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Article ID: 938977 - Last Review: April 10, 2013 - Revision: 10.0

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Important Potential impacts of using the new time zone are as follows:

This update for the Windows operating system is available to allow customers and partners to test and implement the new time zone for Caracas, Venezuela, prior to an official announcement of the date to move to the new time zone.

This update makes a change to your Windows operating system by installing a new time zone for Caracas, Venezuela. The name of the new time zone is Venezuela Standard Time, and the display name for this time zone is (GMT -04:30) Caracas.

The government of the Bolivarian Republic of Venezuela has announced a change to the time zone for the country, which to date has typically observed South America Western Standard Time. According to current official reports, the start date for new time zone is yet to be determined. However, it is projected to occur on or before December 31, 2007. When customers move their Windows clients to the new time zone, clocks will move backwards 30 minutes, from UTC -4:00 to UTC -4:30. This change begins at 11:59:59 PM local time on the start date. Clocks should be moved back to 11:30:00 PM rather than advancing to 12:00:00 AM (midnight).

We recommend that customers who manually update their time zone information by using this update maintain their current time zone settings and confirm the start date of the time zone change in the Bolivarian Republic of Venezuela before using the new time zone.

End users may perform this update. The resulting new time zone may remain on the time zone tab and have a display name of (GMT-04:00) La Paz until the user manually makes a transition to Venezuela Standard Time. This time zone is also known as SA Western Standard Time.

Using this new time zone before the official time zone change affects the date and time on your computer.

For more information about how to manually change your time zone, visit the following Microsoft Web sites:
How to change your computer's time and time zone in Windows Vista:
http://windowshelp.microsoft.com/Windows/en-US/Help/549bd2ed-8d98-4b4f-b600-b2fbfdef661f1033.mspx (http://windowshelp.microsoft.com/Windows/en-US/Help/549bd2ed-8d98-4b4f-b600-b2fbfdef661f1033.mspx)
How to change your computer's time and time zone in Windows XP and Windows 2003 and earlier versions:
http://www.microsoft.com/windowsxp/using/setup/tips/dst.mspx (http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/windows_date_change_time.mspx?mfr=true)
How to change the time zone in Microsoft Office:
http://office.microsoft.com/en-us/outlook/HP052432171033.aspx (http://office.microsoft.com/en-us/outlook/HP052432171033.aspx)

Potential impact to Microsoft Outlook calendars

Before you apply the update that is described in this article, be aware of potential issues that may affect Microsoft Office Outlook. For more information, click the following article number about these issues to view the article about these issues in the Microsoft Knowledge Base:
931667  (http://support.microsoft.com/kb/931667/ ) How to address the daylight saving time changes in 2007 by using the Time Zone Data Update Tool for Microsoft Office Outlook

Support for non-mainstream supported Windows versions

For more information about how to manually update the time zone information for non-mainstream version of the Windows Operating system, click the following article number to view the article in the Microsoft Knowledge Base:
914387  (http://support.microsoft.com/kb/914387/ ) How to configure daylight saving time for Microsoft Windows operating systems
Note The update that is described in this Knowledge Base article is for those versions of Windows that are currently in mainstream support.

Important Before you apply the update that is described in this article, be aware of potential issues that may affect Outlook. For more information about these issues, click the following article number to view the article in the Microsoft Knowledge Base:
931667  (http://support.microsoft.com/kb/931667/ ) How to address the daylight saving time changes in 2007 by using the Time Zone Data Update Tool for Microsoft Office Outlook

On This Page

INTRODUCTION

The government of Venezuela has announced a new time zone for Venezuela (GMT-4:30). The new time zone change takes effect at 24:00:00 (midnight) on December 31, 2007.

More information

For more information about the latest service pack for Windows Vista, click the following article number to view the article in the Microsoft Knowledge Base:
935791  (http://support.microsoft.com/kb/935791/ ) How to obtain the latest Windows Vista service pack

Update information

The December 2007 cumulative time zone update for Microsoft Windows operating systems is now available. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
942763  (http://support.microsoft.com/kb/942763/ ) December 2007 cumulative time zone update for Microsoft Windows operating systems
This hotfix is available for computers that run the following operating systems:
  • Windows XP
  • Windows Server 2003
  • Windows Vista

Hotfix information

Windows Server 2003

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:
http://support.microsoft.com/contactus/?ws=support (http://support.microsoft.com/contactus/?ws=support)
Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.
Prerequisites
To apply this hotfix, you must have one of the following service packs installed:
  • Windows Server 2003 Service Pack 1 (SP1)
  • Windows Server 2003 Service Pack 2 (SP2)
Restart requirement
You do not have to restart the computer after you apply this hotfix.
Hotfix replacement information
This hotfix does not replace any other hotfixes.
File information
The English version of this hotfix package 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 Server 2003 with SP1, x86-based versions
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Tzchange.exe5.2.3790.301160,92811-Sep-200712:48x86
Windows Server 2003 with SP2, x86-based versions
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Tzchange.exe5.2.3790.415460,92811-Sep-200712:28x86
Windows Server 2003 with SP1, x64-based versions
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatformSP requirementService branch
Tzchange.exe5.2.3790.301184,99212-Sep-200717:22x64SP1Not applicable
Wtzchange.exe5.2.3790.301160,92812-Sep-200717:22x86SP1WOW
Windows Server 2003 with SP2, x64-based versions
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatformSP requirementService branch
Tzchange.exe5.2.3790.415484,99212-Sep-200717:26x64SP2Not applicable
Wtzchange.exe5.2.3790.415460,92812-Sep-200717:26x86SP2WOW
Windows Server 2003 with SP1, Itanium-based versions
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatformSP requirementService branch
Tzchange.exe5.2.3790.3011136,19212-Sep-200717:22IA-64SP1Not applicable
Wtzchange.exe5.2.3790.301160,92812-Sep-200717:22x86SP1WOW
Windows Server 2003 with SP2, Itanium-based versions
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatformSP requirementService branch
Tzchange.exe5.2.3790.4154136,19212-Sep-200717:27IA-64SP2Not applicable
Wtzchange.exe5.2.3790.415460,92812-Sep-200717:27x86SP2WOW

Windows XP

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:
http://support.microsoft.com/contactus/?ws=support (http://support.microsoft.com/contactus/?ws=support)
Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.
Prerequisites
To apply this hotfix, you must have Windows XP Service Pack 2 (SP2) installed.
Restart requirement
You do not have to restart the computer after you apply this hotfix.
Hotfix replacement information
This hotfix does not replace any other hotfixes.
File information
The English version of this hotfix package 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 XP with SP2
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Tzchange.exe5.1.2600.321860,41611-Sep-200710:51x86

Windows Vista

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:
http://support.microsoft.com/contactus/?ws=support (http://support.microsoft.com/contactus/?ws=support)
Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.
Prerequisites
No prerequisites are required.
Restart requirement
You do not have to restart the computer after you apply this hotfix.
Hotfix replacement information
This hotfix does not replace any other hotfixes.
File information
The English version of this hotfix package 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 nameFile versionFile sizeDateTimePlatform
Tzres.dll.mui6.0.6000.1656019,45614-Sep-200702:34Not applicable
Windows Vista, 64-bit versions
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Tzres.dll.mui6.0.6000.1656018,94414-Sep-200703:43Not applicable

Workaround

To work around this issue, follow these steps:
  1. Use the Time Zone Editor tool (Tzedit.exe) to set the new DST start time and end time for the (GMT+04:00) Caracas, La Paz time zone.

    Note The Tzedit.exe tool is included in the Windows Resource Kit.
  2. Use a script or another tool to copy the registry changes that are made by the Tzedit.exe tool to client computers.
For more information about how to use the Tzedit.exe tool, click the following article number to view the article in the Microsoft Knowledge Base:
317211  (http://support.microsoft.com/kb/317211/ ) How to configure daylight saving time dates for Brazil
For more information about how to configure daylight saving time for Microsoft Windows operating systems, click the following article number to view the article in the Microsoft Knowledge Base:
914387  (http://support.microsoft.com/kb/914387/ ) How to configure daylight saving time for Microsoft Windows operating systems

Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

Applies to
  • Windows Vista Home Basic
  • Windows Vista Home Premium
  • Windows Vista Ultimate
  • Windows Vista Business
  • Windows Vista Enterprise
  • Windows Vista Starter
  • Microsoft Windows Server 2003, Standard Edition (32-bit x86)
  • Microsoft Windows Server 2003, Enterprise Edition (32-bit x86)
  • Microsoft Windows XP Home Edition
  • Microsoft Windows XP Professional
Keywords: 
kbautohotfix kbvistasp1fix kbinfo kbexpertiseinter kbqfe kbhotfixserver KB938977
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