How to configure daylight saving time for Microsoft Windows operating systems

Important Before you follow the procedures in this article, you must be aware of issues that may affect Microsoft Outlook.

For more information, see the following Microsoft Knowledge Base article:
931667 How to address time zone changes by using the Time Zone Data Update Tool for Microsoft Office Outlook
Disclaimer This article will be updated as new time zone changes are announced. Customers who want to update the time zone by using registry files must fully test the solution before they deploy it.

Summary

Daylight saving time implementation varies from country to country. Some countries may not observe daylight saving time, whereas other countries may change the start dates and end dates for daylight saving time every year. This article describes how to update Windows to use the latest global time zone rules.

Introduction

In many countries, the start dates and end dates for daylight saving time (DST) change from year to year. Additionally, countries may change their policy of how they recognize daylight saving time, or they may change the local time offset from Coordinated Universal Time (UTC).

This article contains information about how to update the registry in Microsoft Windows to accommodate these kinds of ongoing changes. All computers should be updated to include these time zone updates regardless of whether they are located in a changing time zone. This is because some applications may use the local time zone database to perform date and time calculations for events that occur elsewhere in the world.

Please install the time zone updates as soon as possible. This minimizes the number of Outlook and Exchange meetings or calendar events that are scheduled during the period that will experience changes.

For the latest daylight saving time update for Windows, see the following Microsoft Knowledge Base article:The samples in this article update the global time zone rules that are used in Windows as of December 2011. For more information about how daylight saving time changes may affect other Microsoft products, go to the following Microsoft website:

Updates that have been issued

The following daylight saving time updates have been issued for Windows since 2010.

Note The cumulative updates are rollups of all previous changes. The latest cumulative update is the only one that is required. The old updates do not have to be explicitly installed.


September 2016 update

To download this update, click the following article number to go to the article in the Microsoft Knowledge Base:
3182203  2016 — September 2016 time zone change for Novosibirsk 

Time zone changes

  • Russia

    Russia recently announced that the Novosibirsk region will be moving from UTC +06:00 to UTC +07:00 on July 24 at 02:00. Also, the Omsk time zone has been created for the UTC +06:00 offset. This change affects the following time zones.

    Time zone key nameNew display name
    N. Central Asia Standard Time(UTC+07:00) Novosibirsk
    Omsk Standard Time(UTC+06:00) Omsk
July 2016 update
June 2016 cumulative update
New time zones
Display name changes

Other data corrections

In addition to the recently added and revised information, we have improved the historical data accuracy of 25 existing time zone entries in Windows.

May 2016 cumulative update changes
April 2016 cumulative update changes
December 2015 cumulative update changes
August 2015 cumulative update changes
December 2014 cumulative update changes
August 2014 cumulative update changes
December 2013 cumulative update changes
October 2012 cumulative update changes
December 2011 cumulative update changes
August 2011 cumulative update changes
2011 hotfix releases
December 2010 cumulative update changes
September 2010 cumulative update changes
May 2010 cumulative update changes
March 2010 hotfix changes
February 2010 cumulative update changes

Potential effect on Microsoft Office Outlook calendars

Before you apply the updates that are described in this article, be aware of potential issues that may affect Outlook.

For more information, go to the following Microsoft Knowledge Base article:
931667 How to address time zone changes by using the Time Zone Data Update Tool for Microsoft Office Outlook

More Information

Windows time zone registry information
How to configure the daylight saving time settings
How to verify that the time zone changes have been applied

References

For more information, click the following article numbers to go to the articles in the Microsoft Knowledge Base:
256986 Windows registry information for advanced users
310516 How to add, modify, or delete registry subkeys and values by using a registration entries (.reg) file
100010 What are Control Sets? What is CurrentControlSet?
322756 How to back up and restore the registry in Windows


310516 How to obtain Microsoft support files from online services

How to set the computer time and time zone in Windows Vista

http://windowshelp.microsoft.com/Windows/en-US/Help/549bd2ed-8d98-4b4f-b600-b2fbfdef661f1033.mspx

How to set the time zone in Microsoft Office

http://office.microsoft.com/en-us/outlook/HP052432171033.aspx

Technical revisions

The revision number and review dates for this article may reflect minor editorial or structural revisions to this content. The major technical revisions to this content are listed in this table.

DateRevisions
February 23, 2010Made the following changes:

  • Added the "February 2010 cumulative update changes" section.
  • Replaced the references to Knowledge Base article 976098 with references to Knowledge Base article 979306.
  • Updated registry information for English and non-English builds of Windows.
March 12, 2010Made the following changes:

  • Added the "March 2010 hotfix changes" section.
  • Replaced the references to KKnowledge Base article 979306 with references to Knowledge Base article 981128.
  • Updated registry information for English and non-English builds of Windows.
December 27, 2010Made the following changes:

  • Added the following sections:
    "December 2010 cumulative update changes"
    "September 2010 cumulative update changes"
    "May 2010 cumulative update changes"
  • Replaced the references to Knowledge Base article 981128 with references to Knowledge Base article 2443685.
  • Updated registry information for English and non-English builds of Windows.
August 9, 2011Made the following changes:

  • Added the following sections:
    "August 2011 cumulative update changes"
    Replaced the references to Knowledge Base article 2443685 with references to Knowledge Base article 2570791.
  • Updated registry information for English and non-English builds of Windows.
November 22, 2011Made the following changes:
  • Added the following sections:
    "December 2011 cumulative update changes"
    Replaced the references to Knowledge Base article 2570791 with references to Knowledge Base article 2633952.
Updated registry information for English and non-English builds of Windows.
December 10, 2013Made the following changes:

  • Added the "December 2013 cumulative update changes" section.
  • Changed the "For the latest daylight saving time update for Windows" link to 2904266.
October 15, 2014Made the following changes:

  • Added the "August 2014 cumulative update changes" section.
  • Changed the "For the latest daylight saving time update for Windows" link to 2981580.
January 23, 2014Made the following changes:

  • Added the "December 2014 cumulative update changes" section.
  • Changed the "For the latest daylight saving time update for Windows" link to 3103410.
August 18, 2014Made the following changes:

  • Added the "August 2014 cumulative update changes" section.
  • Changed the "For the latest daylight saving time update for Windows" link to 3077715.
May 13, 2016Made the following changes:

  • Updated the "May 2016 cumulative update changes" section.
  • Changed the "For the latest daylight saving time update for Windows" link to 3153731.
September 7, 2016Made the following changes:

  • Added the "2016 - Egypt cancels DST" section.
September 19, 2016Made the following changes:

  • Added the "September 2016 time zone change for Novosibirsk" section.
Properties

Article ID: 914387 - Last Review: Sep 22, 2016 - Revision: 1

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