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December 2015, cumulative time zone update for Windows operating systems

Summary
This update supersedes and replaces the update that is described in Microsoft Knowledge Base article 3077715 that was released in August 2015. All additional time zone changes that were released as hotfixes after update 3077715 are incorporated into this update.

If you have already deployed update 3077715, read the descriptions of the specific time zone changes in the "General changes made by this update" section in this article to determine whether you must deploy this update immediately. If your system isn't 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:

  • 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 websites:


  • 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.

Update information

How to get this update

The following files are available for download and installation from the Microsoft Download Center:

Operating systemUpdate
All supported x86-based versions of Windows 8.1DownloadDownload the package now.
All supported x64-based versions of Windows 8.1 DownloadDownload the package now.
All supported x64-based versions of Windows Server 2012 R2DownloadDownload the package now.
All supported x86-based versions of Windows 8 DownloadDownload the package now.
All supported x64-based versions of Windows 8DownloadDownload the package now.
All supported x64-based versions of Windows Server 2012 DownloadDownload the package now.
All supported x86-based versions of Windows 7 DownloadDownload the package now.
All supported x64-based versions of Windows 7DownloadDownload the package now.
All supported x64-based versions of Windows Server 2008 R2DownloadDownload the package now.
All supported IA-based versions of Windows Server 2008 R2DownloadDownload the package now.
All supported x86-based versions of Windows Embedded Standard 7DownloadDownload the package now.
All supported x64-based versions of Windows Embedded Standard 7DownloadDownload the package now.
All supported x86-based versions of Windows Vista DownloadDownload the package now.
All supported x64-based versions of Windows VistaDownloadDownload the package now.
All supported x64-based versions of Windows Server 2008DownloadDownload the package now.
All supported IA-based versions of Windows Server 2008DownloadDownload the package now.


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:

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 get this update, click the following article number to go to the article in the Microsoft Knowledge Base:

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 and the Service Pack 1 versions of Windows 7 and Windows Server 2008 R2. For more information about how to get 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: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 get a Windows Server 2008 service pack, click the following article number to go to the article in the Microsoft Knowledge Base:

Registry information

To apply this update, you don't have to make any changes to the registry.

Restart requirement

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

General changes made by this update


This update makes the following changes.

Democratic People’s Republic of Korea

The Democratic People's Republic of Korea has created its own time zone. The new North Korea Standard Time will have a display name of "(UTC+08:30) Pyongyang."

Time zone key nameDisplay nameDST startDST end
North Korea Standard Time
(UTC+08:30) PyongyangNot applicableNot applicable


Turkey

Turkey will end DST two weeks later than usual for 2015. Clocks will turn back one hour from 04:00 to 03:00 on Sunday, November 8, 2015. This time zone will observe the following DST rules:
  • Start date: The last Sunday of March at 03:00 (clocks move forward by one hour)
  • End date: The second Sunday of November at 04:00 (clocks move backward by one hour)
Time zone key nameDisplay nameDST startDST end
Turkey Standard Time
(UTC+02:00) IstanbulLast Sunday of March at 03:00:00.000Second Sunday of November at 04:00:00.000

Fiji

DST in Fiji will now start on Sunday, November 1, 2015 and last for 11 weeks. Clocks will be set forward from 02:00 to 03:00 on November 1, 2015, and be set backward from 03:00 to 02:00 on Sunday, January 17, 2016. This time zone will observe the following DST rules:
  • Start date: The first Sunday of November at 02:00 (clocks move forward by one hour)
  • End date: The third Sunday of January at 03:00 (clocks move backward by one hour)
Time zone key nameDisplay nameDST startDST end
Fiji Standard Time
(UTC+12:00) FijiFirst Sunday of November at 02:00:00.000Third Sunday of January at 03:00:00.000


File information

For a list of the files that are provided in this cumulative update, download the file information for cumulative update 3112148.
Properties

Article ID: 3112148 - Last Review: 12/15/2015 07:11:00 - Revision: 2.0

Windows Server 2012 R2 Datacenter, Windows Server 2012 R2 Standard, Windows Server 2012 R2 Essentials, Windows Server 2012 R2 Foundation, Windows 8.1 Enterprise, Windows 8.1 Pro, Windows 8.1, Windows Server 2012 Datacenter, Windows Server 2012 Standard, Windows Server 2012 Essentials, Windows Server 2012 Foundation, Windows 8 Enterprise, Windows 8 Pro, Windows 8, Windows Server 2008 R2 Datacenter, Windows Server 2008 R2 Enterprise, Windows Server 2008 R2 Standard, Windows Server 2008 R2 Foundation, Windows 7 Ultimate, Windows 7 Enterprise, Windows 7 Professional, Windows 7 Home Premium, Windows 7 Home Basic, Windows 7 Starter, Windows Server 2008 Datacenter, Windows Server 2008 Enterprise, Windows Server 2008 Standard, Windows Server 2008 Foundation, Windows Vista Ultimate, Windows Vista Enterprise, Windows Vista Business, Windows Vista Home Premium, Windows Vista Home Basic, Windows Vista Starter, Windows Embedded POSReady 2009, Windows Embedded Standard 7

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