This article describes an update that makes time zone changes and daylight saving time (DST) changes in Windows. 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 Vista SP2
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Windows XP Embedded
Note To get the update for Windows 10, install the latest cumulative updates listed in the Windows 10 update history page.
About this update
Time zone and DST changes
Venezuela
Venezuela advanced its clocks by 30 minutes on May 1, 2016. This change sets Venezuela’s standard time zone offset from "(UTC-04:30) Caracas" to "(UTC-04:00) Caracas."
|
Time zone key name |
Display name |
Old time zone offset |
New time zone offset |
|---|---|---|---|
|
Venezuela Standard Time |
(UTC-04:00) Caracas |
UTC-04:30 |
UTC-04:00 |
Egypt
Egypt has announced that it will observe DST this year starting on Friday, July 8, 2016 at midnight and ending on Friday, October 28, 2016, at midnight.
|
Time zone key name |
Display name |
DST start |
DST end |
|---|---|---|---|
|
Egypt Standard Time |
(UTC+02:00) Cairo |
July 8, 2016, 00:00 |
October 28, 2016, 00:00 |
Magadan, Russia
Russia has moved the Magadan Oblast region from UTC+10:00 to UTC+11:00 on April 24. This update changes the Magadan time zone display to "(UTC+11:00) Magadan."
|
Time zone key name |
Display name |
Old time zone offset |
New time zone offset |
|---|---|---|---|
|
Magadan Standard Time |
(UTC+11:00) Magadan |
UTC+10:00 |
UTC+11:00 |
Tomsk, Russia
Russia moved the Tomsk Oblast region from UTC+06:00 to UTC+07:00 on May 29. This update introduces a Windows time zone for the Tomsk region. After the update is installed, we recommend that users in the new time zone switch to "(UTC+07:00) Tomsk" because this time zone will correctly account for historical time data for this region.
|
Time zone key name |
Display name |
Old time zone offset |
New time zone offset |
|---|---|---|---|
|
Tomsk Standard Time |
(UTC+07:00) Tomsk |
UTC+06:00 |
UTC+07:00 |
Morocco
The DST period for Morocco resumes after the Muslim month of Ramadan (02:00 on Sunday, July 10, 2016, to 03:00 on Sunday, October 30, 2016, in the Gregorian calendar).
|
Time zone key name |
Display name |
DST start |
DST end |
|---|---|---|---|
|
Morocco Standard Time |
(UTC+00:00) Casablanca |
July 10, 2016, 02:00 |
October 30, 2016, 03:00 |
New time zones
The following time zones have been added, either because they are currently unrepresented or because they have a unique history of changes in recent years.
|
Location |
ID/Key |
Display name |
|---|---|---|
|
Aleutian Islands, Alaska |
Aleutian Standard Time |
(UTC-10:00) Aleutian Islands |
|
Marquesas Islands |
Marquesas Standard Time |
(UTC-09:30) Marquesas Islands |
|
Gambier Islands |
UTC-09 |
(UTC-09:00) Coordinated Universal Time-09 |
|
Pitcairn Islands; Tungsten, Canada; Clarion Island, Mexico; Clipperton Island |
UTC-08 |
(UTC-08:00) Coordinated Universal Time-08 |
|
Cuba |
Cuba Standard Time |
(UTC-05:00) Havana |
|
Turks & Caicos Islands |
Turks And Caicos Standard Time |
(UTC-04:00) Turks and Caicos |
|
St. Pierre and Miquelon |
Saint Pierre Standard Time |
(UTC-03:00) Saint Pierre and Miquelon |
|
Tocantins, Brazil |
Tocantins Standard Time |
(UTC-03:00) Araguaina |
|
West Bank and Gaza |
West Bank Standard Time |
(UTC+02:00) Gaza, Hebron |
|
Hovd, Mongolia |
W. Mongolia Standard Time |
(UTC+07:00) Hovd |
|
Tomsk, Russia |
Tomsk Standard Time |
(UTC+07:00) Tomsk |
|
Eucla, Australia |
Australia Central W. Standard Time |
(UTC+08:45) Eucla |
|
Lord Howe Island, Australia |
Lord Howe Standard Time |
(UTC+10:30) Lord Howe Island |
|
Bougainville Island |
Bougainville Standard Time |
(UTC+11:00) Bougainville Island |
|
Norfolk Island |
Norfolk Standard Time |
(UTC+11:00) Norfolk Island |
|
Chatham Islands, New Zealand |
Chatham Island Standard Time |
(UTC+12:45) Chatham Islands |
Display name changes
These changes improve the usability of the existing time zone entries in Windows.
|
Location |
ID/Key |
Old display name |
New display name |
|---|---|---|---|
|
Morocco |
Morocco Standard Time |
(UTC) Casablanca |
(UTC+00:00) Casablanca |
|
United Kingdom |
GMT Standard Time |
(UTC) Dublin, Edinburgh, Lisbon, London |
(UTC+00:00) Dublin, Edinburgh, Lisbon, London |
|
Iceland |
Greenwich Standard Time |
(UTC) Monrovia, Reykjavik |
(UTC+00:00) Monrovia, Reykjavik |
|
Moldova |
E. Europe Standard Time |
(UTC+02:00) E. Europe |
(UTC+02:00) Chisinau |
Note Because of differences in daylight saving time rules, the "(UTC+02:00) Chisinau" entry should be used only in Moldova. In other locations that use Eastern European Time, the time zone should be set to one of the following values, as appropriate:
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(UTC+02:00) Athens, Bucharest
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(UTC+02:00) Beirut
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(UTC+02:00) Cairo
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(UTC+02:00) Damascus
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(UTC+02:00) Helsinki, Kyiv, Riga, Sofia, Tallinn, Vilnius
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(UTC+02:00) Istanbul
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(UTC+02:00) Tripoli
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.
Who should install this update?
We recommend that you install time zone updates on all computers, including both desktops and servers, for all users worldwide regardless of where the computers are physically located. The need for time zone information cannot always be anticipated, or its usage may not be obvious to the user.
While it's important to keep time correctly on a computer’s local clock, consider also that many users interact regularly with users in other time zones through international phone calls and online meetings. Additionally, many Microsoft and third-party applications and services let users select their own time zone. Therefore, the servers that host those applications must have accurate time zone information.
Many other business scenarios also require accurate time zone information. These include coordinating travel itineraries, calculating hourly wages, and automating lighting and machinery.
How to get this update
Important If you install a language pack after you install this update, you must reinstall this update. Therefore, we recommend that you install any language packs that you need before you install this update. For more information, see Add language packs to Windows.
Method 1: Windows Update
This update is provided as an Optional update on Windows Update. For more information on how to run Windows Update, see How to get an update through Windows Update.
Method 2: Microsoft Download Center
The following files are available for download from the Microsoft Download Center.
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Operating system |
Update |
|---|---|
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All supported x86-based versions of Windows 8.1 |
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All supported x64-based versions of Windows 8.1 |
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All supported x64-based versions of Windows Server 2012 R2 |
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All supported x64-based versions of Windows Server 2012 |
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All supported x86-based versions of Windows 7 |
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All supported x64-based versions of Windows 7 |
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All supported x64-based versions of Windows Server 2008 R2 |
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All supported IA-64-based versions of Windows Server 2008 R2 |
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All supported x86-based versions of Windows Vista |
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All supported x64-based versions of Windows Vista |
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All supported x86-based versions of Windows Server 2008 |
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All supported x64-based versions of Windows Server 2008 |
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All supported IA-64-based versions of Windows Server 2008 |
Note The update for Windows RT 8.1 can be downloaded only from Windows Update.
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.
Update detail information
Prerequisites
To apply this update, you must have 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.
Registry information
To apply this update, you don't have to make any changes to the registry.
Restart requirement
You don't have to restart the computer after you apply this update.
Update replacement information
This update doesn't replace a previously released update.
File information
For a list of the files that are provided in this update, download the file information for update 3162835.
References
Learn about the terminology that Microsoft uses to describe software updates.
