proposed time zone package changes
Arthur David Olson
olsona at lecserver.nci.nih.gov
Sat Jul 17 15:15:39 UTC 2010
Below find proposed changes to the time zone package.
The executive summary:
* australasia Change Pacific/Truk to Pacific/Chuuk
(with corresponding time zone abbreviation change)
and change Pacific/Ponape to Pacific/Pohnpei
(with thanks to Clint Adams).
* backward add Pacific/Truk and Pacific/Ponape links
and adjust Pacific/Yap link.
* europe Change Finland transition times in 1981 and 1982
(with thanks to Janne Snabb).
* leapseconds Update comments with latest IERS leap second bulletin.
* northamerica Correct instant of 2010 move between time zones in
Bahia de Banderas.
Add comments from Mark Brader on DST in Windsor.
Add comments on Canadian DST in 1930 from the
Journal of the Royal Astronomical Society of Canada.
* tz-link.htm Add link to http://code.google.com/p/tzdata/
(from Rich Tibbett).
* zone.tab Change Pacific/Truk to Pacific/Chuuk and
change Pacific/Ponape to Pacific/Pohnpei
(More research is needed on when Windsor, Ontario started using DST
before adding a Windsor time zone.)
If no problems are found, these changes will appear on the ftp site on
2010-07-26.
--ado
diff -c old/australasia new/australasia
*** old/australasia Mon May 10 09:07:27 2010
--- new/australasia Sat Jul 17 09:14:35 2010
***************
*** 1,5 ****
# <pre>
! # @(#)australasia 8.17
# This file is in the public domain, so clarified as of
# 2009-05-17 by Arthur David Olson.
--- 1,5 ----
# <pre>
! # @(#)australasia 8.18
# This file is in the public domain, so clarified as of
# 2009-05-17 by Arthur David Olson.
***************
*** 346,355 ****
# Micronesia
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
! Zone Pacific/Truk 10:07:08 - LMT 1901
! 10:00 - TRUT # Truk Time
! Zone Pacific/Ponape 10:32:52 - LMT 1901 # Kolonia
! 11:00 - PONT # Ponape Time
Zone Pacific/Kosrae 10:51:56 - LMT 1901
11:00 - KOST 1969 Oct # Kosrae Time
12:00 - KOST 1999
--- 346,355 ----
# Micronesia
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
! Zone Pacific/Chuuk 10:07:08 - LMT 1901
! 10:00 - CHUT # Chuuk Time
! Zone Pacific/Pohnpei 10:32:52 - LMT 1901 # Kolonia
! 11:00 - PONT # Pohnpei Time
Zone Pacific/Kosrae 10:51:56 - LMT 1901
11:00 - KOST 1969 Oct # Kosrae Time
12:00 - KOST 1999
diff -c old/backward new/backward
*** old/backward Mon May 10 09:07:27 2010
--- new/backward Sat Jul 17 09:14:35 2010
***************
*** 1,5 ****
# <pre>
! # @(#)backward 8.8
# This file is in the public domain, so clarified as of
# 2009-05-17 by Arthur David Olson.
--- 1,5 ----
# <pre>
! # @(#)backward 8.9
# This file is in the public domain, so clarified as of
# 2009-05-17 by Arthur David Olson.
***************
*** 90,96 ****
Link America/Denver Navajo
Link Asia/Shanghai PRC
Link Pacific/Pago_Pago Pacific/Samoa
! Link Pacific/Truk Pacific/Yap
Link Europe/Warsaw Poland
Link Europe/Lisbon Portugal
Link Asia/Taipei ROC
--- 90,98 ----
Link America/Denver Navajo
Link Asia/Shanghai PRC
Link Pacific/Pago_Pago Pacific/Samoa
! Link Pacific/Chuuk Pacific/Yap
! Link Pacific/Chuuk Pacific/Truk
! Link Pacific/Pohnpei Pacific/Ponape
Link Europe/Warsaw Poland
Link Europe/Lisbon Portugal
Link Asia/Taipei ROC
diff -c old/europe new/europe
*** old/europe Mon May 10 09:07:27 2010
--- new/europe Sat Jul 17 09:05:51 2010
***************
*** 1,5 ****
# <pre>
! # @(#)europe 8.26
# This file is in the public domain, so clarified as of
# 2009-05-17 by Arthur David Olson.
--- 1,5 ----
# <pre>
! # @(#)europe 8.27
# This file is in the public domain, so clarified as of
# 2009-05-17 by Arthur David Olson.
***************
*** 1013,1034 ****
2:00 EU EE%sT
# Finland
! #
# From Hannu Strang (1994-09-25 06:03:37 UTC):
# Well, here in Helsinki we're just changing from summer time to regular one,
# and it's supposed to change at 4am...
#
! # From Paul Eggert (2006-03-22):
! # Shanks & Pottenger say Finland has switched at 02:00 standard time
! # since 1981. Go with Strang instead.
#
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Finland 1942 only - Apr 3 0:00 1:00 S
Rule Finland 1942 only - Oct 3 0:00 0 -
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Europe/Helsinki 1:39:52 - LMT 1878 May 31
1:39:52 - HMT 1921 May # Helsinki Mean Time
! 2:00 Finland EE%sT 1981 Mar 29 2:00
2:00 EU EE%sT
# Aaland Is
--- 1013,1059 ----
2:00 EU EE%sT
# Finland
!
# From Hannu Strang (1994-09-25 06:03:37 UTC):
# 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):
#
! # 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
! # earlier than in forthcoming years. Starting 1983 the adjustment was made
! # according to the central European standards.
#
+ # This is documented in Heikki Oja: Aikakirja 2007, published by The Almanac
+ # Office of University of Helsinki, ISBN 952-10-3221-9, available online (in
+ # Finnish) at
+ #
+ # <a href="http://almanakka.helsinki.fi/aikakirja/Aikakirja2007kokonaan.pdf">
+ # http://almanakka.helsinki.fi/aikakirja/Aikakirja2007kokonaan.pdf
+ # </a>
+ #
+ # Page 105 (56 in PDF version) has a handy table of all past daylight savings
+ # transitions. It is easy enough to interpret without Finnish skills.
+ #
+ # This is also confirmed by Finnish Broadcasting Company's archive at:
+ #
+ # <a href="http://www.yle.fi/elavaarkisto/?s=s&g=1&ag=5&t=&a=3401">
+ # http://www.yle.fi/elavaarkisto/?s=s&g=1&ag=5&t=&a=3401
+ # </a>
+ #
+ # The news clip from 1981 says that "the time between 2 and 3 o'clock does not
+ # exist tonight."
+
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Finland 1942 only - Apr 3 0:00 1:00 S
Rule Finland 1942 only - Oct 3 0:00 0 -
+ Rule Finland 1981 1982 - Mar lastSun 2:00 1:00 S
+ Rule Finland 1981 1982 - Sep lastSun 3:00 0 -
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Europe/Helsinki 1:39:52 - LMT 1878 May 31
1:39:52 - HMT 1921 May # Helsinki Mean Time
! 2:00 Finland EE%sT 1983
2:00 EU EE%sT
# Aaland Is
diff -c old/leapseconds new/leapseconds
*** old/leapseconds Mon May 10 09:07:28 2010
--- new/leapseconds Sat Jul 17 08:51:09 2010
***************
*** 1,5 ****
# <pre>
! # @(#)leapseconds 8.9
# This file is in the public domain, so clarified as of
# 2009-05-17 by Arthur David Olson.
--- 1,5 ----
# <pre>
! # @(#)leapseconds 8.10
# This file is in the public domain, so clarified as of
# 2009-05-17 by Arthur David Olson.
***************
*** 60,68 ****
# FAX : 33 (0) 1 40 51 22 91
# Internet : services.iers at obspm.fr
#
! # Paris, 4 July 2009
#
! # Bulletin C 38
#
# To authorities responsible
# for the measurement and
--- 60,68 ----
# FAX : 33 (0) 1 40 51 22 91
# Internet : services.iers at obspm.fr
#
! # Paris, 14 July 2010
#
! # Bulletin C 40
#
# To authorities responsible
# for the measurement and
***************
*** 70,78 ****
#
# INFORMATION ON UTC - TAI
#
! # NO positive leap second will be introduced at the end of December 2009.
# The difference between Coordinated Universal Time UTC and the
! # International Atomic Time TAI is :
#
# from 2009 January 1, 0h UTC, until further notice : UTC-TAI = -34 s
#
--- 70,78 ----
#
# INFORMATION ON UTC - TAI
#
! # NO positive leap second will be introduced at the end of December 2010.
# The difference between Coordinated Universal Time UTC and the
! # International Atomic Time TAI is :
#
# from 2009 January 1, 0h UTC, until further notice : UTC-TAI = -34 s
#
***************
*** 82,87 ****
# will be no time step at the next possible date.
#
# Daniel GAMBIS
! # Director
# Earth Orientation Center of IERS
# Observatoire de Paris, France
--- 82,87 ----
# will be no time step at the next possible date.
#
# Daniel GAMBIS
! # Director
# Earth Orientation Center of IERS
# Observatoire de Paris, France
diff -c old/northamerica new/northamerica
*** old/northamerica Mon May 10 09:07:27 2010
--- new/northamerica Sat Jul 17 10:07:20 2010
***************
*** 1,5 ****
# <pre>
! # @(#)northamerica 8.31
# This file is in the public domain, so clarified as of
# 2009-05-17 by Arthur David Olson.
--- 1,5 ----
# <pre>
! # @(#)northamerica 8.34
# This file is in the public domain, so clarified as of
# 2009-05-17 by Arthur David Olson.
***************
*** 1324,1329 ****
--- 1324,1406 ----
# entry since our cutoff date of 1970, so we can move
# America/Coral_Harbour to the 'backward' file.
+ # From Mark Brader (2010-03-06):
+ #
+ # Currently the database has:
+ #
+ # # Ontario
+ #
+ # # From Paul Eggert (2006-07-09):
+ # # Shanks & Pottenger write that since 1970 most of Ontario has been like
+ # # Toronto.
+ # # Thunder Bay skipped DST in 1973.
+ # # Many smaller locales did not observe peacetime DST until 1974;
+ # # Nipigon (EST) and Rainy River (CST) are the largest that we know of.
+ #
+ # In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom
+ # right corner of page 1, it says that Toronto will return to standard
+ # time at 2 am Sunday morning (which agrees with the database), and that:
+ #
+ # The one-hour setback will go into effect throughout most of Ontario,
+ # except in areas like Windsor which remains on standard time all year.
+ #
+ # Windsor is, of course, a lot larger than Nipigon.
+ #
+ # I only came across this incidentally. I don't know if Windsor began
+ # observing DST when Detroit did, or in 1974, or on some other date.
+ #
+ # By the way, the article continues by noting that:
+ #
+ # Some cities in the United States have pushed the deadline back
+ # three weeks and will change over from daylight saving in October.
+
+ # From Arthur David Olson (2010-07-17):
+ #
+ # "Standard Time and Time Zones in Canada" appeared in
+ # The Journal of The Royal Astronomical Society of Canada,
+ # volume 26, number 2 (February 1932) and, as of 2010-07-17,
+ # was available at
+ # <a href="http://adsabs.harvard.edu/full/1932JRASC..26...49S">
+ # http://adsabs.harvard.edu/full/1932JRASC..26...49S
+ # </a>
+ #
+ # It includes the text below (starting on page 57):
+ #
+ # A list of the places in Canada using daylight saving time would
+ # require yearly revision. From information kindly furnished by
+ # the provincial governments and by the postmasters in many cities
+ # and towns, it is found that the following places used daylight sav-
+ # ing in 1930. The information for the province of Quebec is definite,
+ # for the other provinces only approximate:
+ #
+ # Province Daylight saving time used
+ # Prince Edward Island Not used.
+ # Nova Scotia In Halifax only.
+ # New Brunswick In St. John only.
+ # Quebec In the following places:
+ # Montreal Lachine
+ # Quebec Mont-Royal
+ # Levis Iberville
+ # St. Lambert Cap de la Madeleine
+ # Verdun Loretteville
+ # Westmount Richmond
+ # Outremont St. Jerome
+ # Longueuil Greenfield Park
+ # Arvida Waterloo
+ # Chambly-Canton Beaulieu
+ # Melbourne La Tuque
+ # St. Theophile Buckingham
+ # Ontario Used generally in the cities and towns along
+ # the southerly part of the province. Not
+ # used in the northwesterlhy part.
+ # Manitoba Not used.
+ # Saskatchewan In Regina only.
+ # Alberta Not used.
+ # British Columbia Not used.
+ #
+ # With some exceptions, the use of daylight saving may be said to be limited
+ # to those cities and towns lying between Quebec city and Windsor, Ont.
+
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Toronto 1919 only - Mar 30 23:30 1:00 D
Rule Toronto 1919 only - Oct 26 0:00 0 S
***************
*** 2147,2153 ****
-6:00 - CST 1942 Apr 24
-7:00 - MST 1949 Jan 14
-8:00 - PST 1970
! -7:00 Mexico M%sT 2010 Apr 4
-6:00 Mexico C%sT
# Baja California (near US border)
--- 2224,2230 ----
-6:00 - CST 1942 Apr 24
-7:00 - MST 1949 Jan 14
-8:00 - PST 1970
! -7:00 Mexico M%sT 2010 Apr 4 2:00
-6:00 Mexico C%sT
# Baja California (near US border)
diff -c old/tz-link.htm new/tz-link.htm
*** old/tz-link.htm Mon May 10 09:07:28 2010
--- new/tz-link.htm Sat Jul 17 08:56:39 2010
***************
*** 18,24 ****
<body>
<h1>Sources for Time Zone and Daylight Saving Time Data</h1>
<address>
! @(#)tz-link.htm 8.27
</address>
<p>
This file is in the public domain, so clarified as of
--- 18,24 ----
<body>
<h1>Sources for Time Zone and Daylight Saving Time Data</h1>
<address>
! @(#)tz-link.htm 8.28
</address>
<p>
This file is in the public domain, so clarified as of
***************
*** 351,356 ****
--- 351,367 ----
→ Tzid table</a> maintained by the <abbr
title="Common Locale Data Repository">CLDR</abbr> data mentioned
below.</li>
+ <li>
+ <a href="http://code.google.com/p/tzdata/">
+ http://code.google.com/p/tzdata/
+ </a>
+ provides programming-language-specific representations of timezone
+ data. Currently this includes XML, PHP, Ruby, Javascript, JSON and CSV
+ formatted data. The repository is updated as soon as the FTP
+ distribution is updated. All data can be downloaded as a zip and/or it
+ can be obtained/synced via anonymous SVN. Data is made available under
+ the MIT license. (From Rich Tibbett.)
+ </li>
</ul>
<h2>Maps</h2>
<ul>
diff -c old/zone.tab new/zone.tab
*** old/zone.tab Mon May 10 09:07:28 2010
--- new/zone.tab Sat Jul 17 09:14:35 2010
***************
*** 1,5 ****
# <pre>
! # @(#)zone.tab 8.36
# This file is in the public domain, so clarified as of
# 2009-05-17 by Arthur David Olson.
#
--- 1,5 ----
# <pre>
! # @(#)zone.tab 8.37
# This file is in the public domain, so clarified as of
# 2009-05-17 by Arthur David Olson.
#
***************
*** 177,184 ****
FI +6010+02458 Europe/Helsinki
FJ -1808+17825 Pacific/Fiji
FK -5142-05751 Atlantic/Stanley
! FM +0725+15147 Pacific/Truk Truk (Chuuk) and Yap
! FM +0658+15813 Pacific/Ponape Ponape (Pohnpei)
FM +0519+16259 Pacific/Kosrae Kosrae
FO +6201-00646 Atlantic/Faroe
FR +4852+00220 Europe/Paris
--- 177,184 ----
FI +6010+02458 Europe/Helsinki
FJ -1808+17825 Pacific/Fiji
FK -5142-05751 Atlantic/Stanley
! FM +0725+15147 Pacific/Chuuk Chuuk (Truk) and Yap
! FM +0658+15813 Pacific/Pohnpei Pohnpei (Ponape)
FM +0519+16259 Pacific/Kosrae Kosrae
FO +6201-00646 Atlantic/Faroe
FR +4852+00220 Europe/Paris
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