Article ID: 2904266
Expand all | Collapse all

On This Page

Summary

This update supersedes and replaces the update that is described in Microsoft Knowledge Base (KB) article 2863058, which was released in August 2013. All additional time zone changes that were released as hotfixes after update 2863058 was released are incorporated in this update.

If you have already deployed update 2863058, 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 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

  • 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
  • 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 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 obtain this update

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


Update for Windows 8 for x64-based Systems (KB2904266)
http://www.microsoft.com/downloads/details.aspx?FamilyId=d3cba233-7556-4987-9315-0b3e99af4f00

Update for Windows Server 2012 R2 (KB2904266)
http://www.microsoft.com/downloads/details.aspx?FamilyId=859be8df-78f1-4811-8341-13b9a96c8746

Update for Windows 7 (KB2904266)
http://www.microsoft.com/downloads/details.aspx?FamilyId=c39b8ec0-4df8-4bd5-8361-19f1591d09cf

Update for Windows Server 2003 for Itanium-based Systems (KB2904266)
http://www.microsoft.com/downloads/details.aspx?FamilyId=bb99faac-4c94-4cc6-865f-24ffd8776094

Update for Windows Server 2003 x64 Edition (KB2904266)
http://www.microsoft.com/downloads/details.aspx?FamilyId=ff8eacba-2d92-4d34-a772-2e00185e3239

Update for Windows 8.1 (KB2904266)
http://www.microsoft.com/downloads/details.aspx?FamilyId=74521d3b-5bcb-459e-91b6-49660ed400c8

Update for Windows Server 2012 (KB2904266)
http://www.microsoft.com/downloads/details.aspx?FamilyId=75c1425c-3a22-4246-8cb0-5a557b8b1978

Update for Windows XP (KB2904266)
http://www.microsoft.com/downloads/details.aspx?FamilyId=6ef9cf2b-86b5-4652-bd4e-62d39015509f

Update for Windows Server 2008 R2 x64 Edition (KB2904266)
http://www.microsoft.com/downloads/details.aspx?FamilyId=a048dd44-5ea3-4938-a1a0-72c3538544ed

Update for Windows 7 for x64-based Systems (KB2904266)
http://www.microsoft.com/downloads/details.aspx?FamilyId=d9cb8776-39af-47ee-96e7-7dee67fbfa1b

Update for Windows 8 (KB2904266)
http://www.microsoft.com/downloads/details.aspx?FamilyId=43e7925d-cdea-4296-aa75-807641bac651

Update for Windows Server 2008 (KB2904266)
http://www.microsoft.com/downloads/details.aspx?FamilyId=4e84f290-13b0-4fc2-a36c-85125de2c72f

Update for Windows Embedded Standard 7 for x64-based Systems (KB2904266)
http://www.microsoft.com/downloads/details.aspx?FamilyId=d24a9771-4cfc-4cea-96fd-930509f722b1

Update for Windows XP x64 Edition (KB2904266)
http://www.microsoft.com/downloads/details.aspx?FamilyId=3f3d3a85-529c-40b7-a42e-9c8b1aa9e8e0

Update for Windows Server 2008 R2 for Itanium-based Systems (KB2904266)
http://www.microsoft.com/downloads/details.aspx?FamilyId=aa1e9abb-ff8a-41e0-858e-9dc7b4804257

Update for Windows Server 2008 x64 Edition (KB2904266)
http://www.microsoft.com/downloads/details.aspx?FamilyId=d0cec226-9ec3-4bee-961c-acb5a5ebc677

Update for Windows 8.1 for x64-based Systems (KB2904266)
http://www.microsoft.com/downloads/details.aspx?FamilyId=4fef73cf-36f6-4846-997a-c57239dfeefd

Update for Windows Server 2003 (KB2904266)
http://www.microsoft.com/downloads/details.aspx?FamilyId=95f4eaf6-b7b0-46a4-b69c-ca5afc4d0bbd

Update for Windows Embedded Standard 7 (KB2904266)
http://www.microsoft.com/downloads/details.aspx?FamilyId=54d5d938-c770-4aba-b887-d51ad524665f

Update for Windows Server 2008 for Itanium-based Systems (KB2904266)
http://www.microsoft.com/downloads/details.aspx?FamilyId=3e7ab995-2ec7-4b5b-82af-d8d05e83f6bf

Update for Windows Vista for x64-based Systems (KB2904266)
http://www.microsoft.com/downloads/details.aspx?FamilyId=a5e70ce8-16bd-40de-99da-51cf83c24970

Update for Windows Vista (KB2904266)
http://www.microsoft.com/downloads/details.aspx?FamilyId=54e2a24e-8261-4864-80cb-cd3349d93724


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.

General changes made by this update

The following changes were made since the previous Windows cumulative time zone update:
  • Mid-Atlantic Time:
    The Mid-Atlantic time zone is deprecated in this update. 
  • Morocco Standard Time:
    Morocco extended the 2013 DST End Date from September 29, 2013 to October 27, 2013. Beginning in 2014, the DST period in Morocco will begin at 2:00 A.M. on the last Sunday in March, and it will end at 3:00 A.M. on the last Sunday in October.
  • Libya Standard Time:
    Libya did not end DST in 2013. From 2014, it will stay at UTC+2 with no DST.  
  • Fiji Standard Time:
    Fiji has changed its DST End Date in 2014 from January 26 to January 19 (KB 2890882).

Time zone changes made by this update

The time zone changes are summarized in the following table.

Collapse this tableExpand this table
Time zone key nameDisplay nameNew DST startNew DST endTZI subkey
Mid-Atlantic Standard Time(UTC-02:00) Mid-Atlantic - OldN/A (Deprecated)N/A (Deprecated)N/A (Deprecated)
Morocco Standard Time(UTC) CasablancaLast Sunday of March 02:00:00.000Last Sunday of October 03:00:00.000HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\Morocco Standard Time\Dynamic DST

 

DWORD value of FirstEntry: 000007d7

DWORD value of LastEntry: 000007de

 

HEX value of 2007:

00,00,00,00,00,00,00,00,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 2008:

00,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,08,00,00,00,05,00,17,00,3b,00,3b,00,e7,03,00,00,05,00,06,00,05,00,17,00,3b,00,3b,00,e7,03

HEX value of 2009:

00,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,08,00,04,00,03,00,17,00,3b,00,3b,00,e7,03,00,00,05,00,00,00,05,00,17,00,3b,00,3b,00,e7,03

HEX value of 2010:

00,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,08,00,06,00,01,00,17,00,3b,00,3b,00,e7,03,00,00,05,00,06,00,01,00,17,00,3b,00,3b,00,e7,03

HEX value of 2011:

00,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,07,00,06,00,05,00,17,00,3b,00,3b,00,e7,03,00,00,04,00,06,00,01,00,17,00,3b,00,3b,00,e7,03

HEX value of 2012:

00,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,09,00,00,00,05,00,03,00,00,00,00,00,00,00,00,00,04,00,00,00,05,00,02,00,00,00,00,00,00,00

HEX value of 2013:

00,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,0a,00,00,00,05,00,03,00,00,00,00,00,00,00,00,00,04,00,00,00,05,00,02,00,00,00,00,00,00,00

HEX value of 2014:

00,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,0a,00,00,00,05,00,03,00,00,00,00,00,00,00,00,00,03,00,00,00,05,00,02,00,00,00,00,00,00,00
Libya Standard Time(UTC+02:00) TripoliN/A (No DST)N/A (No DST)HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\Libya Standard Time\Dynamic DST

 

DWORD value of FirstEntry: 000007db

DWORD value of LastEntry: 000007de

 

HEX value of 2011:

88,ff,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 2012:

c4,ff,ff,ff,00,00,00,00,c4,ff,ff,ff,00,00,0b,00,06,00,02,00,02,00,00,00,00,00,00,00,00,00,01,00,00,00,01,00,00,00,00,00,00,00,00,00

HEX value of 2013:

c4,ff,ff,ff,00,00,00,00,c4,ff,ff,ff,00,00,01,00,02,00,01,00,00,00,00,00,00,00,00,00,00,00,03,00,05,00,05,00,01,00,00,00,00,00,00,00

HEX value of 2014:

88,ff,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
Fiji Standard Time(UTC+12:00) FijiFourth Sunday of October, 2014 at 02:00:00.000Third Sunday of January, 2014 at 03:00:00.000HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\Fiji Standard Time\Dynamic DST

 

DWORD value of FirstEntry: 000007d8

DWORD value of LastEntry: 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,00,00,01,00,00,00,03,00,03,00,00,00,00,00,00,00,00,00,0a,00,00,00,04,00,02,00,00,00,00,00,00,00

HEX value of 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
 

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 must restart the computer after you install this cumulative update.

Properties

Article ID: 2904266 - Last Review: March 11, 2014 - Revision: 3.0
Keywords: 
KB2904266

Give Feedback

 

Contact us for more help

Contact us for more help
Connect with Answer Desk for expert help.
Get more support from smallbusiness.support.microsoft.com