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:

  • Windows Server 2012 R2

  • Windows 8.1

  • Windows RT 8.1

  • Windows Server 2012

  • Windows Embedded 8

  • Windows Server 2008 R2 Service Pack 1 (SP1)

  • Windows 7 SP1

  • Windows Server 2008 Service Pack 2 (SP2)

  • Windows Vista SP2

  • 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:

  • (UTC+02:00) Athens, Bucharest

  • (UTC+02:00) Beirut

  • (UTC+02:00) Cairo

  • (UTC+02:00) Damascus

  • (UTC+02:00) Helsinki, Kyiv, Riga, Sofia, Tallinn, Vilnius

  • (UTC+02:00) Istanbul

  • (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.

Operating system

Update

All supported x86-based versions of Windows 8.1

Download Download the package now.

All supported x64-based versions of Windows 8.1

Download Download the package now.

All supported x64-based versions of Windows Server 2012 R2

Download Download the package now.

All supported x64-based versions of Windows Server 2012

Download Download the package now.

All supported x86-based versions of Windows 7

Download Download the package now.

All supported x64-based versions of Windows 7

Download Download the package now.

All supported x64-based versions of Windows Server 2008 R2

Download Download the package now.

All supported IA-64-based versions of Windows Server 2008 R2

Download Download the package now.

All supported x86-based versions of Windows Vista

Download Download the package now.

All supported x64-based versions of Windows Vista

Download Download the package now.

All supported x86-based versions of Windows Server 2008

Download Download the package now.

All supported x64-based versions of Windows Server 2008

Download Download the package now.

All supported IA-64-based versions of Windows Server 2008

Download Download the package now.

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.

Need more help?

Expand your skills
Explore Training
Get new features first
Join Microsoft Insiders

Was this information helpful?

What affected your experience?

Thank you for your feedback!

×