December 2014 cumulative time zone update for Windows operating systems

Summary

This update supersedes and replaces the update that is described in Microsoft Knowledge Base article 2981580, which was released in August 2014. All additional time zone changes that were released as hotfixes after update 2981580 was released are incorporated in this update.

If you have already deployed update 2981580, 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 no systems are affected directly, 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

  • 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 go to 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

  • 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-related registry subkey 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 subkeys that are related to time zones. On a computer that has incomplete time zone subkeys, first restore the time zone subkeys 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.

This 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 go to 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 either you have already applied the correct update or Windows Updates or Microsoft Update has automatically installed this update. No additional action is required to update the Windows operating system.

How to obtain this update

Microsoft Update Catalog To get the stand-alone package for this update, go to the Microsoft Update Catalog website.

For more information about how to download Microsoft support files, click the following article number to go to the article in the Microsoft Knowledge Base:

119591 How to obtain Microsoft support files from online services Virus-scan claim

Microsoft scanned these files for viruses. Microsoft used the most current virus-detection software that was available on the date that the files were posted. The files are stored on security-enhanced servers that help prevent any unauthorized changes to the files.

Prerequisites Windows 8.1 and Windows Server 2012 R2

To apply this update, you must have update 2919355 installed. For more information about how to obtain this update, click the following article number to go to the article in the Microsoft Knowledge Base:

2919355 Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 update: April 2014 Windows 8 and Windows Server 2012

No prerequisites are required to apply this update.

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 go to the article in the Microsoft Knowledge Base:

976932 Information about Service Pack 1 for Windows 7 and for Windows Server 2008 R2
  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 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 go to 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 go to the article in the Microsoft Knowledge Base:

968849 How to obtain the latest service pack for Windows Server 2008
  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 go to the article in the Microsoft Knowledge Base:

889100 How to obtain the latest service pack for Windows Server 2003 Windows XP Embedded

To apply this update, you must be running Windows XP Embedded Service Pack 3 (SP3). For more information about Windows XP Embedded SP3, click the following article number to go to the article in the Microsoft Knowledge Base:

958255 Service Pack 3 for Windows Embedded for Point of Service and Windows Fundamentals for Legacy PCs is available

Registry information To apply this update, you do not have to make any changes to the registry.

Restart requirement You must restart the computer after you install this cumulative update.
 

The following changes were made since the previous Windows cumulative time zone update:

  • Russia time zones:
    Russia announced that it would change its existing time zones on October 26, 2014. This change included seven updated time zones, three new time zones, and two existing time zones that merged into one. (2998527)

  • Fiji Standard Time:
    Fiji announced that the country's new daylight saving time (DST) schedule would start on November 2, 2014 and end on January 18, 2015. The previous DST start date in Windows for the Fiji time zone was October 26. (3011843)

  • Cape Verde Standard Time:
    We have changed the name of the “Cape Verde Standard Time” time zone to “Cabo Verde Standard Time." The display name for this time zone is now "(GMT-01:00) Cabo Verde Islands."

Time zone changes made by this update The time zone changes are summarized in the following table.


Time zone key name

Display name

New DST Start

New DST End

TZI subkey

Fiji Standard Time

(UTC+12:00) Fiji

November 2 @ 02:00:00

January 18 @ 03:00:00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\Fiji Standard Time\Dynamic DST]

"FirstEntry"=dword:000007d8
"LastEntry"=dword:000007df

HEX value of 2008:

30,fd,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

HEX value of 2009:

30,fd,ff,ff,00,00,00,00,c4,ff,ff,ff,00,00,01,00,04,00,01,00,00,00,\
00,00,00,00,00,00,00,00,0b,00,00,00,05,00,02,00,00,00,00,00,00,00

HEX value of 2010:

30,fd,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,00,00,00,04,00,02,00,00,00,00,00,00,00

HEX value of 2011:

30,fd,ff,ff,00,00,00,00,c4,ff,ff,ff,00,00,03,00,00,00,01,00,03,00,\
00,00,00,00,00,00,00,00,0a,00,00,00,04,00,02,00,00,00,00,00,00,00

HEX value of 2012:

30,fd,ff,ff,00,00,00,00,c4,ff,ff,ff,00,00,01,00,00,00,04,00,03,00,\
00,00,00,00,00,00,00,00,0a,00,00,00,03,00,02,00,00,00,00,00,00,00

HEX value of 2013:

30,fd,ff,ff,00,00,00,00,c4,ff,ff,ff,00,00,01,00,00,00,03,00,03,00,\
00,00,00,00,00,00,00,00,0a,00,00,00,04,00,02,00,00,00,00,00,00,00

HEX value of 2014:

30,fd,ff,ff,00,00,00,00,c4,ff,ff,ff,00,00,01,00,00,00,03,00,02,00,\
00,00,00,00,00,00,00,00,0a,00,00,00,04,00,02,00,00,00,00,00,00,00

HEX value of 2015:

30,fd,ff,ff,00,00,00,00,c4,ff,ff,ff,00,00,01,00,00,00,04,00,03,00,\
00,00,00,00,00,00,00,00,0a,00,00,00,04,00,02,00,00,00,00,00,00,00

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