16 - LMT 1880 2:00 EU EE%sT # Croatia -# see Serbia +# See Europe/Belgrade. # Cyprus -# Please see the `asia' file for Asia/Nicosia. +# Please see the 'asia' file for Asia/Nicosia. # Czech Republic # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S @@ -845,6 +847,7 @@ Zone Europe/Prague 0:57:44 - LMT 1850 1:00 C-Eur CE%sT 1944 Sep 17 2:00s 1:00 Czech CE%sT 1979 1:00 EU CE%sT +# Use Europe/Prague also for Slovakia. # Denmark, Faroe Islands, and Greenland @@ -1008,12 +1011,12 @@ Zone America/Thule -4:35:08 - LMT 1916 J # From Peter Ilieve (1996-10-28): # [IATA SSIM (1992/1996) claims that the Baltic republics switch at 01:00s, # but a relative confirms that Estonia still switches at 02:00s, writing:] -# ``I do not [know] exactly but there are some little different +# "I do not [know] exactly but there are some little different # (confusing) rules for International Air and Railway Transport Schedules # conversion in Sunday connected with end of summer time in Estonia.... # A discussion is running about the summer time efficiency and effect on # human physiology. It seems that Estonia maybe will not change to -# summer time next spring.'' +# summer time next spring." # From Peter Ilieve (1998-11-04), heavily edited: # <a href="http://trip.rk.ee/cgi-bin/thw?${BASE}=akt&${OOHTML}=rtd&TA=1998&TO=1&AN=1390">; @@ -1068,7 +1071,7 @@ Zone Europe/Tallinn 1:39:00 - LMT 1880 # Well, here in Helsinki we're just changing from summer time to regular one, # and it's supposed to change at 4am... -# From Janne Snabb (2010-0715): +# From Janne Snabb (2010-07-15): # # I noticed that the Finland data is not accurate for years 1981 and 1982. # During these two first trial years the DST adjustment was made one hour @@ -1125,7 +1128,7 @@ Link Europe/Helsinki Europe/Mariehamn # -# Shank & Pottenger seem to use `24:00' ambiguously; resolve it with Whitman. +# Shank & Pottenger seem to use '24:00' ambiguously; resolve it with Whitman. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule France 1916 only - Jun 14 23:00s 1:00 S Rule France 1916 1919 - Oct Sun>=1 23:00s 0 - @@ -1415,7 +1418,7 @@ Zone Atlantic/Reykjavik -1:27:24 - LMT 1 # <a href="http://toi.iriti.cnr.it/uk/ienitlt.html">; # Day-light Saving Time in Italy (2006-02-03) # </a> -# (`FP' below), taken from an Italian National Electrotechnical Institute +# ('FP' below), taken from an Italian National Electrotechnical Institute # publication. When the three sources disagree, guess who's right, as follows: # # year FP Shanks&P. (S) Whitman (W) Go with: @@ -1561,10 +1564,22 @@ Zone Europe/Riga 1:36:24 - LMT 1880 2:00 EU EE%sT # Liechtenstein -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Europe/Vaduz 0:38:04 - LMT 1894 Jun - 1:00 - CET 1981 - 1:00 EU CE%sT + +# From Paul Eggert (2013-09-09): +# Shanks & Pottenger say Vaduz is like Zurich. + +# From Alois Treindl (2013-09-18): +# http://www.eliechtensteinensia.li/LIJ/1978/1938-1978/1941.pdf +# ... confirms on p. 6 that Liechtenstein followed Switzerland in 1941 and 1942. +# I ... translate only the last two paragraphs: +# ... during second world war, in the years 1941 and 1942, Liechtenstein +# introduced daylight saving time, adapting to Switzerland. From 1943 on +# central European time was in force throughout the year. +# From a report of the duke's government to the high council, +# regarding the introduction of a time law, of 31 May 1977. + +Link Europe/Zurich Europe/Vaduz + # Lithuania @@ -1652,7 +1667,7 @@ Zone Europe/Luxembourg 0:24:36 - LMT 190 1:00 EU CE%sT # Macedonia -# see Serbia +# See Europe/Belgrade. # Malta # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S @@ -1745,7 +1760,7 @@ Zone Europe/Monaco 0:29:32 - LMT 1891 Ma 1:00 EU CE%sT # Montenegro -# see Serbia +# See Europe/Belgrade. # Netherlands @@ -1860,7 +1875,7 @@ Zone Europe/Oslo 0:43:00 - LMT 1895 Jan # before 1895, and therefore probably changed the local time somewhere # between 1895 and 1925 (inclusive). -# From Paul Eggert (2001-05-01): +# From Paul Eggert (2013-09-04): # # Actually, Jan Mayen was never occupied by Germany during World War II, # so it must have diverged from Oslo time during the war, as Oslo was @@ -1871,7 +1886,7 @@ Zone Europe/Oslo 0:43:00 - LMT 1895 Jan # 1941 with a small Norwegian garrison and continued operations despite # frequent air ttacks from Germans. In 1943 the Americans established a # radiolocating station on the island, called "Atlantic City". Possibly -# the UTC offset changed during the war, but I think it unlikely that +# the UT offset changed during the war, but I think it unlikely that # Jan Mayen used German daylight-saving rules. # # Svalbard is more complicated, as it was raided in August 1941 by an @@ -1884,9 +1899,8 @@ Zone Europe/Oslo 0:43:00 - LMT 1895 Jan # the German armed forces at the Svalbard weather station code-named # Haudegen did not surrender to the Allies until September 1945. # -# All these events predate our cutoff date of 1970. Unless we can -# come up with more definitive info about the timekeeping during the -# war years it's probably best just do...the following for now: +# All these events predate our cutoff date of 1970, so use Europe/Oslo +# for these regions. Link Europe/Oslo Arctic/Longyearbyen # Poland @@ -2144,7 +2158,7 @@ Zone Europe/Bucharest 1:44:24 - LMT 1891 # so we (Novosibirsk) simply did not switch. # # From Andrey A. Chernov (1996-10-04): -# `MSK' and `MSD' were born and used initially on Moscow computers with +# 'MSK' and 'MSD' were born and used initially on Moscow computers with # UNIX-like OSes by several developer groups (e.g. Demos group, Kiae group).... # The next step was the UUCP network, the Relcom predecessor # (used mainly for mail), and MSK/MSD was actively used there. @@ -2443,6 +2457,9 @@ Zone Asia/Anadyr 11:49:56 - LMT 1924 May 11:00 Russia ANA%sT 2011 Mar 27 2:00s 12:00 - ANAT +# San Marino +# See Europe/Rome. + # Serbia # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Europe/Belgrade 1:22:00 - LMT 1884 @@ -2465,7 +2482,7 @@ Link Europe/Belgrade Europe/Zagreb # Cro Link Europe/Prague Europe/Bratislava # Slovenia -# see Serbia +# See Europe/Belgrade. # Spain # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S @@ -2599,7 +2616,7 @@ Zone Europe/Stockholm 1:12:12 - LMT 1879 # and their performance improved enormously. Communities began to keep # mean time in preference to apparent time -- Geneva from 1780 .... # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S -# From Whitman (who writes ``Midnight?''): +# From Whitman (who writes "Midnight?"): # Rule Swiss 1940 only - Nov 2 0:00 1:00 S # Rule Swiss 1940 only - Dec 31 0:00 0 - # From Shanks & Pottenger: @@ -2644,23 +2661,53 @@ Zone Europe/Stockholm 1:12:12 - LMT 1879 # The 1940 rules must be deleted. # # One further detail for Switzerland, which is probably out of scope for -# most users of tzdata: -# The zone file -# Zone Europe/Zurich 0:34:08 - LMT 1848 Sep 12 -# 0:29:44 - BMT 1894 Jun #Bern Mean Time -# 1:00 Swiss CE%sT 1981 -# 1:00 EU CE%sT +# most users of tzdata: The [Europe/Zurich zone] ... # describes all of Switzerland correctly, with the exception of # the Cantone Geneve (Geneva, Genf). Between 1848 and 1894 Geneve did not # follow Bern Mean Time but kept its own local mean time. # To represent this, an extra zone would be needed. +# +# From Alois Treindl (2013-09-11): +# The Federal regulations say +# http://www.admin.ch/opc/de/classified-compilation/20071096/index.html +# ... the meridian for Bern mean time ... is 7 degrees 26'22.50". +# Expressed in time, it is 0h29m45.5s. + +# From Pierre-Yves Berger (2013-09-11): +# the "Circulaire du conseil federal" (December 11 1893) +# <http://www.amtsdruckschriften.bar.admin.ch/viewOrigDoc.do?id=10071353>; ... +# clearly states that the [1894-06-01] change should be done at midnight +# but if no one is present after 11 at night, could be postponed until one +# hour before the beginning of service. + +# From Paul Eggert (2013-09-11): +# Round BMT to the nearest even second, 0:29:46. +# +# We can find no reliable source for Shanks's assertion that all of Switzerland +# except Geneva switched to Bern Mean Time at 00:00 on 1848-09-12. This book: +# +# Jakob Messerli. Gleichmassig, punktlich, schnell: Zeiteinteilung und +# Zeitgebrauch in der Schweiz im 19. Jahrhundert. Chronos, Zurich 1995, +# ISBN 3-905311-68-2, OCLC 717570797. +# +# suggests that the transition was more gradual, and that the Swiss did not +# agree about civil time during the transition. The timekeeping it gives the +# most detail for is postal and telegraph time: here, federal legislation (the +# "Bundesgesetz uber die Erstellung von elektrischen Telegraphen") passed on +# 1851-11-23, and an official implementation notice was published 1853-07-16 +# (Bundesblatt 1853, Bd. II, S. 859). On p 72 Messerli writes that in +# practice since July 1853 Bernese time was used in "all postal and telegraph +# offices in Switzerland from Geneva to St. Gallen and Basel to Chiasso" +# (Google translation). For now, model this transition as occurring on +# 1853-07-16, though it probably occurred at some other date in Zurich, and +# legal civil time probably changed at still some other transition date. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Swiss 1941 1942 - May Mon>=1 1:00 1:00 S Rule Swiss 1941 1942 - Oct Mon>=1 2:00 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Europe/Zurich 0:34:08 - LMT 1848 Sep 12 - 0:29:44 - BMT 1894 Jun # Bern Mean Time +Zone Europe/Zurich 0:34:08 - LMT 1853 Jul 16 # See above comment. + 0:29:46 - BMT 1894 Jun # Bern Mean Time 1:00 Swiss CE%sT 1981 1:00 EU CE%sT @@ -2884,7 +2931,7 @@ Zone Europe/Simferopol 2:16:24 - LMT 188 # From Paul Eggert (2006-03-22): # The _Economist_ (1994-05-28, p 45) reports that central Crimea switched # from Kiev to Moscow time sometime after the January 1994 elections. -# Shanks (1999) says ``date of change uncertain'', but implies that it happened +# Shanks (1999) says "date of change uncertain", but implies that it happened # sometime between the 1994 DST switches. Shanks & Pottenger simply say # 1994-09-25 03:00, but that can't be right. For now, guess it # changed in May. @@ -2898,6 +2945,9 @@ Zone Europe/Simferopol 2:16:24 - LMT 188 3:00 - MSK 1997 Mar lastSun 1:00u 2:00 EU EE%sT +# Vatican City +# See Europe/Rome. + ############################################################################### # One source shows that Bulgaria, Cyprus, Finland, and Greece observe DST from Copied: stable/6/share/zoneinfo/leap-seconds.list (from r257681, head/contrib/tzdata/leap-seconds.list) ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ stable/6/share/zoneinfo/leap-seconds.list Tue Nov 5 06:42:01 2013 (r257685, copy of r257681, head/contrib/tzdata/leap-seconds.list) @@ -0,0 +1,231 @@ +# +# In the following text, the symbol '#' introduces +# a comment, which continues from that symbol until +# the end of the line. A plain comment line has a +# whitespace character following the comment indicator. +# There are also special comment lines defined below. +# A special comment will always have a non-whitespace +# character in column 2. +# +# A blank line should be ignored. +# +# The following table shows the corrections that must +# be applied to compute International Atomic Time (TAI) +# from the Coordinated Universal Time (UTC) values that +# are transmitted by almost all time services. +# +# The first column shows an epoch as a number of seconds +# since 1900.0 and the second column shows the number of +# seconds that must be added to UTC to compute TAI for +# any timestamp at or after that epoch. The value on +# each line is valid from the indicated initial instant +# until the epoch given on the next one or indefinitely +# into the future if there is no next line. +# (The comment on each line shows the representation of +# the corresponding initial epoch in the usual +# day-month-year format. The epoch always begins at +# 00:00:00 UTC on the indicated day. See Note 5 below.) +# +# Important notes: +# +# 1. Coordinated Universal Time (UTC) is often referred to +# as Greenwich Mean Time (GMT). The GMT time scale is no +# longer used, and the use of GMT to designate UTC is +# discouraged. +# +# 2. The UTC time scale is realized by many national +# laboratories and timing centers. Each laboratory +# identifies its realization with its name: Thus +# UTC(NIST), UTC(USNO), etc. The differences among +# these different realizations are typically on the +# order of a few nanoseconds (i.e., 0.000 000 00x s) +# and can be ignored for many purposes. These differences +# are tabulated in Circular T, which is published monthly +# by the International Bureau of Weights and Measures +# (BIPM). See www.bipm.fr for more information. +# +# 3. The current defintion of the relationship between UTC +# and TAI dates from 1 January 1972. A number of different +# time scales were in use before than epoch, and it can be +# quite difficult to compute precise timestamps and time +# intervals in those "prehistoric" days. For more information, +# consult: +# +# The Explanatory Supplement to the Astronomical +# Ephemeris. +# or +# Terry Quinn, "The BIPM and the Accurate Measurement +# of Time," Proc. of the IEEE, Vol. 79, pp. 894-905, +# July, 1991. +# +# 4. The insertion of leap seconds into UTC is currently the +# responsibility of the International Earth Rotation Service, +# which is located at the Paris Observatory: +# +# Central Bureau of IERS +# 61, Avenue de l'Observatoire +# 75014 Paris, France. +# +# Leap seconds are announced by the IERS in its Bulletin C +# +# See hpiers.obspm.fr or www.iers.org for more details. +# +# All national laboratories and timing centers use the +# data from the BIPM and the IERS to construct their +# local realizations of UTC. +# +# Although the definition also includes the possibility +# of dropping seconds ("negative" leap seconds), this has +# never been done and is unlikely to be necessary in the +# foreseeable future. +# +# 5. If your system keeps time as the number of seconds since +# some epoch (e.g., NTP timestamps), then the algorithm for +# assigning a UTC time stamp to an event that happens during a positive +# leap second is not well defined. The official name of that leap +# second is 23:59:60, but there is no way of representing that time +# in these systems. +# Many systems of this type effectively stop the system clock for +# one second during the leap second and use a time that is equivalent +# to 23:59:59 UTC twice. For these systems, the corresponding TAI +# timestamp would be obtained by advancing to the next entry in the +# following table when the time equivalent to 23:59:59 UTC +# is used for the second time. Thus the leap second which +# occurred on 30 June 1972 at 23:59:59 UTC would have TAI +# timestamps computed as follows: +# +# ... +# 30 June 1972 23:59:59 (2287785599, first time): TAI= UTC + 10 seconds +# 30 June 1972 23:59:60 (2287785599,second time): TAI= UTC + 11 seconds +# 1 July 1972 00:00:00 (2287785600) TAI= UTC + 11 seconds +# ... +# +# If your system realizes the leap second by repeating 00:00:00 UTC twice +# (this is possible but not usual), then the advance to the next entry +# in the table must occur the second time that a time equivlent to +# 00:00:00 UTC is used. Thus, using the same example as above: +# +# ... +# 30 June 1972 23:59:59 (2287785599): TAI= UTC + 10 seconds +# 30 June 1972 23:59:60 (2287785600, first time): TAI= UTC + 10 seconds +# 1 July 1972 00:00:00 (2287785600,second time): TAI= UTC + 11 seconds +# ... +# +# in both cases the use of timestamps based on TAI produces a smooth +# time scale with no discontinuity in the time interval. +# +# This complexity would not be needed for negative leap seconds (if they +# are ever used). The UTC time would skip 23:59:59 and advance from +# 23:59:58 to 00:00:00 in that case. The TAI offset would decrease by +# 1 second at the same instant. This is a much easier situation to deal +# with, since the difficulty of unambiguously representing the epoch +# during the leap second does not arise. +# +# Questions or comments to: +# Judah Levine +# Time and Frequency Division +# NIST +# Boulder, Colorado +# jlevine@boulder.nist.gov +# +# Last Update of leap second values: 11 January 2012 +# +# The following line shows this last update date in NTP timestamp *** DIFF OUTPUT TRUNCATED AT 1000 LINES ***
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