Summary
This article describes an update that makes time zone and daylight saving time (DST) changes in Windows for Brazil, Morocco, and São Tomé and Príncipe. Before you install this update, see the Prerequisites section.
This update applies to the following operating systems:
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Windows Server 2012 R2
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Windows 8.1
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Windows RT 8.1
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Windows Server 2012
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Windows Embedded 8
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Windows Server 2008 R2 Service Pack 1 (SP1)
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Windows 7 SP1
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Windows Server 2008 Service Pack 2 (SP2)
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Windows XP Embedded
Note To get the update for Windows 10 and Windows Server 2016, install the latest cumulative updates that are listed in the Windows 10 and Windows Server 2016 update history Knowledge Base article.
Changes by location
Brazil
Starting this year, Brazil begins its DST observance on the first Sunday in November instead of the third Sunday in October. Clocks in Brazil will move forward one hour on November 4, 2018 at 00:00 hours.
|
Time zone key name |
Old DST start date |
New DST start date |
|
E. South America Standard Time Central Brazilian Standard Time |
Sunday, October 21 |
Sunday, November 4 |
Morocco
As usual, Morocco is suspending its daylight saving time (DST) period for the observation of the Muslim month of Ramadan from 03:00 on Sunday, May 13, 2018, to 02:00 on Sunday, June 17, 2018, in the Gregorian calendar. During this period, clocks are turned back to Standard Time to shorten the evenings, making it easier for Muslims to observe the Ramadan fast during daylight hours.
A Windows update will be made available in April for Windows XP Embedded, Windows Server 2008 SP2, Windows 7 SP1, Windows Server 2008 R2 SP1, and Windows Server 2012. No Windows updates are required for Windows 8.1 and later versions because those systems make the adjustments automatically.
|
Time zone key name |
Display name |
DST ends |
DST resumes |
|
Morocco Standard Time |
(UTC+00:00) Casablanca |
May 13, 2018 at 03:00 |
June 17. 2018 at 02:00 |
São Tomé and Príncipe
São Tomé and Príncipe moved from UTC+00:00 to UTC+01:00 on January 1, 2018 at 01:00 hours. A new time zone, "(UTC+01:00) Sao Tome," is being introduced for this region.
|
Time zone key name |
New time zone display name |
|
Sao Tome Standard Time |
(UTC+01:00) Sao Tome |
Update information
The update that is described in this article makes changes in the time zone and DST settings for Brazil, Morocco, and São Tomé and Príncipe.
For more information about how DST changes may affect other Microsoft products, go to the following Microsoft website:
For more information about how to configure DST settings in Windows, see the following 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 get this update
Windows Server 2012 R2, Windows 8.1, Windows Server 2012, Windows Server 2008 R2 SP1, Windows 7 SP1
Method 1: Windows Update
This update is provided as part of an Optional update rollup on Windows Update. To learn more about the update rollups that have been released for these operating systems, see the following Microsoft Knowledge Base articles:
Windows 8.1 and Windows Server 2012 R2 update history Windows 7 SP1 and Windows Server 2008 R2 SP1 update history Windows Server 2012 update history
For more information about how to run Windows Update, see How to get an update through Windows Update.
Method 2: Windows Server Update Service
This update is now available for installation through WSUS.
Method 3: Microsoft Update Catalog
To get the stand-alone package for this update, go to the Microsoft Update Catalog website.Note You must be running Microsoft Internet Explorer 6.0 or a later version.
Windows Server 2008 SP2
Method 1: Windows Update
This update is provided as an Optional update on Windows Update. For more information about how to run Windows Update, see How to get an update through Windows Update.
Method 2: Windows Server Update Service
This update is now available for installation through WSUS.
Method 3: Microsoft Update Catalog
To get the stand-alone package for this update, go to the Microsoft Update Catalog website.Note You must be running Microsoft Internet Explorer 6.0 or a later version.
Prerequisites
To apply this update, you must have the April 2014 update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 (2919355) installed on Windows 8.1 or Windows Server 2012 R2. Or, install Service Pack 1 for Windows 7 or Windows Server 2008 R2. Or, install Service Pack 2 for Windows for Windows Server 2008. There are no prerequisites to install this update on Windows Server 2012.
Registry information
To apply this update, you do not have to make any changes to the registry.
Restart requirement
You do not have to restart the computer after you install this update.
References
Learn about the terminology that Microsoft uses to describe software updates.
