This article describes an update that makes daylight saving time (DST) and time zone changes in Windows for the Kingdom of Morocco and Volgograd Oblast, Russia. Before you install this update, see the Prerequisites section.

This update applies to the following operating systems:

  • Windows Server 2012 R2

  • Windows 8.1

  • Windows RT 8.1

  • Windows Server 2012

  • Windows Server 2008 R2 Service Pack 1 (SP1)

  • Windows 7 SP1

  • Windows Server 2008 Service Pack 2 (SP2)

  • 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


The Kingdom of Morocco now remains permanently set to UTC+01:00 instead of following an earlier plan to return to UTC+00:00 on October 28, 2018.

Time zone key name

Display name

Old DST end date

New DST end date

Morocco Standard Time

(UTC+01:00) Casablanca

October 28, 2018

Not applicable


Volgograd Oblast, Russia, permanently switched from UTC+03:00 to UTC+04:00 on October 28, 2018. Customers can now switch to the new time zone for Volgograd, which is displayed as (UTC+04:00) Volgograd.

Time zone key name

Display name

Old time zone

New time zone

Volgograd Standard Time

(UTC+04:00) Volgograd

(UTC+03:00) Moscow, St. Petersburg, Volgograd

(UTC+04:00) Volgograd

Additional time zone changes

The following time zone name change was made because of the creation of the Volgograd time zone. Customers in Moscow, St. Petersburg, and other parts of Russia that are covered by this time zone do not have to take any action. The time zone name will change automatically.

Old time zone

New time zone

(UTC+03:00) Moscow, St. Petersburg, Volgograd

(UTC+03:00) Moscow, St. Petersburg

Update information

The update that is described in this article makes changes in the DST settings for the Kingdom of Morocco and time zone settings for Volgograd Oblast, Russia.

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 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.

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