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
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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 go to the article in the Microsoft Knowledge Base:
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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-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
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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:
914387 How to configure daylight saving time for Microsoft Windows operating systems
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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 get this updateThe following files are available for download and installation from the Microsoft Download Center:
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Operating system |
Update |
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All supported x86-based versions of Windows 8.1 |
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All supported x64-based versions of Windows 8.1 |
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All supported x64-based versions of Windows Server 2012 R2 |
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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 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-based versions of Windows Server 2008 R2 |
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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 |
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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 x64-based versions of Windows Server 2008 |
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All supported IA-based versions of Windows Server 2008 |
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 get Microsoft support files from online servicesVirus-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.
PrerequisitesWindows 8.1 and Windows Server 2012 R2To 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:
2919355 Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 update: April 2014Windows 8 and Windows Server 2012No prerequisites are required to apply this update. Windows 7 and Windows Server 2008 R2No 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:
976932 Information about Service Pack 1 for Windows 7 and for Windows Server 2008 R2Windows Server 2008To 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:
968849 How to get the latest service pack for Windows Server 2008
Registry informationTo apply this update, you don't have to make any changes to the registry.
Restart requirementYou must restart the computer after you install this cumulative update.
This update makes the following changes.
Democratic People’s Republic of KoreaThe 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."
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Time zone key name |
Display name |
DST start |
DST end |
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North Korea Standard Time |
(UTC+08:30) Pyongyang |
Not applicable |
Not applicable |
TurkeyTurkey 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:
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Start date: The last Sunday of March at 03:00 (clocks move forward by one hour)
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End date: The second Sunday of November at 04:00 (clocks move backward by one hour)
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Time zone key name |
Display name |
DST start |
DST end |
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Turkey Standard Time |
(UTC+02:00) Istanbul |
Last Sunday of March at 03:00:00.000 |
Second Sunday of November at 04:00:00.000 |
FijiDST 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:
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Start date: The first Sunday of November at 02:00 (clocks move forward by one hour)
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End date: The third Sunday of January at 03:00 (clocks move backward by one hour)
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Time zone key name |
Display name |
DST start |
DST end |
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Fiji Standard Time |
(UTC+12:00) Fiji |
First Sunday of November at 02:00:00.000 |
Third Sunday of January at 03:00:00.000 |
File informationFor a list of the files that are provided in this cumulative update, download the file information for cumulative update 3112148.
