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Egypt has permanently canceled its observation of daylight savings time (DST). The DST adjustment for this year was scheduled to begin on Friday, July 8, 2016, at midnight (24:00). This change affects the following time zone.

Time zone key name

Display name

Egypt Standard Time

(UTC+02:00) Cairo

This update applies to the following operating systems:

  • Windows Server 2012 R2

  • Windows Server 2012

  • Windows 8.1

  • Windows Server 2008 R2 Service Pack 1 (SP1)

  • Windows 7 SP1

  • Windows Server 2008 Service Pack 2 (SP2)

  • Windows Vista SP2

Note To get the update for Windows 10, install the latest cumulative updates that are listed in the Windows 10 update history page.


The update that is described in this article removes the DST adjustment for Egypt Standard Time starting in 2016.

For more information about how DST changes may affect other Microsoft products, go to the following Microsoft website:

General information about DSTFor more information about how DST changes may affect other Microsoft products, click the following article number to go to the article in the Microsoft Knowledge Base:

914387 How to configure daylight saving time for Microsoft Windows operating systemsNote 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 obtain this updateThe following files are available for download and installation from the Microsoft Download Center:

Update for Windows Server 2012 R2 (KB3177723)

Update for Windows Server 2012 (KB3177723)

Update for Windows 8.1 for x64-based Systems (KB3177723)

Update for Windows 8.1 (KB3177723)

Update for Windows Server 2008 R2 x64 Edition (KB3177723)

Update for Windows Server 2008 R2 for Itanium-based Systems (KB3177723)

Update for Windows 7 for x64-based systems (KB3177723)

Update for Windows 7 for (KB3177723)

Update for Windows Server 2008 x64 Edition (KB3177723)

Update for Windows Server 2008 (KB3177723)

Update for Windows Server 2008 for Itanium-based systems (KB3177723)

Update for Windows Vista for x64-based Systems (KB3177723)

Update for Windows Vista (KB3177723)

Download informationFor 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 obtain 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.

PrerequisitesTo 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 Vista and for Windows Server 2008.

There are no prerequisites to install this update on Windows Server 2012.

Registry informationTo apply this update, you do not have to make any changes to the registry.

Restart requirementYou do not have to restart the computer after you install this update.

More Information

New and changed Windows time zonesFor general information about new time zones and changes to existing time zones, see the following Microsoft Daylight Saving Time & Time Zone Blog article:

Introducing New Windows Time Zones

File information

For a list of the files that are provided in this update, download the file information for update 3177723.


Learn about the terminology that Microsoft uses to describe software updates.

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