Summary
This update supersedes and replaces the update that is described in Microsoft Knowledge Base (KB) article 2779562, which was released in December 2012. All additional time zone changes that were released as hotfixes after update 2779562 was released are incorporated in this update.If you have already deployed update 2779562, 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
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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 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 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 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:
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Libya Standard Time: New DST starts on the last Friday of March at 02:00, and it ends on the last Friday of October at 02:00. This new DST rules were introduced from 2013 and the new dedicated time zone was also added (UTC+1 Tripoli). This was released in January through the Microsoft Download Center (KB 2794119).
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Israel Standard Time: New DST starts on the Friday before the last Sunday of March, and ends on the last Sunday of October at 02:00. This new DST rule is applicable from 2013 to 2023.
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Pacific S.A. Standard Time: New DST ends on April 27, 2013, and starts on September 7, 2013. This change is for 2013 only. This was released in March as hotfix (KB 2821346)
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Paraguay Standard Time: New DST ends on March 23, 2013. This change incorporated the shortened DST rules for Paraguay in 2013. This was released in March as part of KB 2829069.
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West Asia Standard Time: This change adds Ashgabat to the display name. It will be introduced in all platforms as part of the August DST Cumulative Update.
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Morocco Standard Time: The change in the August DST Cumulative Update accounts only for History Correction after the DST 2013 Ramadan Fix it solution that is shipped in June 2013 (KB 2860495).
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 |
|
Libya Standard Time |
(UTC+01:00) Tripoli |
Last Friday of March 01:00:00.000 |
Last Friday of October 02:00:00.000 |
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\Libya Standard Time\Dynamic DST\ DWORD value of FirstEntry: 000007db DWORD value of LastEntry: 000007dd 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,00,00,0a,00,05,00,05,00,02,00,00,00,00,00,00,00,00,00,03,00,05,00,05,00,01,00,00,00,00,00,00,00 |
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Israel Standard Time |
(UTC+02:00) Jerusalem |
Friday before the last Sunday of March 02:00:00.000 |
Last Sunday of October 02:00:00.000 |
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\Israel Standard Time\Dynamic DST\ DWORD value of FirstEntry: 000007d4 DWORD value of LastEntry: 000007e7 HEX value of 2004: 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 2005: 88,ff,ff,ff,00,00,00,00,c4,ff,ff,ff,00,00,0a,00,00,00,02,00,02,00,00,00,00,00,00,00,00,00,04,00,05,00,01,00,02,00,00,00,00,00,00,00 HEX value of 2006: 88,ff,ff,ff,00,00,00,00,c4,ff,ff,ff,00,00,0a,00,00,00,01,00,02,00,00,00,00,00,00,00,00,00,03,00,05,00,05,00,02,00,00,00,00,00,00,00 HEX value of 2007: 88,ff,ff,ff,00,00,00,00,c4,ff,ff,ff,00,00,09,00,00,00,03,00,02,00,00,00,00,00,00,00,00,00,03,00,05,00,05,00,02,00,00,00,00,00,00,00 HEX value of 2008: 88,ff,ff,ff,00,00,00,00,c4,ff,ff,ff,00,00,0a,00,00,00,01,00,02,00,00,00,00,00,00,00,00,00,03,00,05,00,05,00,02,00,00,00,00,00,00,00 HEX value of 2009: 88,ff,ff,ff,00,00,00,00,c4,ff,ff,ff,00,00,09,00,00,00,05,00,02,00,00,00,00,00,00,00,00,00,03,00,05,00,05,00,02,00,00,00,00,00,00,00 HEX value of 2010: 88,ff,ff,ff,00,00,00,00,c4,ff,ff,ff,00,00,09,00,00,00,02,00,02,00,00,00,00,00,00,00,00,00,03,00,05,00,05,00,02,00,00,00,00,00,00,00 HEX value of 2011: 88,ff,ff,ff,00,00,00,00,c4,ff,ff,ff,00,00,0a,00,00,00,01,00,02,00,00,00,00,00,00,00,00,00,04,00,05,00,01,00,02,00,00,00,00,00,00,00 HEX value of 2012: 88,ff,ff,ff,00,00,00,00,c4,ff,ff,ff,00,00,09,00,00,00,04,00,02,00,00,00,00,00,00,00,00,00,03,00,05,00,05,00,02,00,00,00,00,00,00,00 HEX value of 2013: 88,ff,ff,ff,00,00,00,00,c4,ff,ff,ff,00,00,0a,00,00,00,05,00,02,00,00,00,00,00,00,00,00,00,03,00,05,00,05,00,02,00,00,00,00,00,00,00 HEX value of 2014: 88,ff,ff,ff,00,00,00,00,c4,ff,ff,ff,00,00,0a,00,00,00,01,00,02,00,00,00,00,00,00,00,00,00,03,00,05,00,05,00,02,00,00,00,00,00,00,00 HEX value of 2015: 88,ff,ff,ff,00,00,00,00,c4,ff,ff,ff,00,00,0a,00,00,00,01,00,02,00,00,00,00,00,00,00,00,00,03,00,05,00,05,00,02,00,00,00,00,00,00,00 HEX value of 2016: 88,ff,ff,ff,00,00,00,00,c4,ff,ff,ff,00,00,0a,00,00,00,01,00,02,00,00,00,00,00,00,00,00,00,03,00,05,00,05,00,02,00,00,00,00,00,00,00 HEX value of 2017: 88,ff,ff,ff,00,00,00,00,c4,ff,ff,ff,00,00,0a,00,00,00,02,00,02,00,00,00,00,00,00,00,00,00,03,00,05,00,04,00,02,00,00,00,00,00,00,00 HEX value of 2018: 88,ff,ff,ff,00,00,00,00,c4,ff,ff,ff,00,00,0a,00,00,00,01,00,02,00,00,00,00,00,00,00,00,00,03,00,05,00,04,00,02,00,00,00,00,00,00,00 HEX value of 2019: 88,ff,ff,ff,00,00,00,00,c4,ff,ff,ff,00,00,0a,00,00,00,01,00,02,00,00,00,00,00,00,00,00,00,03,00,05,00,05,00,02,00,00,00,00,00,00,00 HEX value of 2020: 88,ff,ff,ff,00,00,00,00,c4,ff,ff,ff,00,00,0a,00,00,00,01,00,02,00,00,00,00,00,00,00,00,00,03,00,05,00,05,00,02,00,00,00,00,00,00,00 HEX value of 2021: 88,ff,ff,ff,00,00,00,00,c4,ff,ff,ff,00,00,0a,00,00,00,01,00,02,00,00,00,00,00,00,00,00,00,03,00,05,00,05,00,02,00,00,00,00,00,00,00 HEX value of 2022: 88,ff,ff,ff,00,00,00,00,c4,ff,ff,ff,00,00,0a,00,00,00,01,00,02,00,00,00,00,00,00,00,00,00,03,00,05,00,05,00,02,00,00,00,00,00,00,00 HEX value of 2023: 88,ff,ff,ff,00,00,00,00,c4,ff,ff,ff,00,00,0a,00,00,00,02,00,02,00,00,00,00,00,00,00,00,00,03,00,05,00,04,00,02,00,00,00,00,00,00,00 |
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Pacific SA Standard Time |
(UTC-04:00) Santiago |
First Saturday of September 23:59:59.999 |
Last Saturday of April 23:59:59.999 |
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\Pacific SA Standard Time\Dynamic DST\ DWORD value of FirstEntry: 000007d7 DWORD value of LastEntry: 000007de HEX value of 2007: f0,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,03,00,06,00,02,00,17,00,3b,00,3b,00,e7,03,00,00,0a,00,06,00,02,00,17,00,3b,00,3b,00,e7,03 HEX value of 2008: f0,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,03,00,06,00,05,00,17,00,3b,00,3b,00,e7,03,00,00,0a,00,06,00,02,00,17,00,3b,00,3b,00,e7,03 HEX value of 2009: f0,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,03,00,06,00,02,00,17,00,3b,00,3b,00,e7,03,00,00,0a,00,06,00,02,00,17,00,3b,00,3b,00,e7,03 HEX value of 2010: f0,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,04,00,06,00,01,00,17,00,3b,00,3b,00,e7,03,00,00,0a,00,06,00,02,00,17,00,3b,00,3b,00,e7,03 HEX value of 2011: f0,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,05,00,06,00,01,00,17,00,3b,00,3b,00,e7,03,00,00,08,00,06,00,03,00,17,00,3b,00,3b,00,e7,03 HEX value of 2012: f0,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,04,00,06,00,05,00,17,00,3b,00,3b,00,e7,03,00,00,09,00,06,00,01,00,17,00,3b,00,3b,00,e7,03 HEX value of 2013: f0,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,04,00,06,00,05,00,17,00,3b,00,3b,00,e7,03,00,00,09,00,06,00,01,00,17,00,3b,00,3b,00,e7,03 HEX value of 2014: f0,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,03,00,06,00,02,00,17,00,3b,00,3b,00,e7,03,00,00,0a,00,06,00,02,00,17,00,3b,00,3b,00,e7,03 |
|
Paraguay Standard Time |
(UTC-04:00) Asuncion |
First Saturday of October 23:59:59.999 |
Fourth Saturday of March 23:59:59.999 |
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\Paraguay Standard Time\Dynamic DST\ DWORD value of FirstEntry: 000007d8 DWORD value of LastEntry: 000007e5 HEX value of 2008: f0,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,03,00,06,00,02,00,17,00,3b,00,3b,00,e7,03,00,00,0a,00,06,00,03,00,17,00,3b,00,3b,00,e7,03 HEX value of 2009: f0,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,03,00,06,00,01,00,17,00,3b,00,3b,00,e7,03,00,00,0a,00,06,00,03,00,17,00,3b,00,3b,00,e7,03 HEX value of 2010: f0,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,04,00,06,00,02,00,17,00,3b,00,3b,00,e7,03,00,00,0a,00,06,00,01,00,17,00,3b,00,3b,00,e7,03 HEX value of 2011: f0,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,04,00,06,00,02,00,17,00,3b,00,3b,00,e7,03,00,00,0a,00,06,00,01,00,17,00,3b,00,3b,00,e7,03 HEX value of 2012: f0,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,04,00,06,00,01,00,17,00,3b,00,3b,00,e7,03,00,00,0a,00,06,00,01,00,17,00,3b,00,3b,00,e7,03 HEX value of 2013: f0,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,03,00,06,00,04,00,17,00,3b,00,3b,00,e7,03,00,00,0a,00,06,00,01,00,17,00,3b,00,3b,00,e7,03 HEX value of 2014: f0,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,04,00,06,00,02,00,17,00,3b,00,3b,00,e7,03,00,00,0a,00,06,00,01,00,17,00,3b,00,3b,00,e7,03 HEX value of 2015: f0,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,04,00,06,00,02,00,17,00,3b,00,3b,00,e7,03,00,00,0a,00,06,00,01,00,17,00,3b,00,3b,00,e7,03 HEX value of 2016: f0,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,04,00,06,00,02,00,17,00,3b,00,3b,00,e7,03,00,00,0a,00,06,00,01,00,17,00,3b,00,3b,00,e7,03 HEX value of 2017: f0,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,04,00,06,00,02,00,17,00,3b,00,3b,00,e7,03,00,00,09,00,06,00,05,00,17,00,3b,00,3b,00,e7,03 HEX value of 2018: f0,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,04,00,06,00,01,00,17,00,3b,00,3b,00,e7,03,00,00,0a,00,06,00,01,00,17,00,3b,00,3b,00,e7,03 HEX value of 2019: f0,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,04,00,06,00,02,00,17,00,3b,00,3b,00,e7,03,00,00,0a,00,06,00,01,00,17,00,3b,00,3b,00,e7,03 HEX value of 2020: f0,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,04,00,06,00,02,00,17,00,3b,00,3b,00,e7,03,00,00,0a,00,06,00,01,00,17,00,3b,00,3b,00,e7,03 HEX value of 2021: f0,00,00,00,00,00,00,00,c4,ff,ff,ff,00,00,04,00,06,00,02,00,17,00,3b,00,3b,00,e7,03,00,00,0a,00,06,00,01,00,17,00,3b,00,3b,00,e7,03 |
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West Asia Standard Time |
(UTC+05:00) Ashgabat, Tashkent |
Not Applicable |
Not Applicable |
Not Applicable |
|
Morocco Standard Time |
(UTC) Casablanca |
Last Sunday of April 02:00:00.000 |
Last Sunday of September 03:00:00.000 |
HKEY_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,00,00,09,00,00,00,05,00,03,00,00,00,00,00,00,00,00,00,04,00,00,00,05,00,02,00,00,00,00,00,00,00 HEX value of 2014: 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 |
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.
