Summary
This update supersedes and replaces the update that is described in Microsoft Knowledge Base (KB) article 2756822 that was released in October 2012. All additional time zone changes released as hotfixes after the update 2756822 are incorporated into this update.
If you have already deployed update 2756822, read the descriptions of the specific time zone changes that are addressed in this article to determine whether you must deploy this update immediately. If systems are not directly affected, you can schedule deployment at the next available opportunity.
We recommend that you deploy the most current Windows cumulative time zone update to guarantee the consistency of the time zone database on all systems.
Important
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Before you apply the update that is described in this article, be aware of potential issues that may affect Microsoft Outlook. For more information about these issues, click the following article number to view the article in the Microsoft Knowledge Base:
931667 How to address time zone changes by using the Time Zone Data Update Tool for Microsoft Office Outlook
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Cumulative time zone updates contain only data that has changed for a specific region or that was added to maintain parity with other operating system versions. Therefore, if a time zone key is deleted, some original values may not be restored after you apply the cumulative zone update.
Note We do not recommend that you delete any registry keys that are related to time zones. On a computer that has incomplete time zone keys, first restore the time zone keys from a known good backup. Then, apply the update.
More Information
The update that is described in this article changes the time zone data to accommodate daylight saving time (DST) changes in several countries.
The update that is described in this article is a cumulative update rollup that includes all previous Windows time zone changes. For more information about how DST changes may affect other Microsoft products, go to the following Microsoft website:
General information about DST For more information about how DST changes may affect other Microsoft products, click the following article number to view the article in the Microsoft Knowledge Base:
914387 How to configure daylight saving time for Microsoft Windows operating systems Note When you apply this update, you may receive a message that resembles the following:
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 the Windows operating system.
Update information
How to obtain this update
Microsoft Download Center
The following files are available for download from the Microsoft Download Center:
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Operating system |
Update |
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All supported x86-based versions of Windows 8 |
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All supported x64-based versions of Windows 8 |
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All supported x64-based versions of Windows Server 2012 |
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All supported x86-based versions of Windows Vista |
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All supported x64-based versions of Windows Vista |
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All supported x86-based versions of Windows Server 2008 |
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All supported x64-based versions of Windows Server 2008 |
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All supported IA-64-based versions of Windows Server 2008 |
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All supported x86-based versions of Windows 7 |
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All supported x64-based versions of Windows 7 |
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All supported x64-based versions of Windows Server 2008 R2 |
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All supported IA-64-based versions of Windows Server 2008 R2 |
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All supported x64-based versions of Windows XP |
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All supported x86-based versions of Windows Server 2003 |
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All supported x64-based versions of Windows Server 2003 |
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All supported IA-64-based versions of Windows Server 2003 |
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All supported x86-based versions of Windows Embedded Standard 7 |
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All supported x64-based versions of Windows Embedded Standard 7 |
Release Date: November 27, 2012
For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591 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.
The following changes were made since the previous Windows cumulative time zone update:
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Bahia Standard Time:
Starting in 2012, Bahia Standard Time will no longer have DST. -
Azores Standard Time:
Changes reflect the end of DST on October 28, 2012 for Azores Standard Time. These changes were released as hotfix 2769756. This update includes the changes for DST for Azores Standard Time in Windows 8 and Windows Server 2012. Additionally, this update includes the changes found in hotfix 2769756. The new rules for DST for 2013 and onwards were released as part the October 2012 cumulative time zone update in update 2756822. -
Fiji Standard Time:
The government of Fiji has announced new DST rules for 2012 through 2013. DST starts at 2:00 A.M. on Sunday October 21, 2012 and ends at 3:00 A.M. on Sunday January 20, 2013. This update applies to Windows 8, Windows Server 2012, Windows 7, Windows Server 2008 R2 and down. Additionally, the changes that are included in the October 2012 cumulative time zone update that is described in update 2756822 are found in this update. -
Jordan Standard Time:
Changes the UTC offset for Jordan Standard Time from (UTC+2) to (UTC+3). Therefore, the display name of the time zone is changed to (UTC+03:00) Amman. From 2013 onwards, Jordan Standard Time will no longer have DST.
The time zone changes are summarized in the following table:
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Time zone key name |
Display name |
New DST start |
New DST end |
TZI subkey |
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Bahia Standard Time |
(UTC - 03:00) Salvador |
Not applicable |
Not applicable |
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\Bahia Standard Time\Dynamic DST
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Azores Standard Time |
(UTC-01:00) Azores |
Last Sunday of March 00:00:00.000(2012 only) |
Last Sunday of October 01:00:00.000(2012 only) |
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\Azores Standard Time\Dynamic DST
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Fiji Standard Time |
(UTC + 12:00) |
Third Sunday of October |
Third Sunday of January |
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\Fiji Standard Time\Dynamic DST
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Jordan Standard Time |
(UTC+3:00) Amman |
None |
None |
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\Jordan Standard Time\Dynamic DST
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Prerequisites
Windows XP
To apply this update, you must be running Windows XP Service Pack 3 (SP3). For more information about how to obtain a Windows XP service pack, click the following article number to view the article in the Microsoft Knowledge Base:
322389 How to obtain the latest Windows XP service pack
Windows Server 2003
To apply this update, you must be running Windows Server 2003 Service Pack 2 (SP2). For more information about how to obtain a Windows Server 2003 service pack, click the following article number to view the article in the Microsoft Knowledge Base:
889100 How to obtain the latest service pack for Windows Server 2003
Windows Vista and Windows Server 2008
To apply this update, you must be running Windows Vista Service Pack 2 (SP2) or Windows Server 2008 SP2.
For more information about how to obtain a Windows Vista service pack, click the following article number to view the article in the Microsoft Knowledge Base:
935791 How to obtain the latest Windows Vista service pack
For more information about how to obtain a Windows Server 2008 service pack, click the following article number to view the article in the Microsoft Knowledge Base:
968849 How to obtain the latest service pack for Windows Server 2008
Windows 7 and Windows Server 2008 R2
No prerequisites are required to apply this update. The same package installs both on the RTM version as well as the Service Pack 1 versions of Windows 7 and Windows Server 2008 R2. For more information about how to obtain a Windows 7 or a Windows Server 2008 R2 service pack, click the following article number to view the article in the Microsoft Knowledge Base:
976932 Information about Service Pack 1 for Windows 7 and for Windows Server 2008 R2
Windows 8 and Windows Server 2012
No prerequisites are required to apply this update.
Windows Embedded Standard 7
No prerequisites are required to apply this update. The same package installs both on the RTM version as well as the Service Pack 1 versions of Windows Embedded Standard. For more information about how to update a Device to Windows Embedded Standard 7 SP1, go to the following Microsoft website:
General information about how to update a Device to Windows Embedded Standard 7 SP1
Registry information
To apply this update, you do not have to make any changes to the registry.
Restart requirement
You may have to restart the computer after you apply this update.
Update replacement information
This update replaces the updates that are described in KB 2633952 and in KB 2756822. For more information about these KB articles, click the following article numbers to view the articles in the Microsoft Knowledge Base:
2633952 December 2011 cumulative time zone update for Microsoft Windows operating systems
2756822 October 2012 cumulative time zone update for Microsoft Windows operating systems Note You can install this cumulative update rollup even after you have installed any of the listed previously released updates.
