January 2006 - tz - lists.iana.org

proposed tz change for Latvia, Lithuania
by Paul Eggert May 25, 2015

May 25, 2015

It's March Madness time for daylight-saving rule changes. Here's a proposed change to the tz database to keep up with the latest political development, which affects time stamps starting March 29: * Latvia and Lithuania will not observe DST, starting this year. Thanks to Andrei Ivanov for this info. =================================================================== RCS file: RCS/europe,v retrieving revision 2000.3 retrieving revision 2000.3.0.1 diff -pu -r2000.3 -r2000.3.0.1 --- europe 2000/03/04 15:31:08 2000.3 +++ europe 2000/03/08 17:48:59 2000.3.0.1 @@ -1135,6 +1135,12 @@ Link Europe/Rome Europe/San_Marino # 1997-01-21 on transition to Summer time ... established the same order of # daylight savings time settings as in the States of the European Union. +# From Andrei Ivanov (2000-03-06): +# This year Latvia will not switch to Daylight Savings Time (as specified in +# <a href="http://www.lv-laiks.lv/wwwraksti/2000/071072/vd4.htm"> +# The Regulations of the Cabinet of Ministers of the Rep. of Latvia of +# 29-Feb-2000 (#79)</a>, in Latvian for subscribers only). + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Latvia 1989 1996 - Mar lastSun 2:00s 1:00 S Rule Latvia 1989 1996 - Sep lastSun 2:00s 0 - @@ -1151,7 +1157,8 @@ Zone Europe/Riga 1:36:24 - LMT 1880 3:00 Russia MSK/MSD 1989 Mar lastSun 2:00s 2:00 1:00 EEST 1989 Sep lastSun 2:00s 2:00 Latvia EE%sT 1997 Jan 21 - 2:00 EU EE%sT + 2:00 EU EE%sT 2000 Feb 29 + 2:00 - EET # Liechtenstein # Zone NAME GMTOFF RULES FORMAT [UNTIL] @@ -1178,6 +1185,11 @@ Zone Europe/Vaduz 0:38:04 - LMT 1894 Jun # motion to give up shifting to summer time in spring, as it was # already done by Estonia. +# From Andrei Ivanov (2000-03-06): +# I've heard that Ministers of three Baltic countries on their summit +# somewhere in February decided not to switch to summer time starting from +# this spring. + # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Europe/Vilnius 1:41:16 - LMT 1880 1:24:00 - WMT 1917 # Warsaw Mean Time @@ -1192,7 +1204,8 @@ Zone Europe/Vilnius 1:41:16 - LMT 1880 2:00 C-Eur EE%sT 1998 2:00 - EET 1998 Mar 29 1:00u 1:00 EU CE%sT 1999 Oct 31 1:00u - 2:00 EU EE%sT + 2:00 EU EE%sT 2000 Feb + 2:00 - EET # Luxembourg # Whitman disagrees with most of these dates in minor ways; go with Shanks.

5 5

Australia - Broken Hill - Yancowinna
by Oscar van Vlijmen Dec. 16, 2006

Dec. 16, 2006

Broken Hill, or more precise, the whole county of Yancowinna, differs from the rest of New South Wales, as clearly stated in the TZ database. Problem is: what is the "county of Yancowinna"? The Australian Standard Time Act 1987 mentions this county, but doesn't mention the county boundaries. Once they were known, but they have disappeared from recent maps. Finally I found a scan of an old map from the Land Registry, showing the Yancowinna county. Found on the website of The Sydney Morning Herald: <http://www.smh.com.au/articles/2003/08/29/1062050651816.html?oneclick=true> Click on field number 2 or download the map directly: <http://www.smh.com.au/specials/leases/pdf/map2.pdf> The following places are within the county boundaries: Broken Hill, The Gorge, Mount Gipps, Silverton, Stephens Creek, Wahratta, Yanco Glen. The name "Wahratta" is not perfectly readable from the map, but I've checked the name and location against the Australia file from the GEOnet Names Server <http://earth-info.nga.mil/gns/> Oscar van Vlijmen 2005-04-23

4 8

The 2003 North Dakota change
by Andy Lipscomb Jan. 31, 2006

Jan. 31, 2006

The largest city by far in either county is Mandan, but the report indicates they were already on Central time. Next largest, at a whopping 897 population, is New Salem. The only source of data I've found on that town is hometownlocator.com, which reports it to be at 46.845N and 101.41083W (the Census Bureau's TIGER mapper confirms that point is in the city, though not quite the center). That converts to DMS as +465042-1012439, yielding LMT of-6:45:39. If New Salem is also in the already-Central section (I suspect it is not, since it's a true rural area, and Mandan is the western part of Bismarck), next largest is Glen Ullin, at +464854-1014946 and an LMT of -6:47:19.

1 0

tzcode2006a.tar.gz and tzdata2006a.tar.gz
by Arthur David Olson Jan. 30, 2006

Jan. 30, 2006

The files ftp://elsie.nci.nih.gov/pub/tzcode2006a.tar.gz and ftp://elsie.nci.nih.gov/pub/tzdata2006a.tar.gz are now available. These reflect the changes circulated on the time zone mailing list on 2006-01-20 by Paul Eggert (in particular, Indiana time zone moves); they also reflect an addition to the zic manual page to describe how special-case transitions are handled. The versions above do NOT reflect 64-bit changes; the current (unchanged) plan is for those changes to show up on U. S. Presidents' Day (2006-02-20). --ado

1 0

Upcoming Indiana time zone moves
by Arthur David Olson Jan. 30, 2006

Jan. 30, 2006

My current sense: in the absence of clarification from the United States Department of Transportation (DOT), the way to proceed with the upcoming Indiana time zone moves is to handle them as direct transitions from Eastern Standard Time to Central Daylight Time (without wall clock changes). 1. This reflects what's happened historically in other places. 2. This reflects what I'd expect to happen in reality in Indiana-- folks in the affected areas will not change their clocks. 3. This reflects presumed regulatory intent. Given the peculiar characteristics of the particular second DOT chose for the transition, and the overwhelmingly larger number of seconds in a year, I believe it highly likely that DOT's choice was made with the intent of allowing the transition to occur without clocks changing. Also, there's no mention in the DOT docket of the need for changing clocks twice. I've attached changes to the "zic" manual page that document the reprogramming done back in the year 1996 to do direct transitions; the changes also provide information on how to get (very close to) a one-hour retreat followed one hour later by a one-hour advance. Since the affected regions will spend an hour in a nether-region between CDT and EST, perhaps a special time zone abbreviation is needed. The only letter between C and E is D: "Decidedly Odd Time" (DOT) :-) --ado ------- zic.8 ------- *** /tmp/geta8763 Tue Jan 24 12:03:21 2006 --- /tmp/getb8763 Tue Jan 24 12:03:21 2006 *************** *** 411,424 **** .q Rolling if the leap second time given by the other fields should be interpreted as local wall clock time. ! .SH NOTE For areas with more than two types of local time, you may need to use local standard time in the .B AT field of the earliest transition time's rule to ensure that the earliest transition time recorded in the compiled file is correct. .SH FILE /usr/local/etc/zoneinfo standard directory used for created files .SH "SEE ALSO" newctime(3), tzfile(5), zdump(8) ! .\" @(#)zic.8 7.22 --- 411,444 ---- .q Rolling if the leap second time given by the other fields should be interpreted as local wall clock time. ! .SH NOTES For areas with more than two types of local time, you may need to use local standard time in the .B AT field of the earliest transition time's rule to ensure that the earliest transition time recorded in the compiled file is correct. + .PP + If, + for a particular zone, + a clock advance caused by the start of daylight saving + coincides with and is equal to + a clock retreat caused by a change in UTC offset, + .IR zic + produces a single transition to daylight saving at the new UTC offset + (without any change in wall clock time). + If you want two separate transitions + (for example, + a one-hour retreat from + U. S. Eastern Standard Time + to + U. S. Central Standard Time + followed one hour later by a one-hour advance to + U. S. Central Daylight Time), + you can artificially + (and slightly inaccurately) + specify the UTC offset change as occuring a single second too early. .SH FILE /usr/local/etc/zoneinfo standard directory used for created files .SH "SEE ALSO" newctime(3), tzfile(5), zdump(8) ! .\" @(#)zic.8 7.23

3 3

Re: Upcoming Indiana time zone moves
by Arthur David Olson Jan. 26, 2006

Jan. 26, 2006

No news from DOT this morning. With Paul Eggert's technique in mind, below find a revised patch to the zic manual page. Barring new developments, on Monday I'll incorporate the manual changes and Paul's previously circulated data changes into the ftp version. --ado ------- zic.8 ------- *** /tmp/geta14571 Thu Jan 26 09:15:18 2006 --- /tmp/getb14571 Thu Jan 26 09:15:18 2006 *************** *** 411,424 **** .q Rolling if the leap second time given by the other fields should be interpreted as local wall clock time. ! .SH NOTE For areas with more than two types of local time, you may need to use local standard time in the .B AT field of the earliest transition time's rule to ensure that the earliest transition time recorded in the compiled file is correct. .SH FILE /usr/local/etc/zoneinfo standard directory used for created files .SH "SEE ALSO" newctime(3), tzfile(5), zdump(8) ! .\" @(#)zic.8 7.22 --- 411,436 ---- .q Rolling if the leap second time given by the other fields should be interpreted as local wall clock time. ! .SH NOTES For areas with more than two types of local time, you may need to use local standard time in the .B AT field of the earliest transition time's rule to ensure that the earliest transition time recorded in the compiled file is correct. + .PP + If, + for a particular zone, + a clock advance caused by the start of daylight saving + coincides with and is equal to + a clock retreat caused by a change in UTC offset, + .IR zic + produces a single transition to daylight saving at the new UTC offset + (without any change in wall clock time). + To get separate transitions + use multiple zone continuation lines + specifying transition instants using universal time. .SH FILE /usr/local/etc/zoneinfo standard directory used for created files .SH "SEE ALSO" newctime(3), tzfile(5), zdump(8) ! .\" @(#)zic.8 7.24

2 1

RE: Upcoming Indiana time zone moves
by Olson, Arthur David (NIH/NCI) [E] Jan. 26, 2006

Jan. 26, 2006

When a mountain-to-central change occurs as DST ends, the destination (central) time zone is already out of DST at the instant when the transition occurs; things get handled correctly without any special casing (take America/North_Dakota/Center, please.) --ado -----Original Message----- From: Andy Lipscomb [mailto:AndyLipscomb@decosimo.com] Sent: Thursday, January 26, 2006 10:03 AM To: tz(a)lecserver.nci.nih.gov Subject: RE: Upcoming Indiana time zone moves + .PP + If, + for a particular zone, + a clock advance caused by the start of daylight saving coincides with + and is equal to a clock retreat caused by a change in UTC offset, .IR + zic produces a single transition to daylight saving at the new UTC + offset (without any change in wall clock time). Can this be implemented also for the opposite case (daylight savings ends, but the offset is advanced)? This was the case with the M->C changes in the Dakotas.

1 0

RE: Upcoming Indiana time zone moves
by Andy Lipscomb Jan. 26, 2006

Jan. 26, 2006

+ .PP + If, + for a particular zone, + a clock advance caused by the start of daylight saving coincides with + and is equal to a clock retreat caused by a change in UTC offset, .IR + zic produces a single transition to daylight saving at the new UTC + offset (without any change in wall clock time). Can this be implemented also for the opposite case (daylight savings ends, but the offset is advanced)? This was the case with the M->C changes in the Dakotas.

1 0

proposed tz patches for Indiana, New Brunswick, Gaza, etc.
by Paul Eggert Jan. 26, 2006

Jan. 26, 2006

Here are some proposed changes to the tz database reflecting the recent flurry of email about Indiana, along with other news about New Brunswick and Gaza, and other less-important changes that I've been saving up. Changes to the tz data. * Create a new zone America/Indiana/Petersburg for Pike County, Indiana, which moved from central to eastern time in 1977. Thanks to Gwillim Law for the heads-up. * Adjust America/Indiana/Petersburg and America/Indiana/Knox, since Pike and Starke Counties will switch to CST in April. Create a new Zone America/Indiana/Vincennes for Daviess, Dubois, Knox, Martin, Perry, and Pulaski Counties, Indiana, which will also switch. Thanks to Deborah Goldsmith for the DOT news. * Create a new zone America/Moncton for New Brunswick, which recently announced that it will follow the new US rules in 2007. New Brunswick switches at 00:01, not 02:00, so it needs a separate zone. * In October 2005 Gaza switched at 02:00, not 01:00. Thanks to Steffen Thorsen for this info. Commentary fixes only. * Note that we don't have the data yet for the 2003-10-26 time zone change in Morton and Sioux Counties, North Dakota. Thanks to Gwillim Law for the heads-up. * Identify which Michigan counties were affected by the 1973 change. Thanks to Gwillim Law for the info. * Clinton and Russell Counties, Kentucky, were incorrectly referred to in a comment. Minor changes to rules that don't affect behavior. * Sort the Halifax rules by date, and use the same tabbing scheme as elsewhere. Fixes to the web page. * Mention the proposed IANA Time Zone Registry. * Mention iCalendar Basic. * Mention TZInfo, a new Ruby-based tz compiler. * Update references to Indiana, to reflect the recent changes. * Add a reference to Shanks's new edition (not yet available). * Add a reference to Steve Allen's fine Time Scales web page. * Add a reference to LeapSecond.com. * Mention the XML schema for date and time formats, and add a reference to Date & Time Formats on the Web. * Update URLs to reflect moved web pages. =================================================================== RCS file: RCS/asia,v retrieving revision 2005.18 retrieving revision 2005.18.0.1 diff -pu -r2005.18 -r2005.18.0.1 --- asia 2005/12/22 14:31:14 2005.18 +++ asia 2006/01/20 22:34:20 2005.18.0.1 @@ -934,6 +934,10 @@ Zone Asia/Tokyo 9:18:59 - LMT 1887 Dec 3 # From Paul Eggert (2005-11-22): # Starting 2003 transitions are from Steffen Thorsen's web site timeanddate.com. # +# From Steffen Thorsen (2005-11-23): +# For Jordan I have received multiple independent user reports every year +# about DST end dates, as the end-rule is different every year. +# # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Jordan 1973 only - Jun 6 0:00 1:00 S Rule Jordan 1973 1975 - Oct 1 0:00 0 - @@ -1433,6 +1437,12 @@ Zone Asia/Karachi 4:28:12 - LMT 1907 # From Paul Eggert (2005-11-22): # Starting 2004 transitions are from Steffen Thorsen's web site timeanddate.com. +# From Steffen Thorsen (2005-11-23): +# A user from Gaza reported that Gaza made the change early because of +# the Ramadan. Next year Ramadan will be even earlier, so I think +# there is a good chance next year's end date will be around two weeks +# earlier--the same goes for Jordan. + # The rules for Egypt are stolen from the `africa' file. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule EgyptAsia 1957 only - May 10 0:00 1:00 S @@ -1445,7 +1455,7 @@ Rule EgyptAsia 1966 only - Oct 1 3:00 0 Rule Palestine 1999 max - Apr Fri>=15 0:00 1:00 S Rule Palestine 1999 2003 - Oct Fri>=15 0:00 0 - Rule Palestine 2004 only - Oct 1 1:00 0 - -Rule Palestine 2005 max - Oct 4 1:00 0 - +Rule Palestine 2005 max - Oct 4 2:00 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Asia/Gaza 2:17:52 - LMT 1900 Oct =================================================================== RCS file: RCS/northamerica,v retrieving revision 2005.16 retrieving revision 2005.16.0.1 diff -pu -r2005.16 -r2005.16.0.1 --- northamerica 2005/12/27 14:26:54 2005.16 +++ northamerica 2006/01/20 22:34:20 2005.16.0.1 @@ -321,6 +321,14 @@ Zone America/Chicago -5:50:36 - LMT 1883 Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48 -7:00 US M%sT 1992 Oct 25 02:00 -6:00 US C%sT +# From Paul Eggert (2006-01-20): +# The following is not implemented yet. +# What is the most populous city in that area? +# From http://www.statoids.com/tus.html (2006-01-20): +# 2003-10-26 02:00: All of Morton County, ND, and the part of Sioux +# County, ND east of ND route 31 moved from MT to CT. (The area +# around Fort Yates in Sioux County and the area around Mandan in +# Morton County were already in CT.) # US mountain time, represented by Denver # @@ -519,9 +527,9 @@ Zone America/Boise -7:44:49 - LMT 1883 N # For a map of Indiana's time zone regions, see: # <a href="http://www.mccsc.edu/time.html"> # What time is it in Indiana? -# </a> (2005-05-03) +# </a> (2005-10-30) # -# From Paul Eggert (2005-08-22): +# From Paul Eggert (2006-01-20): # Since 1970, most of Indiana has been like America/Indiana/Indianapolis, # with the following exceptions: # @@ -533,11 +541,14 @@ Zone America/Boise -7:44:49 - LMT 1883 N # - Clark, Floyd, and Harrison counties have been like # America/Kentucky/Louisville. # -# - Crawford, Starke, and Switzerland counties have their own time zone +# - Daviess, Dubois, Knox, Martin, Perry, and Pulaski counties +# have been like America/Indiana/Vincennes. +# +# - Crawford, Pike, Starke, and Switzerland counties have their own time zone # histories as noted below. # -# Shanks partitions Indiana into 345 regions, each with its own time history, -# and writes ``Even newspaper reports present contradictory information.'' +# Shanks partitioned Indiana into 345 regions, each with its own time history, +# and wrote ``Even newspaper reports present contradictory information.'' # Fortunately, most of the complexity occurred before our cutoff date of 1970. # # Other than Indianapolis, the Indiana place names are so nondescript @@ -545,11 +556,19 @@ Zone America/Boise -7:44:49 - LMT 1883 N # So we reluctantly put them all in a subdirectory `America/Indiana'. # From Paul Eggert (2005-08-16): -# http://www.mccsc.edu/time.html says that Indiana will use DST starting 2006, -# and that many counties may switch either to Central or to Eastern time. -# The county-by-county decisions have not been made yet, so for now assume -# that no counties will switch: this assumption is most likely wrong, -# but it's the best we can do for now. +# http://www.mccsc.edu/time.html says that Indiana will use DST starting 2006. + +# From Deborah Goldsmith (2006-01-18): +# http://dmses.dot.gov/docimages/pdf95/382329_web.pdf +# From Paul Eggert (2006-01-20): +# It says "DOT is relocating the time zone boundary in Indiana to move Starke, +# Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the +# Eastern Time Zone to the Central Time Zone.... The effective date of +# this rule is 2:OO a.m. EST Sunday, April 2, 2006, which is the +# changeover date from standard time to Daylight Saving Time." +# Strictly speaking, this means the affected counties will change their +# clocks twice that night, but this obviously is in error. The intent +# is that 01:59:59 EST be followed by 02:00:00 CDT. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D @@ -568,8 +587,8 @@ Zone America/Indiana/Indianapolis -5:44: -5:00 - EST 2006 -5:00 US E%sT # -# Part of Crawford County, Indiana, last observed DST in 1975, -# and left its clocks alone in 1974. +# Eastern Crawford County, Indiana, left its clocks alone in 1974, +# as well as from 1976 through 2005. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule Marengo 1951 only - Apr lastSun 2:00 1:00 D Rule Marengo 1951 only - Sep lastSun 2:00 0 S @@ -586,7 +605,45 @@ Zone America/Indiana/Marengo -5:45:23 - -5:00 - EST 2006 -5:00 US E%sT # -# Starke County, Indiana +# Daviess, Dubois, Knox, Martin, Perry, and Pulaski Counties, Indiana, +# switched from eastern to central time in April 2006. +# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER +Rule Vincennes 1946 only - Apr lastSun 2:00 1:00 D +Rule Vincennes 1946 only - Sep lastSun 2:00 0 S +Rule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D +Rule Vincennes 1953 1959 - Sep lastSun 2:00 0 S +Rule Vincennes 1955 only - May 1 0:00 1:00 D +Rule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D +Rule Vincennes 1960 only - Oct lastSun 2:00 0 S +Rule Vincennes 1961 only - Sep lastSun 2:00 0 S +Rule Vincennes 1962 1963 - Oct lastSun 2:00 0 S +# Zone NAME GMTOFF RULES FORMAT [UNTIL] +Zone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53 + -6:00 US C%sT 1946 + -6:00 Vincennes C%sT 1964 Apr 26 2:00 + -5:00 - EST 1969 + -5:00 US E%sT 1971 + -5:00 - EST 2006 Apr 2 2:00 + -6:00 US C%sT +# +# Pike County, Indiana moved from central to eastern time in 1977, +# then switched back in 2006. +# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER +Rule Pike 1955 only - May 1 0:00 1:00 D +Rule Pike 1955 1960 - Sep lastSun 2:00 0 S +Rule Pike 1956 1964 - Apr lastSun 2:00 1:00 D +Rule Pike 1961 1964 - Oct lastSun 2:00 0 S +# Zone NAME GMTOFF RULES FORMAT [UNTIL] +Zone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53 + -6:00 US C%sT 1955 + -6:00 Pike C%sT 1965 Apr 25 2:00 + -5:00 - EST 1966 Oct 30 2:00 + -6:00 US C%sT 1977 Oct 30 2:00 + -5:00 - EST 2006 Apr 2 2:00 + -6:00 US C%sT +# +# Starke County, Indiana moved from central to eastern time in 1991, +# then switched back in 2006. # From Arthur David Olson (1991-10-28): # An article on page A3 of the Sunday, 1991-10-27 Washington Post # notes that Starke County switched from Central time to Eastern time as of @@ -603,10 +660,10 @@ Zone America/Indiana/Knox -5:46:30 - LMT -6:00 Starke C%sT 1962 Apr 29 2:00 -5:00 - EST 1963 Oct 27 2:00 -6:00 US C%sT 1991 Oct 27 2:00 - -5:00 - EST 2006 - -5:00 US E%sT + -5:00 - EST 2006 Apr 2 2:00 + -6:00 US C%sT # -# Switzerland County, Indiana, last observed DST in 1972. +# Switzerland County, Indiana, did not observe DST from 1973 through 2005. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44 -6:00 US C%sT 1954 Apr 25 2:00 @@ -636,7 +693,7 @@ Zone America/Kentucky/Louisville -5:43:0 -6:00 1:00 CDT 1974 Oct 27 2:00 -5:00 US E%sT # -# Wayne, Clinton, and Russell Counties, Kentucky +# Wayne County, Kentucky # # From # <a href="http://www.lake-cumberland.com/life/archive/news990129time.shtml"> @@ -733,7 +790,8 @@ Zone America/Detroit -5:32:11 - LMT 1905 -5:00 - EST 1975 Apr 27 2:00 -5:00 US E%sT # -# The Michigan border with Wisconsin switched from EST to CST/CDT in 1973. +# Dickinson, Gogebic, Iron, and Menominee Counties, Michigan, +# switched from EST to CST/CDT in 1973. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule Menominee 1946 only - Apr lastSun 2:00 1:00 D Rule Menominee 1946 only - Sep lastSun 2:00 0 S @@ -929,7 +987,7 @@ Zone America/Goose_Bay -4:01:40 - LMT 18 -4:00 StJohns A%sT -# west Labrador, New Brunswick, Nova Scotia, Prince Edward I +# west Labrador, Nova Scotia, Prince Edward I # From Paul Eggert (1996-06-12): # Shanks writes that since 1970 most of this region has been like Halifax. @@ -938,53 +996,48 @@ Zone America/Goose_Bay -4:01:40 - LMT 18 # Shanks also writes that Liverpool, NS was the only town in Canada to observe # DST in 1971 but not 1970; for now we'll assume this is a typo. -# From Paul Eggert (2000-10-02): -# INMS (2000-09-12) says that, since 1988 at least, New Brunswick switches -# at 00:01 local time. FIXME: verify and create a new Zone for this. - - # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S -Rule Halifax 1916 only - Apr 1 0:00 1:00 D -Rule Halifax 1916 only - Oct 1 0:00 0 S -Rule Halifax 1920 only - May 9 0:00 1:00 D -Rule Halifax 1920 only - Aug 29 0:00 0 S -Rule Halifax 1921 only - May 6 0:00 1:00 D -Rule Halifax 1921 1922 - Sep 5 0:00 0 S -Rule Halifax 1922 only - Apr 30 0:00 1:00 D -Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D -Rule Halifax 1923 only - Sep 4 0:00 0 S -Rule Halifax 1924 only - Sep 15 0:00 0 S -Rule Halifax 1925 only - Sep 28 0:00 0 S -Rule Halifax 1926 only - May 16 0:00 1:00 D -Rule Halifax 1926 only - Sep 13 0:00 0 S -Rule Halifax 1927 only - May 1 0:00 1:00 D -Rule Halifax 1927 only - Sep 26 0:00 0 S -Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D -Rule Halifax 1928 only - Sep 9 0:00 0 S -Rule Halifax 1929 only - Sep 3 0:00 0 S -Rule Halifax 1930 only - Sep 15 0:00 0 S -Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S -Rule Halifax 1932 only - May 1 0:00 1:00 D -Rule Halifax 1933 only - Apr 30 0:00 1:00 D -Rule Halifax 1933 only - Oct 2 0:00 0 S -Rule Halifax 1934 only - May 20 0:00 1:00 D -Rule Halifax 1934 only - Sep 16 0:00 0 S -Rule Halifax 1935 only - Jun 2 0:00 1:00 D -Rule Halifax 1935 only - Sep 30 0:00 0 S -Rule Halifax 1936 only - Jun 1 0:00 1:00 D -Rule Halifax 1936 only - Sep 14 0:00 0 S -Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D -Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S -Rule Halifax 1939 only - May 28 0:00 1:00 D -Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D -Rule Halifax 1946 1949 - Sep lastSun 2:00 0 S -Rule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D -Rule Halifax 1951 1954 - Sep lastSun 2:00 0 S -Rule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D -Rule Halifax 1956 1959 - Sep lastSun 2:00 0 S -Rule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D -Rule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D -Rule Halifax 1962 1973 - Oct lastSun 2:00 0 S +Rule Halifax 1916 only - Apr 1 0:00 1:00 D +Rule Halifax 1916 only - Oct 1 0:00 0 S +Rule Halifax 1920 only - May 9 0:00 1:00 D +Rule Halifax 1920 only - Aug 29 0:00 0 S +Rule Halifax 1921 only - May 6 0:00 1:00 D +Rule Halifax 1921 1922 - Sep 5 0:00 0 S +Rule Halifax 1922 only - Apr 30 0:00 1:00 D +Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D +Rule Halifax 1923 only - Sep 4 0:00 0 S +Rule Halifax 1924 only - Sep 15 0:00 0 S +Rule Halifax 1925 only - Sep 28 0:00 0 S +Rule Halifax 1926 only - May 16 0:00 1:00 D +Rule Halifax 1926 only - Sep 13 0:00 0 S +Rule Halifax 1927 only - May 1 0:00 1:00 D +Rule Halifax 1927 only - Sep 26 0:00 0 S +Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D +Rule Halifax 1928 only - Sep 9 0:00 0 S +Rule Halifax 1929 only - Sep 3 0:00 0 S +Rule Halifax 1930 only - Sep 15 0:00 0 S +Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S +Rule Halifax 1932 only - May 1 0:00 1:00 D +Rule Halifax 1933 only - Apr 30 0:00 1:00 D +Rule Halifax 1933 only - Oct 2 0:00 0 S +Rule Halifax 1934 only - May 20 0:00 1:00 D +Rule Halifax 1934 only - Sep 16 0:00 0 S +Rule Halifax 1935 only - Jun 2 0:00 1:00 D +Rule Halifax 1935 only - Sep 30 0:00 0 S +Rule Halifax 1936 only - Jun 1 0:00 1:00 D +Rule Halifax 1936 only - Sep 14 0:00 0 S +Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D +Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S +Rule Halifax 1939 only - May 28 0:00 1:00 D +Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D +Rule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D +Rule Halifax 1946 1949 - Sep lastSun 2:00 0 S +Rule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D +Rule Halifax 1951 1954 - Sep lastSun 2:00 0 S +Rule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D +Rule Halifax 1956 1959 - Sep lastSun 2:00 0 S +Rule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D +Rule Halifax 1962 1973 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Halifax -4:14:24 - LMT 1902 Jun 15 -4:00 Halifax A%sT 1918 @@ -1000,6 +1053,43 @@ Zone America/Glace_Bay -3:59:48 - LMT 19 -4:00 Halifax A%sT 1974 -4:00 Canada A%sT +# New Brunswick + +# From Paul Eggert (2006-01-20): +# New Brunswick's Time Definition Act +# <http://www.gnb.ca/0062/PDF-acts/t-06.pdf> says they change at 00:01, and +# <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it +# clear that this has been the case since at least 1993. +# For now, assume it started in 1993. The Office of the Premier announced +# <http://www.gnb.ca/cnb/news/pre/2005e1737pr.htm> (2005-12-23) +# that they will bring forward proposed amendments to harmonize with the US; +# for now assume that this will happen, but they'll still switch at 00:01. + +# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S +Rule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D +Rule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S +Rule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D +Rule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S +Rule Moncton 1939 only - May 27 1:00 1:00 D +Rule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S +Rule Moncton 1940 only - May 19 1:00 1:00 D +Rule Moncton 1941 only - May 4 1:00 1:00 D +Rule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D +Rule Moncton 1946 1956 - Sep lastSun 2:00 0 S +Rule Moncton 1956 1972 - Oct lastSun 2:00 0 S +Rule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D +Rule Moncton 1993 2006 - Oct lastSun 0:01 0 S +Rule Moncton 2007 max - Mar Sun>=8 0:01 1:00 D +Rule Moncton 2007 max - Nov Sun>=1 0:01 0 S +# Zone NAME GMTOFF RULES FORMAT [UNTIL] +Zone America/Moncton -4:19:08 - LMT 1883 Dec 9 + -5:00 - EST 1902 Jun 15 + -4:00 Canada A%sT 1933 + -4:00 Moncton A%sT 1942 + -4:00 Canada A%sT 1946 + -4:00 Moncton A%sT 1973 + -4:00 Canada A%sT 1993 + -4:00 Moncton A%sT # Ontario, Quebec =================================================================== RCS file: RCS/zone.tab,v retrieving revision 2005.12 retrieving revision 2005.12.0.1 diff -pu -r2005.12 -r2005.12.0.1 --- zone.tab 2005/08/22 16:05:26 2005.12 +++ zone.tab 2006/01/20 22:34:20 2005.12.0.1 @@ -100,8 +100,9 @@ BW -2545+02555 Africa/Gaborone BY +5354+02734 Europe/Minsk BZ +1730-08812 America/Belize CA +4734-05243 America/St_Johns Newfoundland Island -CA +4439-06336 America/Halifax Atlantic Time - Nova Scotia (most places), NB, W Labrador, E Quebec & PEI +CA +4439-06336 America/Halifax Atlantic Time - Nova Scotia (most places), W Labrador, E Quebec & PEI CA +4612-05957 America/Glace_Bay Atlantic Time - Nova Scotia - places that did not observe DST 1966-1971 +CA +4606-06447 America/Moncton Atlantic Time - New Brunswick CA +5320-06025 America/Goose_Bay Atlantic Time - E Labrador CA +4531-07334 America/Montreal Eastern Time - Quebec - most locations CA +4339-07923 America/Toronto Eastern Time - Ontario - most locations @@ -370,12 +371,14 @@ US +404251-0740023 America/New_York East US +421953-0830245 America/Detroit Eastern Time - Michigan - most locations US +381515-0854534 America/Kentucky/Louisville Eastern Time - Kentucky - Louisville area US +364947-0845057 America/Kentucky/Monticello Eastern Time - Kentucky - Wayne County -US +394606-0860929 America/Indiana/Indianapolis Eastern Standard Time - Indiana - most locations -US +382232-0862041 America/Indiana/Marengo Eastern Standard Time - Indiana - Crawford County -US +411745-0863730 America/Indiana/Knox Eastern Standard Time - Indiana - Starke County -US +384452-0850402 America/Indiana/Vevay Eastern Standard Time - Indiana - Switzerland County +US +394606-0860929 America/Indiana/Indianapolis Eastern Time - Indiana - most locations +US +382232-0862041 America/Indiana/Marengo Eastern Time - Indiana - Crawford County +US +411745-0863730 America/Indiana/Knox Eastern Time - Indiana - Starke County +US +384452-0850402 America/Indiana/Vevay Eastern Time - Indiana - Switzerland County US +415100-0873900 America/Chicago Central Time -US +450628-0873651 America/Menominee Central Time - Michigan - Wisconsin border +US +384038-0873143 America/Indiana/Vincennes Central Time - Indiana - Daviess, Dubois, Knox, Martin, Perry & Pulaski +US +382931-0871643 America/Indiana/Petersburg Central Time - Indiana - Pike County +US +450628-0873651 America/Menominee Central Time - Michigan - Dickinson, Gogebic, Iron & Menominee Counties US +470659-1011757 America/North_Dakota/Center Central Time - North Dakota - Oliver County US +394421-1045903 America/Denver Mountain Time US +433649-1161209 America/Boise Mountain Time - south Idaho & east Oregon =================================================================== RCS file: RCS/tz-link.htm,v retrieving revision 2005.16 retrieving revision 2005.16.0.1 diff -pu -r2005.16 -r2005.16.0.1 --- tz-link.htm 2005/11/29 19:30:51 2005.16 +++ tz-link.htm 2006/01/20 22:34:20 2005.16.0.1 @@ -9,7 +9,7 @@ <meta http-equiv="Content-type" content='text/html; charset="US-ASCII"' /> <meta name="DC.Creator" content="Eggert, Paul" /> <meta name="DC.Contributor" content="Olson, Arthur David" /> -<meta name="DC.Date" content="2005-11-17" /> +<meta name="DC.Date" content="2006-01-20" /> <meta name="DC.Description" content="Sources of information about time zones and daylight saving time" /> <meta name="DC.Identifier" content="http://www.twinsun.com/tz/tz-link.htm" /> @@ -31,7 +31,8 @@ that represent the history of local time for many representative locations around the globe. It is updated periodically to reflect changes made by political bodies to <a href="http://en.wikipedia.org/wiki/Time_zone">time zone</a> -boundaries, <a href="http://en.wikipedia.org/wiki/UTC"><abbr +boundaries, <a +href="http://en.wikipedia.org/wiki/Coordinated_Universal_Time"><abbr title="Coordinated Universal Time">UTC</abbr></a> offsets, and <a href="http://en.wikipedia.org/wiki/Daylight_saving">daylight-saving</a> rules. @@ -68,7 +69,8 @@ title="daylight saving time">DST</abbr>) <code>America/Detroit</code> represents most of Michigan, which uses eastern time but with different <abbr>DST</abbr> rules in 1975; and other entries represent smaller regions like Starke County, -Indiana, which switched from central to eastern time in 1991. +Indiana, which switched from central to eastern time in 1991 +and switched back in 2006. To use the database on an extended <a href="http://en.wikipedia.org/wiki/POSIX"><abbr title="Portable Operating System Interface">POSIX</abbr></a> @@ -141,7 +143,19 @@ title="Calendaring and Scheduling Workin covers time zone data; see its VTIMEZONE calendar component. The <a href="http://www.calconnect.org/">Calendaring and Scheduling -Consortium</a> is promoting further work in this area.</li> +Consortium</a> is promoting further work in this area. <a +href="ftp://ftp.rfc-editor.org/internet-drafts/draft-royer-ical-basic-04.txt">iCalendar +Basic</a> is a draft simplified definition that omits VTIMEZONE due to +its complexity, but this removal is expected to appear as an +independent specification later.</li> +<li><a +href="ftp://ftp.rfc-editor.org/internet-drafts/draft-royer-timezone-registry-03.t…">Time +Zone Registry</a> proposes an <a href="http://www.iana.org/"><abbr +title="Internet Assigned Numbers Authority">IANA</abbr></a> time zone +registration process that would establish unique names for each +version of each <code>tz</code> zone, along with a polygonal +representation of the geographical area corresponding to the +zone.</li> <li>The <a href="http://lists.w3.org/Archives/Public/www-rdf-calendar/">www-rdf-calendar</a> list discusses <a @@ -196,6 +210,11 @@ is freely available under a <abbr>BSD</a Zone Library</a> compiles <code>tz</code> source into <a href="http://www.python.org/">Python</a>. It is freely available under a <abbr>BSD</abbr>-style license.</li> +<li><a href="http://tzinfo.rubyforge.org/">TZInfo - Ruby Timezone Library</a> +compiles <code>tz</code> source into +<a href="http://www.ruby-lang.org/">Ruby</a>. +It is freely available under the <abbr +title="Massachusetts Institute of Technology">MIT</abbr> license.</li> </ul> <h2>Other <code>tz</code> binary file readers</h2> <ul> @@ -243,8 +262,12 @@ Microsoft Windows program.</li> <li><a href="http://www.astro.com/cgi/aq.cgi?lang=e">Atlas Query</a> is Astrodienst's Web version of Shanks's excellent time zone history atlases published in both <a -href="http://astrocom.com/products/software.php?software_id=ibmwboth">computer -and book form</a> by <a +href="http://astrocom.com/products/software.php?software_id=ibmwboth">computer</a> +and book form (<a +href="http://astrocom.com/products/book.php?book_id=b110x">one volume +for the USA</a>, and <a +href="http://astrocom.com/products/book.php?book_id=b112x">one for +other locations</a>) by <a href="http://astrocom.com/">Astro Communications Services</a>.</li> <li><a href="http://worldtime.com/">WORLDTIME: interactive atlas, time info, public holidays</a> @@ -424,7 +447,9 @@ href="http://www.cv.nrao.edu/~rfisher/Ep Times</a> explains more abstruse astronomical time scales like <abbr title="Terrestrial Dynamic Time">TDT</abbr>, <abbr title="Geocentric Coordinate Time">TCG</abbr>, and -<abbr title="Barycentric Dynamic Time">TDB</abbr>.</li> +<abbr title="Barycentric Dynamic Time">TDB</abbr>. +<a href="http://www.ucolick.org/~sla/leapsecs/timescales.html">Time +Scales</a> goes into more detail, particularly for historical variants.</li> <li>The <a href="http://www.iau.org/"><abbr title="International Astronomical Union">IAU</abbr></a>'s <a href="http://www.iau-sofa.rl.ac.uk/"><abbr @@ -444,6 +469,10 @@ describes Mars Coordinated Time (<abbr title="Mars Coordinated Time">MTC</abbr>) and the diverse local time scales used by each landed mission on Mars.</li> +<li><a href="http://www.leapsecond.com/">LeapSecond.com</a> is +dedicated not only to leap seconds but to precise time and frequency +in general. It covers the state of the art in amateur timekeeping, and +how the art has progressed over the past few decades.</li> <li><a href="http://hpiers.obspm.fr/eop-pc/products/bulletins/bulletins.html">Bulletins maintained by the @@ -467,8 +496,8 @@ title="Global Positioning System">GPS</a leap second: its history and possible future</a>, <a href="http://www.bipm.fr/metrologia/index.html">Metrologia</a> <strong>38</strong> (2001), 509–529. -<a href="http://www.ucolick.org/~sla/leapsecs/onlinebib.html">The -Future of Leap Seconds</a> catalogs information about this +<a href="http://www.ucolick.org/~sla/leapsecs/">The +Future of Leap Seconds</a> covers this contentious issue.</li> </ul> <h2>Time notation</h2> @@ -483,6 +512,10 @@ title="International Organization for St 8601:2004 -- Data elements and interchange formats -- Information interchange -- Representation of dates and times</a>.</li> <li> +<a href="http://www.w3.org/TR/xmlschema-2/#dateTime"><abbr>XML</abbr> +Schema: Datatypes - dateTime</a> specifies a format inspired by +<abbr>ISO</abbr> 8601 that is in common use in <abbr>XML</abbr> data.</li> +<li> Section 3.3 of <a href="ftp://ftp.rfc-editor.org/in-notes/rfc2822.txt">Internet <abbr title="Request For Comments">RFC</abbr> 2822</a> @@ -495,6 +528,10 @@ headers.</li> profile for use in new Internet protocols.</li> <li> +<a href="http://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://www.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>

4 9

Australia, ACT
by Brett Grace Jan. 25, 2006

Jan. 25, 2006

Daylight Savings haven't been adjusted for Canberra, ACT (Australia) to reflect the changes due to the Commonwealth Games There are very few personal problems that cannot be solved through a suitable application of high explosives.

1 0

RE: Docket No. 2005-22114
by Olson, Arthur David (NIH/NCI) [E] Jan. 24, 2006

Jan. 24, 2006

> This cannot be exactly what was intended, because 2:00 a.m. EST corresponds to 1:00 a.m. CST, at which point clocks in the Central time zone will not > spring forward for another hour. Therefore, as written, the rule requires that a clock in the affected area must jump backwards from 02:00 EST to 01:00 > CST, and then an hour later jump ahead from 02:00 CST to 03:00 CDT. In other words, the currently-required clock transitions would look like this: > > 01:59:59 EST > ... and then, one second later,... > 01:00:00 CST > ... > ... > ... and then, one hour later,... > 01:59:59 CST > ... and then, one second later,... > 03:00:00 CDT > > We doubt whether you really intended that the citizens of Vincennes, Indiana should stay up in the middle of the night and change their clocks twice. The DOT-related problem is the over-zealous railroad engineer who parks his train for an hour when the clock falls back and then runs at high speed (increasing the chance of an accident) to make up time when the clock springs forward. I will not tempt fate by putting a smiley face here. In an unrelated matter, page 57 of the docket reads (in part) "We expect the economic impact of this proposed rule to be so minimal that a full Regulatory Evaluation...is unnecessary." Which raises the question: if changing clocks by an hour has such minimal economic impact, why are we playing the DST game in the first place? --ado

6 7

RE: Docket No. 2005-22114
by Olson, Arthur David (NIH/NCI) [E] Jan. 24, 2006

Jan. 24, 2006

Recall that a message sent to the time zone mailing list isn't automatically forwarded unless it's from someone on the list (this is an anti-spam measure). I typically run through the raw feed each Monday and forward any relevant stuff from non-list senders. Since Paul sent the message to Judith S. Kaleta I've been checking on a daily basis; there's been nothing sent to the list yet. If we could just get Jon Stewart to "cover" the "story"... --ado -----Original Message----- From: Paul Eggert [mailto:eggert@cs.ucla.edu] Sent: Monday, January 23, 2006 7:00 PM To: tz(a)lecserver.nci.nih.gov Subject: Re: Docket No. 2005-22114 "Bill Bonnett" <news(a)abdicate.net> writes: > Has anyone bothered to contact DOT about this? Yes, I emailed Judith S. Kaleta, of the Office of the General Counsel of the DOT, and CC'ed to this list. No response yet.

1 0

FW: Re: Docket No. 2005-22114
by Arthur David Olson Jan. 24, 2006

Jan. 24, 2006

Rodrigo Severo is not on the time zone list at the address shown below; direct replies appropriately. --ado >From rsevero.lists(a)gmail.com Tue Jan 24 06:04:34 2006 ... From: Rodrigo Severo <rodrigo.lists(a)fabricadeideias.com> Sender: rsevero.lists(a)gmail.com ... On 1/23/06, Paul Eggert <eggert(a)cs.ucla.edu> wrote: > > "David Braverman" <david(a)inner-drive.com> writes: > > It is a bit ironic that the US is less efficient than Brazil in fixing > obviously-broken regulations like this. I'm sorry but I have to ask: where is the irony in this? I hope the answer isn't obvious to people from US and I'm not seeing it just because I'm brazilian ;) Rodrigo Severo

1 0

RE: off-by-one-hour error in OST Docket No. 2005-22114
by Paul Schauble Jan. 23, 2006

Jan. 23, 2006

Doesn't the first proposal have the problem that there is no 2:59:59 EST, the Eastern zone having changed to DST? ++PLS -----Original Message----- From: tz-request(a)elsie.nci.nih.gov [mailto:tz-request@elsie.nci.nih.gov] On Behalf Of Paul Eggert Sent: Friday, January 20, 2006 10:56 PM To: Judith S. Kaleta Cc: Time zone mailing list Subject: off-by-one-hour error in OST Docket No. 2005-22114 Judith S. Kaleta Office of the General Counsel US Dept. of Transportation Room 10428 400 Seventh St Washington, DC 20590 Dear Ms. Kaleta: I help maintain the public-domain tz database of time zone and daylight saving time transitions. This database contains code and data that represent the history of local time, and is used by many computers around the world. For details, please see <http://www.twinsun.com/tz/tz-link.htm>. Needless to say, we've been following the Indiana situation with interest. Deborah Goldsmith of Apple Computer, one of our correspondents, recently noted what appears to be a one-hour error in docket OST-2005-22114 <http://dmses.dot.gov/docimages/pdf95/382329_web.pdf>. Quoting from the first page of that document: DATES: The effective date of this rule is 2:00 a.m. EST Sunday, April 2, 2006, which is the changeover date from standard time to Daylight Saving Time. This cannot be exactly what was intended, because 2:00 a.m. EST corresponds to 1:00 a.m. CST, at which point clocks in the Central time zone will not spring forward for another hour. Therefore, as written, the rule requires that a clock in the affected area must jump backwards from 02:00 EST to 01:00 CST, and then an hour later jump ahead from 02:00 CST to 03:00 CDT. In other words, the currently-required clock transitions would look like this: 01:59:59 EST ... and then, one second later,... 01:00:00 CST ... ... ... and then, one hour later,... 01:59:59 CST ... and then, one second later,... 03:00:00 CDT We doubt whether you really intended that the citizens of Vincennes, Indiana should stay up in the middle of the night and change their clocks twice. Our correspondents have suggested two different ways out of this problem. First, and perhaps simplest, you could change the effective time of the rule from 2:00 a.m. EST to 3:00 a.m. EST. This will result in the following transition: 02:59:59 EST ... and then, one second later,... 03:00:00 CDT Second, if you prefer sticking to a 2:00 a.m. transition, you could append the following sentences: Counties that move from the Eastern to the Central Time Zone will switch directly from EST to CDT, so that their clocks need not change. From 2:00 a.m. CDT to 3:00 a.m. CDT these clocks will use CDT even though the rest of the Central Time Zone will still be using CST. This would result in the following transition: 01:59:59 EST ... and then, one second later,... 02:00:00 CDT Please let us know which solution (if any) you prefer, by writing to us in the time zone mailing list <tz(a)elsie.nci.nih.gov>. Thanks. Sincerely, Paul Eggert Computer Science Dept. 4532J Boelter Hall University of California Los Angeles, CA 90095-1596 +1 310 267 2254 (voice) eggert(a)ucla.edu (email)

2 1

RE: off-by-one-hour error in OST Docket No. 2005-22114
by Andy Lipscomb Jan. 23, 2006

Jan. 23, 2006

PLS> Doesn't the first proposal have the problem that there is no 2:59:59 EST, the Eastern zone having changed to DST? It really just requires the same caveat as the second one--that they will be on EST even with the rest of the Eastern zone having adopted EDT, for that one hour. [snipping down to the proposals...] Our correspondents have suggested two different ways out of this problem. First, and perhaps simplest, you could change the effective time of the rule from 2:00 a.m. EST to 3:00 a.m. EST. This will result in the following transition: 02:59:59 EST ... and then, one second later,... 03:00:00 CDT Second, if you prefer sticking to a 2:00 a.m. transition, you could append the following sentences: Counties that move from the Eastern to the Central Time Zone will switch directly from EST to CDT, so that their clocks need not change. From 2:00 a.m. CDT to 3:00 a.m. CDT these clocks will use CDT even though the rest of the Central Time Zone will still be using CST. This would result in the following transition: 01:59:59 EST ... and then, one second later,... 02:00:00 CDT

1 0

RE: FW: Indiana time zones
by Andy Lipscomb Jan. 23, 2006

Jan. 23, 2006

"First, Shanks says Vincennes and Indianapolis differed in many ways before 1964. For example, he says Vincennes observed DST in 1946 and from 1956 through 1963. I assume you merely copied Indianpolis's table to Vincennes for time stamps until now, which wouldn't be quite right." Correct. I bow to your superior research on that point. Second: "> In addition to the section above, the new zone will need to be added > to the zone.tab file. Vincennes' location is > +384042-0873058. My proposed patch had +384038-0873143 which is fairly close. (The LMT figures also diverged, presumably because of the coordinate difference.) My latitude and longitude are from Shanks." My figures come from the Census Bureau (with LMT computed from them, so that probably does explain the difference). "I'm not sure how Shanks (or anyone else) decides where Vincennes "is", given that one arc second of latitude is only 31 meters or so." The Census Bureau indicates that its figures are based on the approximate geographic center of the area, provided that point is actually in the area.

1 0

FW: Indiana time zones
by Olson, Arthur David (NIH/NCI) [E] Jan. 23, 2006

Jan. 23, 2006

Andy Lipscomb has been added to the time zone mailing list; this message predates the addition. --ado -----Original Message----- From: Andy Lipscomb [mailto:AndyLipscomb@decosimo.com] Sent: Friday, January 20, 2006 12:39 PM To: tz(a)lecserver.nci.nih.gov Cc: ewwa(a)chattanooga.net Subject: Indiana time zones Actually, there are seven other counties that are moving from Eastern to Central time. Since they, like Starke County, do so at the time change, they will simply skip the spring-forward--2:00 EST and 2:00 CDT are identical (both equal 21:00 UTC on the previous day). It appears to me that this requires creating a new zone for the other seven counties, which I show below. # From J. Andrew Lipscomb (2006-01-20): # Department of Transportation ruling http://www.dot.gov/affairs/dot0406.htm # adds eight new counties to the Central (America/Chicago) zone. Six are in # the Evansville area, two near Chicago. One of them (Starke) already has its # own entry; as for the other seven, the largest city in them (and an old # territorial capital) is Vincennes. I suggest that for the exemplar city of # the seven counties. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Indiana/Vincennes -5:50:04 - LMT 1883 Nov 18 12:09:56 -6:00 US C%sT 1920 -6:00 Indianapolis C%sT 1942 -6:00 US C%sT 1946 -6:00 Indianapolis C%sT 1955 Apr 24 2:00 -5:00 - EST 1957 Sep 29 2:00 -6:00 - CST 1958 Apr 27 2:00 -5:00 - EST 1969 -5:00 US E%sT 1971 -5:00 - EST 2006 Apr 2 2:00 -6:00 US C%sT In addition to the section above, the new zone will need to be added to the zone.tab file. Vincennes' location is +384042-0873058. And to cover Starke County: # From J. Andrew Lipscomb (2006-01-20): # The Department of Transportation placed Starke County back on Central time, # beginning at the 2006 DST start. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule Starke 1947 1961 - Apr lastSun 2:00 1:00 D Rule Starke 1947 1954 - Sep lastSun 2:00 0 S Rule Starke 1955 1956 - Oct lastSun 2:00 0 S Rule Starke 1957 1958 - Sep lastSun 2:00 0 S Rule Starke 1959 1961 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30 -6:00 US C%sT 1947 -6:00 Starke C%sT 1962 Apr 29 2:00 -5:00 - EST 1963 Oct 27 2:00 -6:00 US C%sT 1991 Oct 27 2:00 -5:00 - EST 2006 Apr 2 2:00 -6:00 US C%sT

2 1

Re: proposed tz patches for Indiana, New Brunswick, Gaza, etc.
by Arthur David Olson Jan. 22, 2006

Jan. 22, 2006

> I vaguely recall that it's because zic recognizes this situation > specially, and refuses to create the two hour-apart transitions that > the rules would require if applied strictly. Instead, it merges the > transitions in the common-sense way. A hunt in the archives shows that Paul's vague recollection is correct. Historically there have been places that went through the same transition that's about to happen in Knox; these places have done it without changing their wall clocks. Zic is set up to recognize the situation and "do the right thing;" given DOT's docket, the right way may not be DOT's way. For those on deadlines: to get DOT-mandated behavior, one ugly possibility is to lie by a second: instead of having a Zone such as... Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30 ... -5:00 - EST 2006 Apr 2 2 -6:00 US C%sT ...you'd have a zone such as... Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30 ... -5:00 - EST 2006 Apr 2 1:59:59 -6:00 US C%sT Matters at hand are to reconsider zic's change-collapsing behavior, document the change-collapsing behavior if it's kept, and--if DOT-mandated behavior is desired--figure out the best way to get that behavior out of the change-collapsing zics already out in the field. Below find excerpts from three relevant messages from 1996. --ado =============================================================================== > From eggert(a)twinsun.com Wed May 1 18:40:19 1996 > Return-Path: <eggert(a)twinsun.com> > Received: from alcor.twinsun.com by elsie.nci.nih.gov (4.1/SMI-4.1) > id AA26147; Wed, 1 May 96 18:40:19 EDT > Received: from der.twinsun.com (der.twinsun.com [192.54.239.42]) by alcor.twinsun.com (8.6.12/8.6.5) with ESMTP id PAA02100 for <tz(a)elsie.nci.nih.gov>; Wed, 1 May 1996 15:35:54 -0700 > Received: from bird.twinsun.com by der.twinsun.com (SMI-8.6/SMI-SVR4) > id PAA17702; Wed, 1 May 1996 15:40:05 -0700 > Received: by bird.twinsun.com (SMI-8.6/SMI-SVR4) > id PAA11877; Wed, 1 May 1996 15:40:04 -0700 > Date: Wed, 1 May 1996 15:40:04 -0700 > Message-Id: <199605012240.PAA11877(a)bird.twinsun.com> > From: Paul Eggert <eggert(a)twinsun.com> > To: tz(a)elsie.nci.nih.gov > Subject: bug in zic for Rule and Zone changing simultaneously? > Status: RO > > I found 23 bugs in the latest tz database. I enclose two detailed > examples below, and a brief summary of all the bugs. It appears that > zic has problems when applying Zone and Rule changes simultaneously. > > > Example 1. The edited input is: > > # Rule NAME FROM TO TYPE IN ON AT SAVE LET > Rule Falk 1985 max - Sep Sun>=9 0:00 1:00 D > # Zone NAME GMTOFF RULES FORMAT [UNTIL] > Zone Atlantic/Stanley -3:00 Falk E%sT 1985 Sep 15 > -4:00 Falk A%sT > > The zdump -v output is: > > Atlantic/Stanley Sun Sep 15 02:59:59 1985 GMT = Sat Sep 14 23:59:59 1985 EST isdst=0 > Atlantic/Stanley Sun Sep 15 03:00:00 1985 GMT = Sat Sep 14 23:00:00 1985 AST isdst=0 > Atlantic/Stanley Sun Sep 15 03:59:59 1985 GMT = Sat Sep 14 23:59:59 1985 AST isdst=0 > Atlantic/Stanley Sun Sep 15 04:00:00 1985 GMT = Sun Sep 15 01:00:00 1985 ADT isdst=1 > > zdump claims that inhabitants of Stanley changed their clocks twice > that night, when they changed them only once. The transition should > have been from > 1985-09-14 23:59:59 -0300 (EST) to > 1985-09-15 00:00:00 -0400 (ADT), but zic applied `Zone' first, yielding > 1985-09-14 23:00:00 -0200 (EDT), and then one hour later applied `Rule', > yielding the proper time afterwards; but there's a one-hour period of > incorrect times. > > > Example 2. The input is: > > # Rule NAME FROM TO TYPE IN ON AT SAVE LET > Rule Regina 1905 only - Sep 1 0:00 0 S > # Zone NAME GMTOFF RULES FORMAT [UNTIL] > Zone America/Regina -6:58:36 - LMT 1905 Sep > -7:00 Regina M%sT 1966 Apr 15 > > The zdump output is: > > America/Regina Fri Sep 1 06:58:35 1905 GMT = Thu Aug 31 23:59:59 1905 LMT isdst=0 > America/Regina Fri Sep 1 06:58:36 1905 GMT = Thu Aug 31 23:58:36 1905 LMT isdst=0 > America/Regina Fri Sep 1 06:59:59 1905 GMT = Thu Aug 31 23:59:59 1905 LMT isdst=0 > America/Regina Fri Sep 1 07:00:00 1905 GMT = Fri Sep 1 00:00:00 1905 MST isdst=0 > > Again, there are two transitions where there should be one, and it's > because the Zone was applied before the Rule, when they were meant to > be applied simultaneously. In this case, the erroneous period is only > 84 seconds long. > > > Here is a list of the 23 bugs I found. Each line has the following > columns: > > timezone name > first time_t value in the erroneous period (1) > first time_t value after the erroneous period is over (2) > ctime applied to (1) > ctime applied to (2) > > America/Asuncion 134017200 134020800 Sun Mar 31 23:00:00 1974 Mon Apr 1 00:00:00 1974 > America/Barbados -1199217720 -1199217600 Thu Dec 31 23:58:00 1931 Fri Jan 1 00:00:00 1932 > America/Belize -1822500432 -1822500000 Sun Mar 31 23:52:48 1912 Mon Apr 1 00:00:00 1912 > America/Costa_Rica -1545071040 -1545069600 Fri Jan 14 23:36:00 1921 Sat Jan 15 00:00:00 1921 > America/El_Salvador -1546279392 -1546279200 Fri Dec 31 23:56:48 1920 Sat Jan 1 00:00:00 1921 > America/Juneau 436352400 436356000 Sun Oct 30 01:00:00 1983 Sun Oct 30 01:00:00 1983 > ... =============================================================================== > From ado Tue May 14 14:31:50 1996 > Return-Path: <ado> > Received: by elsie.nci.nih.gov (4.1/SMI-4.1) > id AA07673; Tue, 14 May 96 14:31:50 EDT > Date: Tue, 14 May 96 14:31:50 EDT > From: ado (Arthur David Olson) > Message-Id: <9605141831.AA07673(a)elsie.nci.nih.gov> > To: tz > Subject: Simultaneous zone and DST changes > Status: RO > > The basic challenge with places such as Stanley (where a time-zone shift and > a DST change were done at the same instant in 1985, resulting in no change of > wall clock time) is that there's an hour when such a place is neither fish nor > fowl. Here's a table summarizing what's happening on September 14/15 1995 > in five different circumstances; each row of the table gives data for a > particular instant in time. The circumstances: > 1. What's happening in places that run on GMT > 2. What's happening in (hypothetical) places that always run on EST/EDT > using Falkland rules > 3. What's happening in (hypothetical) places that always run on AST/ADT > using Falkland rules > 4. What zdump tells us is currently produced by zic for Stanley > 5. And what we (presumably) really want for Stanley. > =============================================================================== > GMT-------|Always-ExT-----|Always-AxT-----|Stanley (now)--|Stanley (wanted) > 15 2:59:59|14 23:59:59 EST|14 22:59:59 AST|14 23:59:59 EST|14 23:59:59 EST > 15 3:00:00|15 01:00:00 EDT|14 23:00:00 AST|14 23:00:00 AST|15 00:00:00 ADT/EST > 15 3:59:59|15 01:59:59 EDT|14 23:59:59 AST|14 23:59:59 AST|15 00:59:59 ADT/EST > 15 4:00:00|15 02:00:00 EDT|15 01:00:00 ADT|15 01:00:00 ADT|15 01:00:00 ADT > =============================================================================== > The "Stanley (wanted)" stuff matches neither the "Always ExT" stuff nor the > "Always AxT" stuff (regardless of whether you pick ADT or EST for Stanley to > use as a time zone abbreviation during the strange hour). > > Among the ways to get from "Stanley (now)" to "Stanley (wanted)": > > 1. Hard code the transition hour--that is, where there are now lines that read... > > Zone Atlantic/Stanley -3:51:24 - LMT 1890 > -3:51 - SMT 1912 Mar 12 > -4:00 Falk A%sT 1983 May > -3:00 Falk E%sT 1985 Sep 15 > -4:00 Falk A%sT > > ...add a line to cover the hour in 1985... > > Zone Atlantic/Stanley -3:51:24 - LMT 1890 > -3:51 - SMT 1912 Mar 12 > -4:00 Falk A%sT 1983 May > -3:00 Falk E%sT 1985 Sep 15 > -3:00 - EST 1985 Sep 15 1:00 # <<<< > -4:00 Falk A%sT > > 2. Set up zic to notice situations such as the above and "do the right thing." > This would involve a code change something like this (with the "horrid > special case" check perhaps made more strict): > =============================================================================== > ... > =============================================================================== > I lean toward the second approach; are there any better ideas out there? > > --ado =============================================================================== > From eggert(a)twinsun.com Wed May 15 03:55:30 1996 > Return-Path: <eggert(a)twinsun.com> > Received: from alcor.twinsun.com by elsie.nci.nih.gov (4.1/SMI-4.1) > id AA10516; Wed, 15 May 96 03:55:30 EDT > Received: from der.twinsun.com (der.twinsun.com [192.54.239.42]) by alcor.twinsun.com (8.6.12/8.6.5) with ESMTP id AAA03404; Wed, 15 May 1996 00:49:16 -0700 > Received: from bird.twinsun.com by der.twinsun.com (SMI-8.6/SMI-SVR4) > id AAA19194; Wed, 15 May 1996 00:55:12 -0700 > Received: by bird.twinsun.com (SMI-8.6/SMI-SVR4) > id AAA01768; Wed, 15 May 1996 00:55:11 -0700 > Date: Wed, 15 May 1996 00:55:11 -0700 > Message-Id: <199605150755.AAA01768(a)bird.twinsun.com> > From: Paul Eggert <eggert(a)twinsun.com> > To: ado(a)elsie.nci.nih.gov > Cc: tz(a)elsie.nci.nih.gov > In-Reply-To: <9605141831.AA07673(a)elsie.nci.nih.gov> (ado(a)elsie.nci.nih.gov) > Subject: Re: Simultaneous zone and DST changes > Status: RO > > Date: Tue, 14 May 96 14:31:50 EDT > From: ado(a)elsie.nci.nih.gov (Arthur David Olson) > > I lean toward the second approach; are there any better ideas out there? > > How about the following implementation of the 2nd approach instead? > It's the same basic idea, except that the two transitions are merged > if their before-transition localtimes are the same (or if the latter > precedes the former!). This should avoid the horridness of the 1-hour > special case. > > This patch fixes bugs in the following transitions: > > 1919-03-01 Europe/Brussels > 1973-04-29 America/Menominee > 1983-10-30 America/Juneau > 1985-04-19 Asia/Istanbul > 1985-09-15 Atlantic/Stanley > > =================================================================== > RCS file: RCS/zic.c,v > retrieving revision 1996.6 > retrieving revision 1996.6.1.2 > diff -c -r1996.6 -r1996.6.1.2 > *** zic.c 1996/05/03 02:49:23 1996.6 > --- zic.c 1996/05/15 07:51:50 1996.6.1.2 > *************** > *** 1397,1406 **** > if (isdsts[0] == 0) > while (attypes[fromi].type == 0) > ++fromi; /* handled by default rule */ > ! for ( ; fromi < timecnt; ++fromi) > if (toi == 0 || > attypes[toi - 1].type != attypes[fromi].type) > attypes[toi++] = attypes[fromi]; > timecnt = toi; > } > /* > --- 1397,1416 ---- > if (isdsts[0] == 0) > while (attypes[fromi].type == 0) > ++fromi; /* handled by default rule */ > ! for ( ; fromi < timecnt; ++fromi) { > ! if (toi != 0 > ! && ((attypes[fromi].at > ! + gmtoffs[attypes[toi - 1].type]) > ! <= (attypes[toi - 1].at > ! + gmtoffs[toi == 1 ? 0 > ! : attypes[toi - 2].type]))) { > ! attypes[toi - 1].type = attypes[fromi].type; > ! continue; > ! } > if (toi == 0 || > attypes[toi - 1].type != attypes[fromi].type) > attypes[toi++] = attypes[fromi]; > + } > timecnt = toi; > } > /*

1 0

off-by-one-hour error in OST Docket No. 2005-22114
by Paul Eggert Jan. 21, 2006

Jan. 21, 2006

Judith S. Kaleta Office of the General Counsel US Dept. of Transportation Room 10428 400 Seventh St Washington, DC 20590 Dear Ms. Kaleta: I help maintain the public-domain tz database of time zone and daylight saving time transitions. This database contains code and data that represent the history of local time, and is used by many computers around the world. For details, please see <http://www.twinsun.com/tz/tz-link.htm>. Needless to say, we've been following the Indiana situation with interest. Deborah Goldsmith of Apple Computer, one of our correspondents, recently noted what appears to be a one-hour error in docket OST-2005-22114 <http://dmses.dot.gov/docimages/pdf95/382329_web.pdf>. Quoting from the first page of that document: DATES: The effective date of this rule is 2:00 a.m. EST Sunday, April 2, 2006, which is the changeover date from standard time to Daylight Saving Time. This cannot be exactly what was intended, because 2:00 a.m. EST corresponds to 1:00 a.m. CST, at which point clocks in the Central time zone will not spring forward for another hour. Therefore, as written, the rule requires that a clock in the affected area must jump backwards from 02:00 EST to 01:00 CST, and then an hour later jump ahead from 02:00 CST to 03:00 CDT. In other words, the currently-required clock transitions would look like this: 01:59:59 EST ... and then, one second later,... 01:00:00 CST ... ... ... and then, one hour later,... 01:59:59 CST ... and then, one second later,... 03:00:00 CDT We doubt whether you really intended that the citizens of Vincennes, Indiana should stay up in the middle of the night and change their clocks twice. Our correspondents have suggested two different ways out of this problem. First, and perhaps simplest, you could change the effective time of the rule from 2:00 a.m. EST to 3:00 a.m. EST. This will result in the following transition: 02:59:59 EST ... and then, one second later,... 03:00:00 CDT Second, if you prefer sticking to a 2:00 a.m. transition, you could append the following sentences: Counties that move from the Eastern to the Central Time Zone will switch directly from EST to CDT, so that their clocks need not change. From 2:00 a.m. CDT to 3:00 a.m. CDT these clocks will use CDT even though the rest of the Central Time Zone will still be using CST. This would result in the following transition: 01:59:59 EST ... and then, one second later,... 02:00:00 CDT Please let us know which solution (if any) you prefer, by writing to us in the time zone mailing list <tz(a)elsie.nci.nih.gov>. Thanks. Sincerely, Paul Eggert Computer Science Dept. 4532J Boelter Hall University of California Los Angeles, CA 90095-1596 +1 310 267 2254 (voice) eggert(a)ucla.edu (email)

1 0

RE: proposed tz patches for Indiana, New Brunswick, Gaza, etc.
by Paul Schauble Jan. 21, 2006

Jan. 21, 2006

I am inclined to think you should implement the letter of the law rather than guessing what DOT "really" meant. Either that or ask DOT for clarification. I hate to say it, but I've been involved in similar things that became a legal issue and the difference can matter. Unfortunately, this conflicts with the deadline. Maybe I'm a bit paranoid, but I'd ask. ++PLS -----Original Message----- From: tz-request(a)elsie.nci.nih.gov [mailto:tz-request@elsie.nci.nih.gov] On Behalf Of Deborah Goldsmith Sent: Friday, January 20, 2006 7:08 PM To: tz(a)lecserver.nci.nih.gov Subject: Re: proposed tz patches for Indiana, New Brunswick, Gaza, etc. On Jan 20, 2006, at 2:59 PM, Paul Eggert wrote: > + -5:00 - EST 2006 Apr 2 2:00 > + -6:00 US C%sT For all the Indiana counties that are switching from ET to CT, shouldn't this be: + -5:00 - EST 2006 Apr 2 2:00 + -5:00 - CDT 2006 Apr 2 3:00 + -6:00 US C%sT so that the time will proceed smoothly from 1:59:59 AM EST to 2:00:00 AM CDT, as proposed by Paul Eggert? With the rules the way they are now, the time will go from 1:59:59 AM EST to 1:00:00 AM CST, then from 1:59:59 AM CST to 3:00:00 AM CDT. Personally, I'm fine either way. Deborah

2 1

RE: DOT issues final ruling on Indiana time zones
by Paul Schauble Jan. 20, 2006

Jan. 20, 2006

Probably I'm missing something, but why "2:00 AM CST to 1:00 AM CDT". In the spring, 1:59:59 is followed 1 second later by 3:00:00 CDT. I don't understand why you have it in the other direction. ++PLS -----Original Message----- From: tz-request(a)elsie.nci.nih.gov [mailto:tz-request@elsie.nci.nih.gov] On Behalf Of Deborah Goldsmith Sent: Wednesday, January 18, 2006 7:12 PM To: tz(a)lecserver.nci.nih.gov Subject: Re: DOT issues final ruling on Indiana time zones You're right, that should have been "fall back from 2:00 AM EST to 1:00 AM CST, then again from 2:00 AM CST to 1:00 AM CDT". Sorry about that. From the final DOT ruling (posted earlier) it appears as though that is in fact the correct behavior, too, as odd as it is. Deborah On Jan 18, 2006, at 5:38 PM, Paul Schauble wrote: > Since this is in the spring, shouldn't that last change be from 2AM > CST to 3AM CDT? > > ++PLS > > -----Original Message----- > From: tz-request(a)elsie.nci.nih.gov [mailto:tz- > request(a)elsie.nci.nih.gov] On Behalf Of Deborah Goldsmith > Sent: Wednesday, January 18, 2006 5:38 PM > To: tz(a)lecserver.nci.nih.gov > Subject: DOT issues final ruling on Indiana time zones > > <snip> > assuming I'm interpreting everything correctly. The DOT doesn't > specify whether Starke county switch to Central Time at the > appropriate time for its old or new time zone, but I'm assuming the > old here. That leads to it falling back from 2:00AM EST to 1:00AM CST, > and then again from 2:00AM CST to 1:00AM CST. If that makes people > nervous, then the transition would need to be at 3:00 AM. > > Deborah Goldsmith > Internationalization, Unicode liaison > Apple Computer, Inc. > goldsmit(a)apple.com >

6 7

Indiana time zones
by Andy Lipscomb Jan. 20, 2006

Jan. 20, 2006

Actually, there are seven other counties that are moving from Eastern to Central time. Since they, like Starke County, do so at the time change, they will simply skip the spring-forward--2:00 EST and 2:00 CDT are identical (both equal 21:00 UTC on the previous day). It appears to me that this requires creating a new zone for the other seven counties, which I show below. # From J. Andrew Lipscomb (2006-01-20): # Department of Transportation ruling http://www.dot.gov/affairs/dot0406.htm # adds eight new counties to the Central (America/Chicago) zone. Six are in # the Evansville area, two near Chicago. One of them (Starke) already has its # own entry; as for the other seven, the largest city in them (and an old # territorial capital) is Vincennes. I suggest that for the exemplar city of # the seven counties. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Indiana/Vincennes -5:50:04 - LMT 1883 Nov 18 12:09:56 -6:00 US C%sT 1920 -6:00 Indianapolis C%sT 1942 -6:00 US C%sT 1946 -6:00 Indianapolis C%sT 1955 Apr 24 2:00 -5:00 - EST 1957 Sep 29 2:00 -6:00 - CST 1958 Apr 27 2:00 -5:00 - EST 1969 -5:00 US E%sT 1971 -5:00 - EST 2006 Apr 2 2:00 -6:00 US C%sT In addition to the section above, the new zone will need to be added to the zone.tab file. Vincennes' location is +384042-0873058. And to cover Starke County: # From J. Andrew Lipscomb (2006-01-20): # The Department of Transportation placed Starke County back on Central time, # beginning at the 2006 DST start. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule Starke 1947 1961 - Apr lastSun 2:00 1:00 D Rule Starke 1947 1954 - Sep lastSun 2:00 0 S Rule Starke 1955 1956 - Oct lastSun 2:00 0 S Rule Starke 1957 1958 - Sep lastSun 2:00 0 S Rule Starke 1959 1961 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30 -6:00 US C%sT 1947 -6:00 Starke C%sT 1962 Apr 29 2:00 -5:00 - EST 1963 Oct 27 2:00 -6:00 US C%sT 1991 Oct 27 2:00 -5:00 - EST 2006 Apr 2 2:00 -6:00 US C%sT

1 0

DOT issues final ruling on Indiana time zones
by Deborah Goldsmith Jan. 19, 2006

Jan. 19, 2006

The DOT final ruling on Indiana came out today: http://www.dot.gov/affairs/dot0406.htm Based on my reading of this document, only one zone in tzdata is affected, America/Indiana/Knox. That zone will start observing US Central Time starting April 2, 2006, at the time of the switchover to Daylight Savings Time. Probably the easiest thing to do is to change the last two lines as follows: From: -5:00 - EST 2006 -5:00 US E%sT to: -5:00 - EST 2006 Apr 2 2:00 -5:00 US C%sT assuming I'm interpreting everything correctly. The DOT doesn't specify whether Starke county switch to Central Time at the appropriate time for its old or new time zone, but I'm assuming the old here. That leads to it falling back from 2:00AM EST to 1:00AM CST, and then again from 2:00AM CST to 1:00AM CST. If that makes people nervous, then the transition would need to be at 3:00 AM. Deborah Goldsmith Internationalization, Unicode liaison Apple Computer, Inc. goldsmit(a)apple.com

2 2

latest proposed 64-bit changes
by Arthur David Olson Jan. 19, 2006

Jan. 19, 2006

Here's the latest version of proposed changes to the time zone package to cope with 64-bit time values. As usual, these are differences from the stuff that's available at ftp://elsie.nci.nih.gov/pub/tz{code,data}2005r.tar.gz. I ran the package before and after these changes through the zgress wringer that I sent out on Tuesday; here on elsie (a 32-bit system) I get the same results from a zdump of all the binary data files whether I use the before or after zdump and whether I use the before or after data files. For those who missed earlier rounds: the "new" version of zic generates a three-part binary file; the file starts off with "Tzif2" (rather than the old "Tzif\0"). The first part (other than the change in the magic "Tzif" string) is identical in format to the existing time zone binary files. The second part has the same format except that 64 bits are stored for each time value (rather than the old 32 bits). The third part is a newline-enclosed POSIX-format time zone string (such as "EST5EDT,M3.2.0,M11.1.0") if the future of the zone can be represented with such a string, or a newline-enclosed null string otherwise. If a zone's future can't be represented by a POSIX string, the new zic generates 400 years worth of 64-bit time transition information; the stuff in "localtime.c" sees if there's 400 years worth of regularity at the end of the data and, if so, does its work modulo 400 to extend the data into the very far future. Given the magnitude of these changes I'll wait a while for feedback; since these changes have already been around the block a couple of times and since they pass the regression test, I won't wait too long. Absent negative feedback, expect the changes to show up in the ftp version on Presidents' Day (2006-02-20). The changes below also reflect Roland McGrath's scheck suggestions. --ado *** tzftp/tzfile.5 Thu Dec 22 09:31:16 2005 --- tzexp3/tzfile.5 Tue Jan 17 14:42:56 2006 *************** *** 9,15 **** .IR tzset (3) begin with the magic characters "TZif" to identify then as time zone information files, ! followed by sixteen bytes reserved for future use, followed by six four-byte values of type .BR long , written in a ``standard'' byte order --- 9,17 ---- .IR tzset (3) begin with the magic characters "TZif" to identify then as time zone information files, ! followed by a character identifying the version of the file's format ! (as of 2005, either an ASCII NUL or a '2') ! followed by fifteen bytes containing zeroes reserved for future use, followed by six four-byte values of type .BR long , written in a ``standard'' byte order *************** *** 131,138 **** .I tzh_timecnt is zero or the time argument is less than the first transition time recorded in the file. .SH SEE ALSO newctime(3) ! .\" @(#)tzfile.5 7.12 .\" This file is in the public domain, so clarified as of .\" 1996-06-05 by Arthur David Olson. --- 133,150 ---- .I tzh_timecnt is zero or the time argument is less than the first transition time recorded in the file. + .PP + For version-2-format time zone files, + the above header and data is followed by a second header and data, + identical in format except that + eight bytes are used for each transition time or leap second time. + After the second header and data comes a newline-encloded, + POSIX-TZ-environment-variable-style string for use in handling instants + after the last transition time stored in the file + (with nothing between the newlines if there is no POSIX representation for + such instants). .SH SEE ALSO newctime(3) ! .\" @(#)tzfile.5 7.13 .\" This file is in the public domain, so clarified as of .\" 1996-06-05 by Arthur David Olson. *** tzftp/Makefile Thu Dec 22 09:31:13 2005 --- tzexp3/Makefile Tue Jan 17 14:42:54 2006 *************** *** 1,4 **** ! # @(#)Makefile 7.109 # Change the line below for your time zone (after finding the zone you want in # the time zone files, or adding it to a time zone file). --- 1,4 ---- ! # @(#)Makefile 7.110 # Change the line below for your time zone (after finding the zone you want in # the time zone files, or adding it to a time zone file). *************** *** 95,100 **** --- 95,101 ---- # -DHAVE_SETTIMEOFDAY=1 if settimeofday has just 1 arg (SVR4) # -DHAVE_SETTIMEOFDAY=2 if settimeofday uses 2nd arg (4.3BSD) # -DHAVE_SETTIMEOFDAY=3 if settimeofday ignores 2nd arg (4.4BSD) + # -DHAVE_STDINT_H=1 if you have a pre-C99 compiler with "stdint.h" # -DHAVE_STRERROR=0 if your system lacks the strerror function # -DHAVE_SYMLINK=0 if your system lacks the symlink function # -DHAVE_SYS_STAT_H=0 if your compiler lacks a "sys/stat.h" *** tzftp/tzfile.h Thu Dec 22 09:31:16 2005 --- tzexp3/tzfile.h Tue Jan 17 15:05:09 2006 *************** *** 21,27 **** #ifndef lint #ifndef NOID ! static char tzfilehid[] = "@(#)tzfile.h 7.18"; #endif /* !defined NOID */ #endif /* !defined lint */ --- 21,27 ---- #ifndef lint #ifndef NOID ! static char tzfilehid[] = "@(#)tzfile.h 7.19"; #endif /* !defined NOID */ #endif /* !defined lint */ *************** *** 49,55 **** struct tzhead { char tzh_magic[4]; /* TZ_MAGIC */ ! char tzh_reserved[16]; /* reserved for future use */ char tzh_ttisgmtcnt[4]; /* coded number of trans. time flags */ char tzh_ttisstdcnt[4]; /* coded number of trans. time flags */ char tzh_leapcnt[4]; /* coded number of leap seconds */ --- 49,56 ---- struct tzhead { char tzh_magic[4]; /* TZ_MAGIC */ ! char tzh_version[1]; /* '\0' or '2' as of 2005 */ ! char tzh_reserved[15]; /* reserved--must be zero */ char tzh_ttisgmtcnt[4]; /* coded number of trans. time flags */ char tzh_ttisstdcnt[4]; /* coded number of trans. time flags */ char tzh_leapcnt[4]; /* coded number of leap seconds */ *************** *** 84,101 **** */ /* ** In the current implementation, "tzset()" refuses to deal with files that ** exceed any of the limits below. */ #ifndef TZ_MAX_TIMES ! /* ! ** The TZ_MAX_TIMES value below is enough to handle a bit more than a ! ** year's worth of solar time (corrected daily to the nearest second) or ! ** 138 years of Pacific Presidential Election time ! ** (where there are three time zone transitions every fourth year). ! */ ! #define TZ_MAX_TIMES 370 #endif /* !defined TZ_MAX_TIMES */ #ifndef TZ_MAX_TYPES --- 85,106 ---- */ /* + ** If tzh_version is '2' or greater, the above is followed by a second instance + ** of tzhead and a second instance of the data in which each coded transition + ** time uses 8 rather than 4 chars, + ** then a POSIX-TZ-environment-variable-style string for use in handling + ** instants after the last transition time stored in the file + ** (with nothing between the newlines if there is no POSIX representation for + ** such instants). + */ + + /* ** In the current implementation, "tzset()" refuses to deal with files that ** exceed any of the limits below. */ #ifndef TZ_MAX_TIMES ! #define TZ_MAX_TIMES 1200 #endif /* !defined TZ_MAX_TIMES */ #ifndef TZ_MAX_TYPES *** tzftp/private.h Thu Dec 22 09:31:15 2005 --- tzexp3/private.h Tue Jan 17 15:36:50 2006 *************** *** 21,27 **** #ifndef lint #ifndef NOID ! static char privatehid[] = "@(#)private.h 7.55"; #endif /* !defined NOID */ #endif /* !defined lint */ --- 21,27 ---- #ifndef lint #ifndef NOID ! static char privatehid[] = "@(#)private.h 7.62"; #endif /* !defined NOID */ #endif /* !defined lint */ *************** *** 48,53 **** --- 48,57 ---- #define HAVE_SETTIMEOFDAY 3 #endif /* !defined HAVE_SETTIMEOFDAY */ + #ifndef HAVE_STDINT_H + #define HAVE_STDINT_H (199901 <= __STDC_VERSION__) + #endif /* !defined HAVE_STDINT_H */ + #ifndef HAVE_STRERROR #define HAVE_STRERROR 1 #endif /* !defined HAVE_STRERROR */ *************** *** 89,95 **** #include "stdio.h" #include "errno.h" #include "string.h" ! #include "limits.h" /* for CHAR_BIT */ #include "time.h" #include "stdlib.h" --- 93,99 ---- #include "stdio.h" #include "errno.h" #include "string.h" ! #include "limits.h" /* for CHAR_BIT et al. */ #include "time.h" #include "stdlib.h" *************** *** 124,129 **** --- 128,152 ---- /* Unlike <ctype.h>'s isdigit, this also works if c < 0 | c > UCHAR_MAX. */ #define is_digit(c) ((unsigned)(c) - '0' <= 9) + #if HAVE_STDINT_H + #include <stdint.h> + #endif /* !HAVE_STDINT_H */ + + #ifndef INT_FAST64_MAX + #ifdef LLONG_MAX + typedef long long int_fast64_t; + #else /* !defined LLONG_MAX */ + typedef long int_fast64_t; + #endif /* !defined LLONG_MAX */ + #endif /* !defined INT_FAST64_MAX */ + + #ifndef INT32_MAX + #define INT32_MAX 0x7fffffff + #endif /* !defined INT32_MAX */ + #ifndef INT32_MIN + #define INT32_MIN (-1 - INT32_MAX) + #endif /* !defined INT32_MIN */ + /* ** Workarounds for compilers/systems. */ *************** *** 211,224 **** ** Private function declarations. */ ! char * icalloc P((int nelem, int elsize)); ! char * icatalloc P((char * old, const char * new)); ! char * icpyalloc P((const char * string)); ! char * imalloc P((int n)); ! void * irealloc P((void * pointer, int size)); ! void icfree P((char * pointer)); ! void ifree P((char * pointer)); ! char * scheck P((const char *string, char *format)); /* ** Finally, some convenience items. --- 234,247 ---- ** Private function declarations. */ ! char * icalloc P((int nelem, int elsize)); ! char * icatalloc P((char * old, const char * new)); ! char * icpyalloc P((const char * string)); ! char * imalloc P((int n)); ! void * irealloc P((void * pointer, int size)); ! void icfree P((char * pointer)); ! void ifree P((char * pointer)); ! const char * scheck P((const char * string, const char * format)); /* ** Finally, some convenience items. *************** *** 310,316 **** --- 333,359 ---- char *ctime_r P((time_t const *, char *)); #endif /* HAVE_INCOMPATIBLE_CTIME_R */ + #ifndef YEARSPERREPEAT + #define YEARSPERREPEAT 400 /* years before a Gregorian repeat */ + #endif /* !defined YEARSPERREPEAT */ + /* + ** The Gregorian year averages 365.2425 days, which is 31556952 seconds. + */ + + #ifndef AVGSECSPERYEAR + #define AVGSECSPERYEAR 31556952 + #endif /* !defined AVGSECSPERYEAR */ + + #ifndef SECSPERREPEAT + #define SECSPERREPEAT ((int_fast64_t) YEARSPERREPEAT * (int_fast64_t) AVGSECSPERYEAR) + #endif /* !defined SECSPERREPEAT */ + + #ifndef SECSPERREPEAT_BITS + #define SECSPERREPEAT_BITS 34 /* ceil(log2(SECSPERREPEAT)) */ + #endif /* !defined SECSPERREPEAT_BITS */ + + /* ** UNIX was a registered trademark of The Open Group in 2003. */ *** tzftp/localtime.c Thu Dec 22 09:31:14 2005 --- tzexp3/localtime.c Tue Jan 17 14:42:54 2006 *************** *** 5,11 **** #ifndef lint #ifndef NOID ! static char elsieid[] = "@(#)localtime.c 7.97"; #endif /* !defined NOID */ #endif /* !defined lint */ --- 5,11 ---- #ifndef lint #ifndef NOID ! static char elsieid[] = "@(#)localtime.c 7.98"; #endif /* !defined NOID */ #endif /* !defined lint */ *************** *** 110,115 **** --- 110,117 ---- int timecnt; int typecnt; int charcnt; + int goback; + int goahead; time_t ats[TZ_MAX_TIMES]; unsigned char types[TZ_MAX_TIMES]; struct ttinfo ttis[TZ_MAX_TYPES]; *************** *** 135,142 **** */ static long detzcode P((const char * codep)); static const char * getzname P((const char * strp)); ! static const char * getqzname P((const char * strp, const char delim)); static const char * getnum P((const char * strp, int * nump, int min, int max)); static const char * getsecs P((const char * strp, long * secsp)); --- 137,146 ---- */ static long detzcode P((const char * codep)); + static time_t detzcode64 P((const char * codep)); + static int differ_by_repeat P((time_t t1, time_t t0)); static const char * getzname P((const char * strp)); ! static const char * getqzname P((const char * strp, const int delim)); static const char * getnum P((const char * strp, int * nump, int min, int max)); static const char * getsecs P((const char * strp, long * secsp)); *************** *** 173,179 **** const struct tm * btmp)); static time_t transtime P((time_t janfirst, int year, const struct rule * rulep, long offset)); ! static int tzload P((const char * name, struct state * sp)); static int tzparse P((const char * name, struct state * sp, int lastditch)); --- 177,184 ---- const struct tm * btmp)); static time_t transtime P((time_t janfirst, int year, const struct rule * rulep, long offset)); ! static int tzload P((const char * name, struct state * sp, ! int doextend)); static int tzparse P((const char * name, struct state * sp, int lastditch)); *************** *** 234,239 **** --- 239,257 ---- return result; } + static time_t + detzcode64(codep) + const char * const codep; + { + register time_t result; + register int i; + + result = (codep[0] & 0x80) ? ~0L : 0L; + for (i = 0; i < 8; ++i) + result = result * 256 + (codep[i] & 0xff); + return result; + } + static void settzname P((void)) { *************** *** 303,315 **** } static int ! tzload(name, sp) register const char * name; register struct state * const sp; { ! register const char * p; ! register int i; ! register int fid; if (name == NULL && (name = TZDEFAULT) == NULL) return -1; --- 321,353 ---- } static int ! differ_by_repeat(t1, t0) ! const time_t t1; ! const time_t t0; ! { ! if (TYPE_INTEGRAL(time_t) && ! TYPE_BIT(time_t) - TYPE_SIGNED(time_t) < SECSPERREPEAT_BITS) ! return 0; ! return t1 - t0 == SECSPERREPEAT; ! } ! ! static int ! tzload(name, sp, doextend) register const char * name; register struct state * const sp; + register const int doextend; { ! register const char * p; ! register int i; ! register int fid; ! register int stored; ! register int nread; ! union { ! struct tzhead tzhead; ! char buf[2 * sizeof(struct tzhead) + ! 2 * sizeof *sp + ! 4 * TZ_MAX_TIMES]; ! } u; if (name == NULL && (name = TZDEFAULT) == NULL) return -1; *************** *** 347,364 **** if ((fid = open(name, OPEN_MODE)) == -1) return -1; } ! { ! struct tzhead * tzhp; ! union { ! struct tzhead tzhead; ! char buf[sizeof *sp + sizeof *tzhp]; ! } u; int ttisstdcnt; int ttisgmtcnt; - i = read(fid, u.buf, sizeof u.buf); - if (close(fid) != 0) - return -1; ttisstdcnt = (int) detzcode(u.tzhead.tzh_ttisstdcnt); ttisgmtcnt = (int) detzcode(u.tzhead.tzh_ttisgmtcnt); sp->leapcnt = (int) detzcode(u.tzhead.tzh_leapcnt); --- 385,397 ---- if ((fid = open(name, OPEN_MODE)) == -1) return -1; } ! nread = read(fid, u.buf, sizeof u.buf); ! if (close(fid) < 0 || nread <= 0) ! return -1; ! for (stored = 4; stored <= 8; stored *= 2) { int ttisstdcnt; int ttisgmtcnt; ttisstdcnt = (int) detzcode(u.tzhead.tzh_ttisstdcnt); ttisgmtcnt = (int) detzcode(u.tzhead.tzh_ttisgmtcnt); sp->leapcnt = (int) detzcode(u.tzhead.tzh_leapcnt); *************** *** 373,389 **** (ttisstdcnt != sp->typecnt && ttisstdcnt != 0) || (ttisgmtcnt != sp->typecnt && ttisgmtcnt != 0)) return -1; ! if (i - (p - u.buf) < sp->timecnt * 4 + /* ats */ sp->timecnt + /* types */ ! sp->typecnt * (4 + 2) + /* ttinfos */ sp->charcnt + /* chars */ ! sp->leapcnt * (4 + 4) + /* lsinfos */ ttisstdcnt + /* ttisstds */ ttisgmtcnt) /* ttisgmts */ return -1; for (i = 0; i < sp->timecnt; ++i) { ! sp->ats[i] = detzcode(p); ! p += 4; } for (i = 0; i < sp->timecnt; ++i) { sp->types[i] = (unsigned char) *p++; --- 406,424 ---- (ttisstdcnt != sp->typecnt && ttisstdcnt != 0) || (ttisgmtcnt != sp->typecnt && ttisgmtcnt != 0)) return -1; ! if (nread - (p - u.buf) < ! sp->timecnt * stored + /* ats */ sp->timecnt + /* types */ ! sp->typecnt * 6 + /* ttinfos */ sp->charcnt + /* chars */ ! sp->leapcnt * (stored + 4) + /* lsinfos */ ttisstdcnt + /* ttisstds */ ttisgmtcnt) /* ttisgmts */ return -1; for (i = 0; i < sp->timecnt; ++i) { ! sp->ats[i] = (stored == 4) ? ! detzcode(p) : detzcode64(p); ! p += stored; } for (i = 0; i < sp->timecnt; ++i) { sp->types[i] = (unsigned char) *p++; *************** *** 411,418 **** register struct lsinfo * lsisp; lsisp = &sp->lsis[i]; ! lsisp->ls_trans = detzcode(p); ! p += 4; lsisp->ls_corr = detzcode(p); p += 4; } --- 446,454 ---- register struct lsinfo * lsisp; lsisp = &sp->lsis[i]; ! lsisp->ls_trans = (stored == 4) ? ! detzcode(p) : detzcode64(p); ! p += stored; lsisp->ls_corr = detzcode(p); p += 4; } *************** *** 469,475 **** --- 505,567 ---- } break; } + /* + ** If this is an old file, we're done. + */ + if (u.tzhead.tzh_version[0] == '\0') + break; + nread -= p - u.buf; + for (i = 0; i < nread; ++i) + u.buf[i] = p[i]; + /* + ** If this is a narrow integer time_t system, we're done. + */ + if (stored >= (int) sizeof(time_t) && TYPE_INTEGRAL(time_t)) + break; } + if (doextend && nread > 2 && + u.buf[0] == '\n' && u.buf[nread - 1] == '\n' && + sp->typecnt + 2 <= TZ_MAX_TYPES) { + struct state ts; + register int result; + + u.buf[nread - 1] = '\0'; + result = tzparse(&u.buf[1], &ts, FALSE); + if (result == 0 && ts.typecnt == 2 && + sp->charcnt + ts.charcnt <= TZ_MAX_CHARS) { + for (i = 0; i < 2; ++i) + ts.ttis[i].tt_abbrind += + sp->charcnt; + for (i = 0; i < ts.charcnt; ++i) + sp->chars[sp->charcnt++] = + ts.chars[i]; + i = 0; + while (i < ts.timecnt && + ts.ats[i] <= + sp->ats[sp->timecnt - 1]) + ++i; + while (i < ts.timecnt && + sp->timecnt < TZ_MAX_TIMES) { + sp->ats[sp->timecnt] = + ts.ats[i]; + sp->types[sp->timecnt] = + sp->typecnt + + ts.types[i]; + ++sp->timecnt; + ++i; + } + sp->ttis[sp->typecnt++] = ts.ttis[0]; + sp->ttis[sp->typecnt++] = ts.ttis[1]; + } + } + i = 2 * YEARSPERREPEAT; + sp->goback = sp->goahead = sp->timecnt > i; + sp->goback &= sp->types[i] == sp->types[0] && + differ_by_repeat(sp->ats[i], sp->ats[0]); + sp->goahead &= + sp->types[sp->timecnt - 1] == sp->types[sp->timecnt - 1 - i] && + differ_by_repeat(sp->ats[sp->timecnt - 1], + sp->ats[sp->timecnt - 1 - i]); return 0; } *************** *** 502,520 **** /* ** Given a pointer into an extended time zone string, scan until the ending ! ** delimiter of the zone name is located. Return a pointer to the delimiter. ** ** As with getzname above, the legal character set is actually quite ** restricted, with other characters producing undefined results. ! ** We choose not to care - allowing almost anything to be in the zone abbrev. */ static const char * getqzname(strp, delim) register const char * strp; ! const char delim; { ! register char c; while ((c = *strp) != '\0' && c != delim) ++strp; --- 594,612 ---- /* ** Given a pointer into an extended time zone string, scan until the ending ! ** delimiter of the zone name is located. Return a pointer to the delimiter. ** ** As with getzname above, the legal character set is actually quite ** restricted, with other characters producing undefined results. ! ** We don't do any checking here; checking is done later in common-case code. */ static const char * getqzname(strp, delim) register const char * strp; ! const int delim; { ! register int c; while ((c = *strp) != '\0' && c != delim) ++strp; *************** *** 823,831 **** if (name == NULL) return -1; } ! load_result = tzload(TZDEFRULES, sp); if (load_result != 0) sp->leapcnt = 0; /* so, we're off a little */ if (*name != '\0') { if (*name == '<') { dstname = ++name; --- 915,924 ---- if (name == NULL) return -1; } ! load_result = tzload(TZDEFRULES, sp, FALSE); if (load_result != 0) sp->leapcnt = 0; /* so, we're off a little */ + sp->timecnt = 0; if (*name != '\0') { if (*name == '<') { dstname = ++name; *************** *** 865,875 **** return -1; sp->typecnt = 2; /* standard time and DST */ /* ! ** Two transitions per year, from EPOCH_YEAR to 2037. */ - sp->timecnt = 2 * (2037 - EPOCH_YEAR + 1); - if (sp->timecnt > TZ_MAX_TIMES) - return -1; sp->ttis[0].tt_gmtoff = -dstoffset; sp->ttis[0].tt_isdst = 1; sp->ttis[0].tt_abbrind = stdlen + 1; --- 958,965 ---- return -1; sp->typecnt = 2; /* standard time and DST */ /* ! ** Two transitions per year, from EPOCH_YEAR forward. */ sp->ttis[0].tt_gmtoff = -dstoffset; sp->ttis[0].tt_isdst = 1; sp->ttis[0].tt_abbrind = stdlen + 1; *************** *** 879,885 **** atp = sp->ats; typep = sp->types; janfirst = 0; ! for (year = EPOCH_YEAR; year <= 2037; ++year) { starttime = transtime(janfirst, year, &start, stdoffset); endtime = transtime(janfirst, year, &end, --- 969,979 ---- atp = sp->ats; typep = sp->types; janfirst = 0; ! for (year = EPOCH_YEAR; ! sp->timecnt + 2 <= TZ_MAX_TIMES; ! ++year) { ! time_t newfirst; ! starttime = transtime(janfirst, year, &start, stdoffset); endtime = transtime(janfirst, year, &end, *************** *** 895,902 **** *atp++ = endtime; *typep++ = 1; /* DST ends */ } ! janfirst += year_lengths[isleap(year)] * SECSPERDAY; } } else { register long theirstdoffset; --- 989,1001 ---- *atp++ = endtime; *typep++ = 1; /* DST ends */ } ! sp->timecnt += 2; ! newfirst = janfirst; ! newfirst += year_lengths[isleap(year)] * SECSPERDAY; + if (newfirst <= janfirst) + break; + janfirst = newfirst; } } else { register long theirstdoffset; *************** *** 1011,1017 **** gmtload(sp) struct state * const sp; { ! if (tzload(gmt, sp) != 0) (void) tzparse(gmt, sp, TRUE); } --- 1110,1116 ---- gmtload(sp) struct state * const sp; { ! if (tzload(gmt, sp, TRUE) != 0) (void) tzparse(gmt, sp, TRUE); } *************** *** 1038,1044 **** } } #endif /* defined ALL_STATE */ ! if (tzload((char *) NULL, lclptr) != 0) gmtload(lclptr); settzname(); } --- 1137,1143 ---- } } #endif /* defined ALL_STATE */ ! if (tzload((char *) NULL, lclptr, TRUE) != 0) gmtload(lclptr); settzname(); } *************** *** 1080,1086 **** lclptr->ttis[0].tt_gmtoff = 0; lclptr->ttis[0].tt_abbrind = 0; (void) strcpy(lclptr->chars, gmt); ! } else if (tzload(name, lclptr) != 0) if (name[0] == ':' || tzparse(name, lclptr, FALSE) != 0) (void) gmtload(lclptr); settzname(); --- 1179,1185 ---- lclptr->ttis[0].tt_gmtoff = 0; lclptr->ttis[0].tt_abbrind = 0; (void) strcpy(lclptr->chars, gmt); ! } else if (tzload(name, lclptr, TRUE) != 0) if (name[0] == ':' || tzparse(name, lclptr, FALSE) != 0) (void) gmtload(lclptr); settzname(); *************** *** 1113,1118 **** --- 1212,1256 ---- if (sp == NULL) return gmtsub(timep, offset, tmp); #endif /* defined ALL_STATE */ + if ((sp->goback && t < sp->ats[0]) || + (sp->goahead && t > sp->ats[sp->timecnt - 1])) { + time_t newt = t; + register time_t seconds; + register time_t tcycles; + register int_fast64_t icycles; + + if (t < sp->ats[0]) + seconds = sp->ats[0] - t; + else seconds = t - sp->ats[sp->timecnt - 1]; + --seconds; + tcycles = seconds / YEARSPERREPEAT / AVGSECSPERYEAR; + ++tcycles; + icycles = tcycles; + if (tcycles - icycles >= 1 || icycles - tcycles >= 1) + return NULL; + seconds = icycles; + seconds *= YEARSPERREPEAT; + seconds *= AVGSECSPERYEAR; + if (t < sp->ats[0]) + newt += seconds; + else newt -= seconds; + if (newt < sp->ats[0] || + newt > sp->ats[sp->timecnt - 1]) + return NULL; /* "cannot happen" */ + result = localsub(&newt, offset, tmp); + if (result == tmp) { + register time_t newy; + + newy = tmp->tm_year; + if (t < sp->ats[0]) + newy -= icycles * YEARSPERREPEAT; + else newy += icycles * YEARSPERREPEAT; + tmp->tm_year = newy; + if (tmp->tm_year != newy) + return NULL; + } + return result; + } if (sp->timecnt == 0 || t < sp->ats[0]) { i = 0; while (sp->ttis[i].tt_isdst) *** tzftp/zic.c Thu Dec 22 09:31:15 2005 --- tzexp3/zic.c Tue Jan 17 15:17:09 2006 *************** *** 1,15 **** ! static char elsieid[] = "@(#)zic.c 7.128"; - /* - ** Regardless of the type of time_t, we do our work using this type. - */ - - typedef int zic_t; - #include "private.h" #include "locale.h" #include "tzfile.h" #ifndef ZIC_MAX_ABBR_LEN_WO_WARN #define ZIC_MAX_ABBR_LEN_WO_WARN 6 #endif /* !defined ZIC_MAX_ABBR_LEN_WO_WARN */ --- 1,13 ---- ! static char elsieid[] = "@(#)zic.c 7.129"; #include "private.h" #include "locale.h" #include "tzfile.h" + #define ZIC_VERSION '2' + + typedef int_fast64_t zic_t; + #ifndef ZIC_MAX_ABBR_LEN_WO_WARN #define ZIC_MAX_ABBR_LEN_WO_WARN 6 #endif /* !defined ZIC_MAX_ABBR_LEN_WO_WARN */ *************** *** 36,41 **** --- 34,44 ---- #define isascii(x) 1 #endif + #define OFFSET_STRLEN_MAXIMUM (7 + INT_STRLEN_MAXIMUM(long)) + #define RULE_STRLEN_MAXIMUM 8 /* "Mdd.dd.d" */ + + #define end(cp) (strchr((cp), '\0')) + struct rule { const char * r_filename; int r_linenum; *************** *** 44,49 **** --- 47,54 ---- int r_loyear; /* for example, 1986 */ int r_hiyear; /* for example, 1986 */ const char * r_yrtype; + int r_lowasnum; + int r_hiwasnum; int r_month; /* 0..11 */ *************** *** 103,111 **** static void associate P((void)); static int ciequal P((const char * ap, const char * bp)); static void convert P((long val, char * buf)); static void dolink P((const char * fromfile, const char * tofile)); static void doabbr P((char * abbr, const char * format, ! const char * letters, int isdst)); static void eat P((const char * name, int num)); static void eats P((const char * name, int num, const char * rname, int rnum)); --- 108,117 ---- static void associate P((void)); static int ciequal P((const char * ap, const char * bp)); static void convert P((long val, char * buf)); + static void convert64 P((zic_t val, char * buf)); static void dolink P((const char * fromfile, const char * tofile)); static void doabbr P((char * abbr, const char * format, ! const char * letters, int isdst, int doquotes)); static void eat P((const char * name, int num)); static void eats P((const char * name, int num, const char * rname, int rnum)); *************** *** 121,126 **** --- 127,133 ---- static int inzcont P((char ** fields, int nfields)); static int inzone P((char ** fields, int nfields)); static int inzsub P((char ** fields, int nfields, int iscont)); + static int is32 P((zic_t x)); static int itsabbr P((const char * abbr, const char * word)); static int itsdir P((const char * name)); static int lowerit P((int c)); *************** *** 130,135 **** --- 137,143 ---- static long oadd P((long t1, long t2)); static void outzone P((const struct zone * zp, int ntzones)); static void puttzcode P((long code, FILE * fp)); + static void puttzcode64 P((zic_t code, FILE * fp)); static int rcomp P((const void * leftp, const void * rightp)); static zic_t rpytime P((const struct rule * rp, int wantedy)); static void rulesub P((struct rule * rp, *************** *** 136,145 **** const char * loyearp, const char * hiyearp, const char * typep, const char * monthp, const char * dayp, const char * timep)); static void setboundaries P((void)); static zic_t tadd P((zic_t t1, long t2)); static void usage P((void)); ! static void writezone P((const char * name)); static int yearistype P((int year, const char * type)); #if !HAVE_STRERROR --- 144,158 ---- const char * loyearp, const char * hiyearp, const char * typep, const char * monthp, const char * dayp, const char * timep)); + static int stringoffset P((char * result, long offset)); + static int stringrule P((char * result, const struct rule * rp, + long dstoff, long gmtoff)); + static void stringzone P((char * result, + const struct zone * zp, int ntzones)); static void setboundaries P((void)); static zic_t tadd P((zic_t t1, long t2)); static void usage P((void)); ! static void writezone P((const char * name, const char * string)); static int yearistype P((int year, const char * type)); #if !HAVE_STRERROR *************** *** 150,162 **** static int errors; static const char * filename; static int leapcnt; static int linenum; static zic_t max_time; static int max_year; - static int max_year_representable; static zic_t min_time; static int min_year; - static int min_year_representable; static int noise; static const char * rfilename; static int rlinenum; --- 163,178 ---- static int errors; static const char * filename; static int leapcnt; + static int leapseen; + static int leapminyear; + static int leapmaxyear; static int linenum; + static int max_abbrvar_len; + static int max_format_len; static zic_t max_time; static int max_year; static zic_t min_time; static int min_year; static int noise; static const char * rfilename; static int rlinenum; *************** *** 453,459 **** usage P((void)) { (void) fprintf(stderr, _("%s: usage is %s \ ! [ --version ] [ -s ] [ -v ] [ -l localtime ] [ -p posixrules ] \\\n\ \t[ -d directory ] [ -L leapseconds ] [ -y yearistype ] [ filename ... ]\n"), progname, progname); exit(EXIT_FAILURE); --- 469,475 ---- usage P((void)) { (void) fprintf(stderr, _("%s: usage is %s \ ! [ --version ] [ -v ] [ -l localtime ] [ -p posixrules ] \\\n\ \t[ -d directory ] [ -L leapseconds ] [ -y yearistype ] [ filename ... ]\n"), progname, progname); exit(EXIT_FAILURE); *************** *** 464,470 **** static const char * directory; static const char * leapsec; static const char * yitcommand; - static int sflag = FALSE; int main(argc, argv) --- 480,485 ---- *************** *** 486,491 **** --- 501,511 ---- (void) textdomain(TZ_DOMAIN); #endif /* HAVE_GETTEXT */ progname = argv[0]; + if (TYPE_BIT(zic_t) < 64) { + (void) fprintf(stderr, "%s: %s\n", progname, + _("wild compilation-time specification of zic_t")); + exit(EXIT_FAILURE); + } for (i = 1; i < argc; ++i) if (strcmp(argv[i], "--version") == 0) { (void) printf("%s\n", elsieid); *************** *** 549,555 **** noise = TRUE; break; case 's': ! sflag = TRUE; break; } if (optind == argc - 1 && strcmp(argv[optind], "=") == 0) --- 569,575 ---- noise = TRUE; break; case 's': ! (void) printf("%s: -s ignored\n", progname); break; } if (optind == argc - 1 && strcmp(argv[optind], "=") == 0) *************** *** 671,724 **** ifree(toname); } ! #ifndef INT_MAX ! #define INT_MAX ((int) (((unsigned)~0)>>1)) ! #endif /* !defined INT_MAX */ - #ifndef INT_MIN - #define INT_MIN ((int) ~(((unsigned)~0)>>1)) - #endif /* !defined INT_MIN */ - - /* - ** The tz file format currently allows at most 32-bit quantities. - ** This restriction should be removed before signed 32-bit values - ** wrap around in 2038, but unfortunately this will require a - ** change to the tz file format. - */ - - #define MAX_BITS_IN_FILE 32 - #define TIME_T_BITS_IN_FILE ((TYPE_BIT(zic_t) < MAX_BITS_IN_FILE) ? \ - TYPE_BIT(zic_t) : MAX_BITS_IN_FILE) - static void setboundaries P((void)) { register int i; ! if (TYPE_SIGNED(zic_t)) { ! min_time = -1; ! for (i = 0; i < TIME_T_BITS_IN_FILE - 1; ++i) ! min_time *= 2; ! max_time = -(min_time + 1); ! if (sflag) ! min_time = 0; ! } else { ! min_time = 0; ! max_time = 2 - sflag; ! for (i = 0; i < TIME_T_BITS_IN_FILE - 1; ++i) ! max_time *= 2; ! --max_time; ! } ! { ! time_t t; ! ! t = (time_t) min_time; ! min_year = TM_YEAR_BASE + gmtime(&t)->tm_year; ! t = (time_t) max_time; ! max_year = TM_YEAR_BASE + gmtime(&t)->tm_year; ! } ! min_year_representable = min_year; ! max_year_representable = max_year; } static int --- 691,707 ---- ifree(toname); } ! #define TIME_T_BITS_IN_FILE 64 static void setboundaries P((void)) { register int i; ! min_time = -1; ! for (i = 0; i < TIME_T_BITS_IN_FILE - 1; ++i) ! min_time *= 2; ! max_time = -(min_time + 1); } static int *************** *** 993,998 **** --- 976,983 ---- fields[RF_MONTH], fields[RF_DAY], fields[RF_TOD]); r.r_name = ecpyalloc(fields[RF_NAME]); r.r_abbrvar = ecpyalloc(fields[RF_ABBRVAR]); + if (max_abbrvar_len < strlen(r.r_abbrvar)) + max_abbrvar_len = strlen(r.r_abbrvar); rules = (struct rule *) (void *) erealloc((char *) rules, (int) ((nrules + 1) * sizeof *rules)); rules[nrules++] = r; *************** *** 1098,1103 **** --- 1083,1090 ---- } z.z_rule = ecpyalloc(fields[i_rule]); z.z_format = ecpyalloc(fields[i_format]); + if (max_format_len < strlen(z.z_format)) + max_format_len = strlen(z.z_format); hasuntil = nfields > i_untilyear; if (hasuntil) { z.z_untilrule.r_filename = filename; *************** *** 1159,1164 **** --- 1146,1156 ---- error(_("invalid leaping year")); return; } + if (!leapseen || leapmaxyear < year) + leapmaxyear = year; + if (!leapseen || leapminyear < year) + leapminyear = year; + leapseen = TRUE; j = EPOCH_YEAR; while (j != year) { if (year > j) { *************** *** 1313,1319 **** */ cp = loyearp; lp = byword(cp, begin_years); ! if (lp != NULL) switch ((int) lp->l_value) { case YR_MINIMUM: rp->r_loyear = INT_MIN; break; --- 1305,1312 ---- */ cp = loyearp; lp = byword(cp, begin_years); ! rp->r_lowasnum = lp == NULL; ! if (!rp->r_lowasnum) switch ((int) lp->l_value) { case YR_MINIMUM: rp->r_loyear = INT_MIN; break; *************** *** 1328,1341 **** } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_loyear) != 1) { error(_("invalid starting year")); return; - } else if (noise) { - if (rp->r_loyear < min_year_representable) - warning(_("starting year too low to be represented")); - else if (rp->r_loyear > max_year_representable) - warning(_("starting year too high to be represented")); } cp = hiyearp; ! if ((lp = byword(cp, end_years)) != NULL) switch ((int) lp->l_value) { case YR_MINIMUM: rp->r_hiyear = INT_MIN; break; --- 1321,1331 ---- } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_loyear) != 1) { error(_("invalid starting year")); return; } cp = hiyearp; ! lp = byword(cp, end_years); ! rp->r_hiwasnum = lp == NULL; ! if (!rp->r_hiwasnum) switch ((int) lp->l_value) { case YR_MINIMUM: rp->r_hiyear = INT_MIN; break; *************** *** 1353,1363 **** } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_hiyear) != 1) { error(_("invalid ending year")); return; - } else if (noise) { - if (rp->r_loyear < min_year_representable) - warning(_("ending year too low to be represented")); - else if (rp->r_loyear > max_year_representable) - warning(_("ending year too high to be represented")); } if (rp->r_loyear > rp->r_hiyear) { error(_("starting year greater than ending year")); --- 1343,1348 ---- *************** *** 1372,1379 **** } rp->r_yrtype = ecpyalloc(typep); } - if (rp->r_loyear < min_year && rp->r_loyear > 0) - min_year = rp->r_loyear; /* ** Day work. ** Accept things such as: --- 1357,1362 ---- *************** *** 1427,1433 **** char * const buf; { register int i; ! register long shift; for (i = 0, shift = 24; i < 4; ++i, shift -= 8) buf[i] = val >> shift; --- 1410,1416 ---- char * const buf; { register int i; ! register int shift; for (i = 0, shift = 24; i < 4; ++i, shift -= 8) buf[i] = val >> shift; *************** *** 1434,1439 **** --- 1417,1434 ---- } static void + convert64(val, buf) + const zic_t val; + char * const buf; + { + register int i; + register int shift; + + for (i = 0, shift = 56; i < 8; ++i, shift -= 8) + buf[i] = val >> shift; + } + + static void puttzcode(val, fp) const long val; FILE * const fp; *************** *** 1444,1471 **** (void) fwrite((void *) buf, (size_t) sizeof buf, (size_t) 1, fp); } static int atcomp(avp, bvp) ! void * avp; ! void * bvp; { ! if (((struct attype *) avp)->at < ((struct attype *) bvp)->at) ! return -1; ! else if (((struct attype *) avp)->at > ((struct attype *) bvp)->at) ! return 1; ! else return 0; } static void ! writezone(name) const char * const name; { ! register FILE * fp; ! register int i, j; ! static char * fullname; ! static struct tzhead tzh; ! zic_t ats[TZ_MAX_TIMES]; ! unsigned char types[TZ_MAX_TIMES]; /* ** Sort. --- 1439,1488 ---- (void) fwrite((void *) buf, (size_t) sizeof buf, (size_t) 1, fp); } + static void + puttzcode64(val, fp) + const zic_t val; + FILE * const fp; + { + char buf[8]; + + convert64(val, buf); + (void) fwrite((void *) buf, (size_t) sizeof buf, (size_t) 1, fp); + } + static int atcomp(avp, bvp) ! const void * avp; ! const void * bvp; { ! const zic_t a = ((const struct attype *) avp)->at; ! const zic_t b = ((const struct attype *) bvp)->at; ! ! return (a < b) ? -1 : (a > b); } + static int + is32(x) + const zic_t x; + { + return INT32_MIN <= x && x <= INT32_MAX; + } + static void ! writezone(name, string) const char * const name; + const char * const string; { ! register FILE * fp; ! register int i, j; ! register int leapcnt32, leapi32; ! register int timecnt32, timei32; ! register int pass; ! static char * fullname; ! static const struct tzhead tzh0; ! static struct tzhead tzh; ! zic_t ats[TZ_MAX_TIMES]; ! unsigned char types[TZ_MAX_TIMES]; /* ** Sort. *************** *** 1509,1514 **** --- 1526,1561 ---- ats[i] = attypes[i].at; types[i] = attypes[i].type; } + /* + ** Correct for leap seconds. + */ + for (i = 0; i < timecnt; ++i) { + j = leapcnt; + while (--j >= 0) + if (ats[i] >= trans[j]) { + ats[i] = tadd(ats[i], corr[j]); + break; + } + } + /* + ** Figure out 32-bit-limited starts and counts. + */ + timecnt32 = timecnt; + timei32 = 0; + leapcnt32 = leapcnt; + leapi32 = 0; + while (timecnt32 > 0 && !is32(ats[timecnt32 - 1])) + --timecnt32; + while (timecnt32 > 0 && !is32(ats[timei32])) { + --timecnt32; + ++timei32; + } + while (leapcnt32 > 0 && !is32(trans[leapcnt32 - 1])) + --leapcnt32; + while (leapcnt32 > 0 && !is32(trans[leapi32])) { + --leapcnt32; + ++leapi32; + } fullname = erealloc(fullname, (int) (strlen(directory) + 1 + strlen(name) + 1)); (void) sprintf(fullname, "%s/%s", directory, name); *************** *** 1533,1599 **** exit(EXIT_FAILURE); } } ! convert(eitol(typecnt), tzh.tzh_ttisgmtcnt); ! convert(eitol(typecnt), tzh.tzh_ttisstdcnt); ! convert(eitol(leapcnt), tzh.tzh_leapcnt); ! convert(eitol(timecnt), tzh.tzh_timecnt); ! convert(eitol(typecnt), tzh.tzh_typecnt); ! convert(eitol(charcnt), tzh.tzh_charcnt); ! (void) strncpy(tzh.tzh_magic, TZ_MAGIC, sizeof tzh.tzh_magic); #define DO(field) (void) fwrite((void *) tzh.field, \ (size_t) sizeof tzh.field, (size_t) 1, fp) ! DO(tzh_magic); ! DO(tzh_reserved); ! DO(tzh_ttisgmtcnt); ! DO(tzh_ttisstdcnt); ! DO(tzh_leapcnt); ! DO(tzh_timecnt); ! DO(tzh_typecnt); ! DO(tzh_charcnt); #undef DO ! for (i = 0; i < timecnt; ++i) { ! j = leapcnt; ! while (--j >= 0) ! if (ats[i] >= trans[j]) { ! ats[i] = tadd(ats[i], corr[j]); ! break; } ! puttzcode((long) ats[i], fp); } ! if (timecnt > 0) ! (void) fwrite((void *) types, (size_t) sizeof types[0], ! (size_t) timecnt, fp); ! for (i = 0; i < typecnt; ++i) { ! puttzcode((long) gmtoffs[i], fp); ! (void) putc(isdsts[i], fp); ! (void) putc(abbrinds[i], fp); ! } ! if (charcnt != 0) ! (void) fwrite((void *) chars, (size_t) sizeof chars[0], ! (size_t) charcnt, fp); ! for (i = 0; i < leapcnt; ++i) { ! if (roll[i]) { ! if (timecnt == 0 || trans[i] < ats[0]) { ! j = 0; ! while (isdsts[j]) ! if (++j >= typecnt) { ! j = 0; ! break; ! } ! } else { ! j = 1; ! while (j < timecnt && trans[i] >= ats[j]) ! ++j; ! j = types[j - 1]; ! } ! puttzcode((long) tadd(trans[i], -gmtoffs[j]), fp); ! } else puttzcode((long) trans[i], fp); ! puttzcode((long) corr[i], fp); ! } ! for (i = 0; i < typecnt; ++i) ! (void) putc(ttisstds[i], fp); ! for (i = 0; i < typecnt; ++i) ! (void) putc(ttisgmts[i], fp); if (ferror(fp) || fclose(fp)) { (void) fprintf(stderr, _("%s: Error writing %s\n"), progname, fullname); --- 1580,1699 ---- exit(EXIT_FAILURE); } } ! for (pass = 1; pass <= 2; ++pass) { ! register int thistimei, thistimecnt; ! register int thisleapi, thisleapcnt; ! register int thistimelim, thisleaplim; ! int writetype[TZ_MAX_TIMES]; ! int typemap[TZ_MAX_TYPES]; ! register int thistypecnt; ! ! if (pass == 1) { ! thistimei = timei32; ! thistimecnt = timecnt32; ! thisleapi = leapi32; ! thisleapcnt = leapcnt32; ! } else { ! thistimei = 0; ! thistimecnt = timecnt; ! thisleapi = 0; ! thisleapcnt = leapcnt; ! } ! thistimelim = thistimei + thistimecnt; ! thisleaplim = thisleapi + thisleapcnt; ! for (i = 0; i < typecnt; ++i) ! writetype[i] = thistimecnt == timecnt; ! if (thistimecnt == 0) ! writetype[types[thistimelim - 1]] = TRUE; ! else { ! for (i = thistimei - 1; i < thistimelim; ++i) ! if (i >= 0) ! writetype[types[i]] = TRUE; ! /* ! ** For America/Godthab and Antarctica/Palmer ! */ ! if (thistimei == 0) ! writetype[0] = TRUE; ! } ! thistypecnt = 0; ! for (i = 0; i < typecnt; ++i) ! typemap[i] = writetype[i] ? thistypecnt++ : -1; #define DO(field) (void) fwrite((void *) tzh.field, \ (size_t) sizeof tzh.field, (size_t) 1, fp) ! tzh = tzh0; ! (void) strncpy(tzh.tzh_magic, TZ_MAGIC, sizeof tzh.tzh_magic); ! tzh.tzh_version[0] = ZIC_VERSION; ! convert(eitol(thistypecnt), tzh.tzh_ttisgmtcnt); ! convert(eitol(thistypecnt), tzh.tzh_ttisstdcnt); ! convert(eitol(thisleapcnt), tzh.tzh_leapcnt); ! convert(eitol(thistimecnt), tzh.tzh_timecnt); ! convert(eitol(thistypecnt), tzh.tzh_typecnt); ! convert(eitol(charcnt), tzh.tzh_charcnt); ! DO(tzh_magic); ! DO(tzh_version); ! DO(tzh_reserved); ! DO(tzh_ttisgmtcnt); ! DO(tzh_ttisstdcnt); ! DO(tzh_leapcnt); ! DO(tzh_timecnt); ! DO(tzh_typecnt); ! DO(tzh_charcnt); #undef DO ! for (i = thistimei; i < thistimelim; ++i) ! if (pass == 1) ! puttzcode((long) ats[i], fp); ! else puttzcode64(ats[i], fp); ! for (i = thistimei; i < thistimelim; ++i) { ! unsigned char uc; ! ! uc = typemap[types[i]]; ! (void) fwrite((void *) &uc, ! (size_t) sizeof uc, ! (size_t) 1, ! fp); ! } ! for (i = 0; i < typecnt; ++i) ! if (writetype[i]) { ! puttzcode(gmtoffs[i], fp); ! (void) putc(isdsts[i], fp); ! (void) putc(abbrinds[i], fp); } ! if (charcnt != 0) ! (void) fwrite((void *) chars, (size_t) sizeof chars[0], ! (size_t) charcnt, fp); ! for (i = thisleapi; i < thisleaplim; ++i) { ! register zic_t todo; ! ! if (roll[i]) { ! if (timecnt == 0 || trans[i] < ats[0]) { ! j = 0; ! while (isdsts[j]) ! if (++j >= typecnt) { ! j = 0; ! break; ! } ! } else { ! j = 1; ! while (j < timecnt && ! trans[i] >= ats[j]) ! ++j; ! j = types[j - 1]; ! } ! todo = tadd(trans[i], -gmtoffs[j]); ! } else todo = trans[i]; ! if (pass == 1) ! puttzcode((long) todo, fp); ! else puttzcode64(todo, fp); ! puttzcode(corr[i], fp); ! } ! for (i = 0; i < typecnt; ++i) ! if (writetype[i]) ! (void) putc(ttisstds[i], fp); ! for (i = 0; i < typecnt; ++i) ! if (writetype[i]) ! (void) putc(ttisgmts[i], fp); } ! (void) fprintf(fp, "\n%s\n", string); if (ferror(fp) || fclose(fp)) { (void) fprintf(stderr, _("%s: Error writing %s\n"), progname, fullname); *************** *** 1602,1626 **** } static void ! doabbr(abbr, format, letters, isdst) char * const abbr; const char * const format; const char * const letters; const int isdst; { ! if (strchr(format, '/') == NULL) { if (letters == NULL) (void) strcpy(abbr, format); else (void) sprintf(abbr, format, letters); ! } else if (isdst) ! (void) strcpy(abbr, strchr(format, '/') + 1); ! else { ! (void) strcpy(abbr, format); ! *strchr(abbr, '/') = '\0'; } } static void outzone(zpfirst, zonecount) const struct zone * const zpfirst; const int zonecount; --- 1702,1928 ---- } static void ! doabbr(abbr, format, letters, isdst, doquotes) char * const abbr; const char * const format; const char * const letters; const int isdst; + const int doquotes; { ! register char * cp; ! register char * slashp; ! register int len; ! ! slashp = strchr(format, '/'); ! if (slashp == NULL) { if (letters == NULL) (void) strcpy(abbr, format); else (void) sprintf(abbr, format, letters); ! } else if (isdst) { ! (void) strcpy(abbr, slashp + 1); ! } else { ! if (slashp > format) ! (void) strncpy(abbr, format, ! (unsigned) (slashp - format)); ! abbr[slashp - format] = '\0'; } + if (!doquotes) + return; + for (cp = abbr; *cp != '\0'; ++cp) + if (strchr("ABCDEFGHIJKLMNOPQRSTUVWXYZ", *cp) == NULL && + strchr("abcdefghijklmnopqrstuvwxyz", *cp) == NULL) + break; + len = strlen(abbr); + if (len > 0 && *cp == '\0') + return; + abbr[len + 2] = '\0'; + abbr[len + 1] = '>'; + for ( ; len > 0; --len) + abbr[len] = abbr[len - 1]; + abbr[0] = '<'; } static void + updateminmax(x) + const int x; + { + if (min_year > x) + min_year = x; + if (max_year < x) + max_year = x; + } + + static int + stringoffset(result, offset) + char * result; + long offset; + { + register int hours; + register int minutes; + register int seconds; + + result[0] = '\0'; + if (offset < 0) { + (void) strcpy(result, "-"); + offset = -offset; + } + seconds = offset % SECSPERMIN; + offset /= SECSPERMIN; + minutes = offset % MINSPERHOUR; + offset /= MINSPERHOUR; + hours = offset; + if (hours >= HOURSPERDAY) { + result[0] = '\0'; + return -1; + } + (void) sprintf(end(result), "%d", hours); + if (minutes != 0 || seconds != 0) { + (void) sprintf(end(result), ":%02d", minutes); + if (seconds != 0) + (void) sprintf(end(result), ":%02d", seconds); + } + return 0; + } + + static int + stringrule(result, rp, dstoff, gmtoff) + char * result; + const struct rule * const rp; + const long dstoff; + const long gmtoff; + { + register long tod; + + result = end(result); + if (rp->r_dycode == DC_DOM) { + register int month, total; + + if (rp->r_dayofmonth == 29 && rp->r_month == TM_FEBRUARY) + return -1; + total = 0; + for (month = 0; month < rp->r_month; ++month) + total += len_months[0][month]; + (void) sprintf(result, "J%d", total + rp->r_dayofmonth); + } else { + register int week; + + if (rp->r_dycode == DC_DOWGEQ) { + week = 1 + rp->r_dayofmonth / DAYSPERWEEK; + if ((week - 1) * DAYSPERWEEK + 1 != rp->r_dayofmonth) + return -1; + } else if (rp->r_dycode == DC_DOWLEQ) { + if (rp->r_dayofmonth == len_months[1][rp->r_month]) + week = 5; + else { + week = 1 + rp->r_dayofmonth / DAYSPERWEEK; + if (week * DAYSPERWEEK - 1 != rp->r_dayofmonth) + return -1; + } + } else return -1; /* "cannot happen" */ + (void) sprintf(result, "M%d.%d.%d", + rp->r_month + 1, week, rp->r_wday); + } + tod = rp->r_tod; + if (rp->r_todisgmt) + tod += gmtoff; + if (rp->r_todisstd && rp->r_stdoff == 0) + tod += dstoff; + if (tod < 0) { + result[0] = '\0'; + return -1; + } + if (tod != 2 * SECSPERMIN * MINSPERHOUR) { + (void) strcat(result, "/"); + if (stringoffset(end(result), tod) != 0) + return -1; + } + return 0; + } + + static void + stringzone(result, zpfirst, zonecount) + char * result; + const struct zone * const zpfirst; + const int zonecount; + { + register const struct zone * zp; + register struct rule * rp; + register struct rule * stdrp; + register struct rule * dstrp; + register int i; + register const char * abbrvar; + + result[0] = '\0'; + zp = zpfirst + zonecount - 1; + stdrp = dstrp = NULL; + for (i = 0; i < zp->z_nrules; ++i) { + rp = &zp->z_rules[i]; + if (rp->r_hiwasnum || rp->r_hiyear != INT_MAX) + continue; + if (rp->r_yrtype != NULL) + continue; + if (rp->r_stdoff == 0) { + if (stdrp == NULL) + stdrp = rp; + else return; + } else { + if (dstrp == NULL) + dstrp = rp; + else return; + } + } + if (stdrp == NULL && dstrp == NULL) { + /* + ** There are no rules running through "max". + ** Let's find the latest rule. + */ + for (i = 0; i < zp->z_nrules; ++i) { + rp = &zp->z_rules[i]; + if (stdrp == NULL || rp->r_hiyear > stdrp->r_hiyear || + (rp->r_hiyear == stdrp->r_hiyear && + rp->r_month > stdrp->r_month)) + stdrp = rp; + } + if (stdrp != NULL && stdrp->r_stdoff != 0) + return; /* We end up in DST (a POSIX no-no). */ + /* + ** Horrid special case: if year is 2037, + ** presume this is a zone handled on a year-by-year basis; + ** do not try to apply a rule to the zone. + */ + if (stdrp != NULL && stdrp->r_hiyear == 2037) + return; + } + if (stdrp == NULL && zp->z_nrules != 0) + return; + abbrvar = (stdrp == NULL) ? "" : stdrp->r_abbrvar; + doabbr(result, zp->z_format, abbrvar, FALSE, TRUE); + if (stringoffset(end(result), -zp->z_gmtoff) != 0) { + result[0] = '\0'; + return; + } + if (dstrp == NULL) + return; + doabbr(end(result), zp->z_format, dstrp->r_abbrvar, TRUE, TRUE); + if (dstrp->r_stdoff != SECSPERMIN * MINSPERHOUR) + if (stringoffset(end(result), + -(zp->z_gmtoff + dstrp->r_stdoff)) != 0) { + result[0] = '\0'; + return; + } + (void) strcat(result, ","); + if (stringrule(result, dstrp, dstrp->r_stdoff, zp->z_gmtoff) != 0) { + result[0] = '\0'; + return; + } + (void) strcat(result, ","); + if (stringrule(result, stdrp, dstrp->r_stdoff, zp->z_gmtoff) != 0) { + result[0] = '\0'; + return; + } + } + + static void outzone(zpfirst, zonecount) const struct zone * const zpfirst; const int zonecount; *************** *** 1637,1644 **** register int startttisstd; register int startttisgmt; register int type; ! char startbuf[BUFSIZ]; INITIALIZE(untiltime); INITIALIZE(starttime); /* --- 1939,1955 ---- register int startttisstd; register int startttisgmt; register int type; ! register char * startbuf; ! register char * ab; ! register char * envvar; ! register int max_abbr_len; ! register int max_envvar_len; + max_abbr_len = 2 + max_format_len + max_abbrvar_len; + max_envvar_len = 2 * max_abbr_len + 5 * 9; + startbuf = emalloc(max_abbr_len + 1); + ab = emalloc(max_abbr_len + 1); + envvar = emalloc(max_envvar_len + 1); INITIALIZE(untiltime); INITIALIZE(starttime); /* *************** *** 1653,1659 **** --- 1964,2012 ---- */ startttisstd = FALSE; startttisgmt = FALSE; + min_year = max_year = EPOCH_YEAR; + if (leapseen) { + updateminmax(leapminyear); + updateminmax(leapmaxyear); + } for (i = 0; i < zonecount; ++i) { + zp = &zpfirst[i]; + updateminmax(zp->z_untilrule.r_loyear); + for (j = 0; j < zp->z_nrules; ++j) { + rp = &zp->z_rules[j]; + if (rp->r_lowasnum) + updateminmax(rp->r_loyear); + if (rp->r_hiwasnum) + updateminmax(rp->r_hiyear); + } + } + /* + ** Generate lots of data if a rule can't cover all future times. + */ + stringzone(envvar, zpfirst, zonecount); + if (noise && envvar[0] == '\0') { + register char * wp; + + wp = ecpyalloc(_("no POSIX environment variable for zone")); + wp = ecatalloc(wp, " "); + wp = ecatalloc(wp, zpfirst->z_name); + warning(wp); + ifree(wp); + } + if (envvar[0] == '\0') { + if (min_year >= INT_MIN + YEARSPERREPEAT) + min_year -= YEARSPERREPEAT; + else min_year = INT_MIN; + if (max_year <= INT_MAX - YEARSPERREPEAT) + max_year += YEARSPERREPEAT; + else max_year = INT_MAX; + } + /* + ** For the benefit of older systems, generate data through 2037. + */ + if (max_year < 2037) + max_year = 2037; + for (i = 0; i < zonecount; ++i) { /* ** A guess that may well be corrected later. */ *************** *** 1670,1676 **** if (zp->z_nrules == 0) { stdoff = zp->z_stdoff; doabbr(startbuf, zp->z_format, ! (char *) NULL, stdoff != 0); type = addtype(oadd(zp->z_gmtoff, stdoff), startbuf, stdoff != 0, startttisstd, startttisgmt); --- 2023,2029 ---- if (zp->z_nrules == 0) { stdoff = zp->z_stdoff; doabbr(startbuf, zp->z_format, ! (char *) NULL, stdoff != 0, FALSE); type = addtype(oadd(zp->z_gmtoff, stdoff), startbuf, stdoff != 0, startttisstd, startttisgmt); *************** *** 1700,1706 **** register int k; register zic_t jtime, ktime; register long offset; - char buf[BUFSIZ]; INITIALIZE(ktime); if (useuntil) { --- 2053,2058 ---- *************** *** 1756,1779 **** stdoff); doabbr(startbuf, zp->z_format, rp->r_abbrvar, ! rp->r_stdoff != 0); continue; } if (*startbuf == '\0' && startoff == oadd(zp->z_gmtoff, ! stdoff)) doabbr(startbuf, zp->z_format, rp->r_abbrvar, rp->r_stdoff != ! 0); } eats(zp->z_filename, zp->z_linenum, rp->r_filename, rp->r_linenum); ! doabbr(buf, zp->z_format, rp->r_abbrvar, ! rp->r_stdoff != 0); offset = oadd(zp->z_gmtoff, rp->r_stdoff); ! type = addtype(offset, buf, rp->r_stdoff != 0, rp->r_todisstd, rp->r_todisgmt); addtt(ktime, type); } --- 2108,2134 ---- stdoff); doabbr(startbuf, zp->z_format, rp->r_abbrvar, ! rp->r_stdoff != 0, ! FALSE); continue; } if (*startbuf == '\0' && startoff == oadd(zp->z_gmtoff, ! stdoff)) { doabbr(startbuf, zp->z_format, rp->r_abbrvar, rp->r_stdoff != ! 0, ! FALSE); ! } } eats(zp->z_filename, zp->z_linenum, rp->r_filename, rp->r_linenum); ! doabbr(ab, zp->z_format, rp->r_abbrvar, ! rp->r_stdoff != 0, FALSE); offset = oadd(zp->z_gmtoff, rp->r_stdoff); ! type = addtype(offset, ab, rp->r_stdoff != 0, rp->r_todisstd, rp->r_todisgmt); addtt(ktime, type); } *************** *** 1806,1812 **** starttime = tadd(starttime, -gmtoff); } } ! writezone(zpfirst->z_name); } static void --- 2161,2170 ---- starttime = tadd(starttime, -gmtoff); } } ! writezone(zpfirst->z_name, envvar); ! ifree(startbuf); ! ifree(ab); ! ifree(envvar); } static void *************** *** 2185,2192 **** will not work with pre-2004 versions of zic")); } } - if (dayoff < 0 && !TYPE_SIGNED(zic_t)) - return min_time; if (dayoff < min_time / SECSPERDAY) return min_time; if (dayoff > max_time / SECSPERDAY) --- 2543,2548 ---- *************** *** 2212,2218 **** cp = string; wp = NULL; while (isascii((unsigned char) *cp) && ! isalpha((unsigned char) *cp)) ++cp; if (cp - string == 0) wp = _("time zone abbreviation lacks alphabetic at start"); --- 2568,2574 ---- cp = string; wp = NULL; while (isascii((unsigned char) *cp) && ! isspace((unsigned char) *cp)) ++cp; if (cp - string == 0) wp = _("time zone abbreviation lacks alphabetic at start"); *** tzftp/scheck.c Thu Dec 22 09:31:15 2005 --- tzexp3/scheck.c Tue Jan 17 14:42:55 2006 *************** *** 1,6 **** #ifndef lint #ifndef NOID ! static char elsieid[] = "@(#)scheck.c 8.16"; #endif /* !defined lint */ #endif /* !defined NOID */ --- 1,6 ---- #ifndef lint #ifndef NOID ! static char elsieid[] = "@(#)scheck.c 8.17"; #endif /* !defined lint */ #endif /* !defined NOID */ *************** *** 8,27 **** #include "private.h" ! char * scheck(string, format) const char * const string; ! char * const format; { register char * fbuf; register const char * fp; register char * tp; register int c; ! register char * result; char dummy; - static char nada; ! result = &nada; if (string == NULL || format == NULL) return result; fbuf = imalloc((int) (2 * strlen(format) + 4)); --- 8,26 ---- #include "private.h" ! const char * scheck(string, format) const char * const string; ! const char * const format; { register char * fbuf; register const char * fp; register char * tp; register int c; ! register const char * result; char dummy; ! result = ""; if (string == NULL || format == NULL) return result; fbuf = imalloc((int) (2 * strlen(format) + 4));

1 0

RE: DOT issues final ruling on Indiana time zones
by Paul Schauble Jan. 19, 2006

Jan. 19, 2006

Since this is in the spring, shouldn't that last change be from 2AM CST to 3AM CDT? ++PLS -----Original Message----- From: tz-request(a)elsie.nci.nih.gov [mailto:tz-request@elsie.nci.nih.gov] On Behalf Of Deborah Goldsmith Sent: Wednesday, January 18, 2006 5:38 PM To: tz(a)lecserver.nci.nih.gov Subject: DOT issues final ruling on Indiana time zones <snip> assuming I'm interpreting everything correctly. The DOT doesn't specify whether Starke county switch to Central Time at the appropriate time for its old or new time zone, but I'm assuming the old here. That leads to it falling back from 2:00AM EST to 1:00AM CST, and then again from 2:00AM CST to 1:00AM CST. If that makes people nervous, then the transition would need to be at 3:00 AM. Deborah Goldsmith Internationalization, Unicode liaison Apple Computer, Inc. goldsmit(a)apple.com

2 1