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Daylight saving time update
Important The update in this article is superseded by the cumulative update in Microsoft Knowledge Base article 955839. To obtain the most recent information about daylight saving time (DST), click the following article number to view the article in the Microsoft Knowledge Base:
Starting in the spring of 2007, daylight saving time (DST)
start and end dates for the United States will transition to comply with the
Energy Policy Act of 2005. DST dates in the United States will start three
weeks earlier, at 2:00 A.M. on the second Sunday in March. DST will end one
week later, at 2:00 A.M. on the first Sunday in November.
The update
that this article describes changes the time zone data to account for the DST
change for the United States. This update also includes other DST-related
changes, time zone-related changes, and settings-related changes. Some of these
changes will occur in 2007. Some of these changes have occurred since the
products that are listed in the "Applies To" section were originally released.
The update that this article describes is a cumulative update rollup that
includes all the changes that were previously released in Microsoft Knowledge
Base articles 928388 and 929120. This update also describes some additional
changes since the last cumulative update in Microsoft Knowledge Base article
928388.
For more information about how daylight saving time changes
may affect other Microsoft products, visit the following Microsoft Web site:
For more information about how
daylight saving time changes may affect other Microsoft products, click the
following article number to view the article in the Microsoft Knowledge Base:
How to configure daylight saving time for the United States in 2007
Note When you apply this update, you may receive the following
message:
Update cannot be installed as a newer or same
time zone update has already been installed on the system.
This
message indicates that you have already applied the correct update or that
Windows Updates or Microsoft Update has automatically installed this update. No
additional action is required to update your Windows operating system software.
To install this update on a computer that is running Microsoft
Windows XP, you must have Windows XP Service Pack 2 installed.
Restart requirement
You do not have to restart the computer after you install this
update.
Uninstalling the cumulative update rollup
Windows time zone updates for Windows XP and Windows Server 2003
include custom logic. This custom logic guarantees the correct installation of
time zone updates and the correct state of the Windows time zone database. This
custom logic also guarantees that when you uninstall the update, the time zone
database returns to the DST rules that are in effect in the year 2006 across
all time zones.
You can uninstall only the highest version of the
cumulative update. When you uninstall this version of the cumulative update,
the time zone database reverts to the state that existed before the first
update was installed. For example, if you install update 928388 in December
2006, and then you install cumulative update 931836 in February 2007, you can
uninstall only cumulative update 931836. When you uninstall cumulative update
931836, the time zone database will revert to its pre-December state.
Additionally, if you install cumulative update 931836, Windows will not let you
install update 928388.
Update replacement information
Note You can install this cumulative update rollup even after you have
installed any of the following previously-released updates.
Windows Server 2003-based computers and Windows XP-based computers that are set to the West Australia time zone do not change to daylight saving time on December 3, 2006
File information
The English version of this update has the file
attributes (or later file attributes) that are listed in the following table.
The dates and times for these files are listed in Coordinated Universal Time
(UTC). When you view the file information, it is converted to local time. To
find the difference between UTC and local time, use the Time
Zone tab in the Date and Time item in Control Panel.
Windows Vista, 32-bit versions
Collapse this tableExpand this table
File name
File version
File
size
Date
Time
Platform
Tzres.dll.mui
6.0.6000.16483
19,456
09-May-2007
08:46
Not
Applicable
Windows Vista, 64-bit versions
Collapse this tableExpand this table
File name
File version
File
size
Date
Time
Platform
Tzres.dll.mui
6.0.6000.16483
18,944
09-May-2007
09:59
Not
Applicable
Windows Server 2003, x86-based versions
Collapse this tableExpand this table
File name
File version
File
size
Date
Time
Platform
SP
requirement
Service branch
Tzchange.exe
5.2.3790.642
58,368
02-Feb-2007
09:02
x86
None
RTMGDR
Tzchange.exe
5.2.3790.642
58,368
02-Feb-2007
09:51
x86
None
RTMQFE
Tzchange.exe
5.2.3790.2876
60,928
06-Feb-2007
09:17
x86
SP1
SP1GDR
Tzchange.exe
5.2.3790.2876
60,928
06-Feb-2007
09:55
x86
SP1
SP1QFE
Tzchange.exe
5.2.3790.4017
60,928
06-Feb-2007
12:37
x86
SP2
SP2GDR
Tzchange.exe
5.2.3790.4017
60,928
06-Feb-2007
14:42
x86
SP2
SP2QFE
Windows Server 2003, Itanium-based versions
Collapse this tableExpand this table
File name
File version
File
size
Date
Time
Platform
SP
requirement
Service branch
Tzchange.exe
5.2.3790.642
124,416
06-Feb-2007
19:35
IA-64
None
RTMGDR
Wtzchange.exe
5.2.3790.642
58,368
06-Feb-2007
19:35
x86
None
RTMGDR
Tzchange.exe
5.2.3790.642
124,416
06-Feb-2007
19:34
IA-64
None
RTMQFE
Wtzchange.exe
5.2.3790.642
58,368
06-Feb-2007
19:34
x86
None
RTMQFE
Tzchange.exe
5.2.3790.2876
136,192
06-Feb-2007
19:35
IA-64
SP1
SP1GDR
Wtzchange.exe
5.2.3790.2876
60,928
06-Feb-2007
19:35
x86
SP1
SP1GDR
Tzchange.exe
5.2.3790.2876
136,192
06-Feb-2007
19:35
IA-64
SP1
SP1QFE
Wtzchange.exe
5.2.3790.2876
60,928
06-Feb-2007
19:35
x86
SP1
SP1QFE
Tzchange.exe
5.2.3790.4017
136,192
06-Feb-2007
20:01
IA-64
SP2
SP2GDR
Wtzchange.exe
5.2.3790.4017
60,928
06-Feb-2007
20:01
x86
SP2
SP2GDR
Tzchange.exe
5.2.3790.4017
136,192
06-Feb-2007
19:35
IA-64
SP2
SP2QFE
Wtzchange.exe
5.2.3790.4017
60,928
06-Feb-2007
19:35
x86
SP2
SP2QFE
Windows Server 2003 and Windows XP, x64-based versions
Updates from the previous cumulative Windows time zone update
The following changes have been made since the previous cumulative
Windows time zone update. This was cumulative update 928388, and it was for
Windows XP and Windows Server 2003:
Central Brazilian Standard Time and E. South America
Standard Time Legal confirmation of 2007 DST laws was not received in time
to include in prior cumulative time zone update. This update also sets the
correct time to 00:00:00 for both time zones.
Iran Standard Time Legal confirmation that DST is no
longer used was not received in time to include in prior cumulative time zone
update.
Namibia Correct DST start and end dates from prior
cumulative time zone update.
Newfoundland Standard Time Adoption of the U.S. and
Canada 2007 DST rules were signed into law after the prior cumulative time zone
update was created.
W. Australia Standard Time DST trial period was signed
into law after the prior cumulative time zone update was created.
Other time zone updates that are being included with this hotfix for earlier versions and that are not listed in the following table have already been included in Windows Vista.
In addition to the changes that are listed in the previous table,
this update adds registry keys that store historical DST data for certain time
zones. These keys are present in Windows Vista and are included to keep parity
in the Windows time zone registry structure.
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\E. South America Standard Time\Dynamic DST]
"FirstEntry"=dword:000007d6
"LastEntry"=dword:000007d7
"2006"=hex:b4,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,02,00,00,00,02,00,02,00,\
00,00,00,00,00,00,00,00,0b,00,00,00,01,00,00,00,00,00,00,00,00,00
"2007"=hex:b4,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,02,00,00,00,05,00,00,00,\
00,00,00,00,00,00,00,00,0b,00,00,00,01,00,00,00,00,00,00,00,00,00
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\W. Australia Standard Time\Dynamic DST]
"FirstEntry"=dword:000007d5
"LastEntry"=dword:000007d7
"2005"=hex:20,fe,ff,ff,00,00,00,00,c4,ff,ff,ff,00,00,00,00,00,00,00,00,00,00,\
00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00
"2006"=hex:20,fe,ff,ff,00,00,00,00,c4,ff,ff,ff,d6,07,01,00,00,00,01,00,00,00,\
00,00,00,00,00,00,d6,07,0c,00,05,00,01,00,02,00,00,00,00,00,00,00
"2007"=hex:20,fe,ff,ff,00,00,00,00,c4,ff,ff,ff,00,00,03,00,00,00,05,00,03,00,\
00,00,00,00,00,00,00,00,0a,00,00,00,05,00,02,00,00,00,00,00,00,00
Mexico time zones
Three new time zones have been added for Mexico on Windows XP and
Windows Server 2003 to keep the time zone databases in parity with Vista. The
new time zones are required because some time zones that Mexico previously
shared U.S. and with Canada are no longer shared. This is because of the new
DST rules that are in effect for the U.S. and for Canada. When a computer that
is set to Mexico Standard Time or to Mexico Standard Time 2 installs this
update, the computer will be automatically set to the new time zone that is
listed in the following table. However, this is not true for computers that are
set to the GMT-08:00 time zone (Pacific Standard Time). If applicable, these
computers must be manually set to the new Pacific Standard Time (Mexico) time
zone.
Collapse this tableExpand this table
2006 Time Zone Name
2006 Display name
2007
Time Zone name
2007 Display Name
Mexico Standard Time
(GMT-06:00) Guadalajara, Mexico
City, Monterrey
Central Standard Time (Mexico)
(GMT-06:00)
Guadalajara, Mexico City, Monterrey - New
When you install this update on a computer that is running Windows
Server 2003 with Service Pack 1, and you then install Windows Server 2003
Service Pack 2, Bucharest no longer appears in the display name of the GTB time
zone. GTB Standard Time appears as "(GMT +02:00) Athens, Beirut, Istanbul,
Minsk" instead of as "(GMT +02:00) Athens, Bucharest, Istanbul." This issue
will be corrected in a future update. To work around this issue, you can use
the Time Zone Editor (Tzedit.exe) to modify the display name. Or, you can type
the following command at the command prompt:
%systemroot%\system32\tzchange.exe /F "GTB Standard Time" /N "(GMT+02:00) Athens, Bucharest, Istanbul"
The
following file is available for download from the Microsoft Download Center:
For more information about how to
download Microsoft support files, click the following article number to view
the article in the Microsoft Knowledge Base:
How to obtain Microsoft support files from online services
Microsoft scanned this file for viruses. Microsoft used the most
current virus-detection software that was available on the date that the file
was posted. The file is stored on security-enhanced servers that help prevent
any unauthorized changes to the file.
For
more information about the terms that are used to describe software updates,
click the following article number to view the article in the Microsoft
Knowledge Base:
The revision number and review dates for this article may
reflect minor editorial or structural revisions to this content. The major
technical revisions to this content are listed in this table.
Collapse this tableExpand this table
Date
Revisions
February 8, 2007
Original version
February 13, 2007
Updated the table in the "Mexico
time zones" section
February 17, 2007
Added new file list for packages
released 14-Feb-2007
February 23, 2007
The following changes were made to
this article:
Added Microsoft Windows XP Tablet PC Edition 2004 and
Microsoft Windows Server 2003 Web Edition to the "Applies to"
section
Newfoundland table entries updated
February 27, 2007
Added Windows XP Tablet PC Edition
to "Applies to" section
February 28, 2007
The following changes were made to
this article:
Replaced Windows XP Home Edition SP2 and Windows XP
Professional SP2 with Windows XP Home Edition and Windows XP Professional in
the "Applies to" section
Updated Newfoundland table entries
March 5, 2007
The following changes were made to this
article:
Updated file information table from "Windows 2000
Service Pack 5" to "Windows 2000 Service Pack 4"
Updated Newfoundland table entries
May 8, 2007
Added a note about an error message to
the end of the "Introduction" section.
May 16, 2007
Added the "Known Issues" section.
June 26, 2007
Added Windows Vista update information.
June 29, 2007
Made Windows Vista update information public (It was outsourcer) and added line "Other time zone updates that are being included with this hotfix for earlier versions and that are not listed in the following table have already been included in Windows Vista." Also corrected titles in first two KB ref links in the article.
July 9, 2007
Added the Important note to the top of the article referencing Microsoft Knowledge Base article 933360.
September 11, 2008
Replaced the Important note at the top referencing 933360. Updated with the latest cumulative update: Microsoft Knowledge Base article 951072.
February 24, 2009
Replaced the reference to Knowledge Base article 951072 at the top of the article with a reference to 955839.
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