Summary
In accordance with recently passed Russian law, the following regions in Russia were scheduled to switch time zones on March 27, 2016, at 02:00 local time. Microsoft has released an update to Windows, dated Tuesday, April 12, 2016, to reflect these changes.
| Region | Old time zone offset | New time zone offset |
|---|---|---|
| Astrakhan Oblast | UTC+3 | UTC+4 |
| Ulyanovsk Oblast | UTC+3 | UTC+4 |
| Altai Krai | UTC+6 | UTC+7 |
| Altai Republic | UTC+6 | UTC+7 |
| Zabaykalsky Krai | UTC+8 | UTC+9 |
| Sakhalin Oblast | UTC+10 | UTC+11 |
Resolution
The update that is described in this article changes the time zone data to accommodate daylight saving time (DST) changes in several countries.
This is a cumulative update rollup that includes all previous Windows time zone changes. For more information about how DST changes may affect other Microsoft products, go to the following Microsoft websites:
914387 How to configure daylight saving time for Microsoft Windows operating systems
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.
Update information
How to get this updateThe following files are available for download and installation from the Microsoft Download Center.
| Operating system | Update |
|---|---|
| All supported x86-based versions of Windows 8.1 |
Download the package now. |
| All supported x64-based versions of Windows 8.1 |
Download the package now. |
| All supported x64-based versions of Windows Server 2012 R2 |
Download the package now. |
| All supported x64-based versions of Windows Server 2012 |
Download the package now. |
| All supported x86-based versions of Windows 7 |
Download the package now. |
| All supported x64-based versions of Windows 7 |
Download the package now. |
| All supported x64-based versions of Windows Server 2008 R2 |
Download the package now. |
| All supported IA-based versions of Windows Server 2008 R2 |
Download the package now. |
| All supported x86-based versions of Windows Vista |
Download the package now. |
| All supported x64-based versions of Windows Vista |
Download the package now. |
| All supported x86-based versions of Windows Server 2008 |
Download the package now. |
| All supported x64-based versions of Windows Server 2008 |
Download the package now. |
| All supported IA-based versions of Windows Server 2008 |
Download the package now. |
For 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 get Microsoft support files from online services Virus-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.
PrerequisitesWindows 8.1 and Windows Server 2012 R2
To apply this update, you must have update 2919355 installed. For more information about how to get this update, click the following article number to go to the article in the Microsoft Knowledge Base:
2919355 Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 update: April 2014 Windows 8 and Windows Server 2012
No prerequisites are required to apply this update.
Windows 7 and Windows Server 2008 R2
No prerequisites are required to apply this update. The same package installs both on the RTM version and the Service Pack 1 versions of Windows 7 and Windows Server 2008 R2. For more information about how to get a Windows 7 or a Windows Server 2008 R2 service pack, click the following article number to go to the article in the Microsoft Knowledge Base:
976932 Information about Service Pack 1 for Windows 7 and for Windows Server 2008 R2 Windows Server 2008
To apply this update, you must be running Windows Vista Service Pack 2 (SP2) or Windows Server 2008 SP2.
For more information about how to get a Windows Server 2008 service pack, click the following article number to go to the article in the Microsoft Knowledge Base:
968849 How to get the latest service pack for Windows Server 2008
Registry informationTo apply this update, you don't have to make any changes to the registry.
Restart requirementYou must restart the computer after you install this cumulative update.
Changes to Windows time zone data
This update includes the following changes and additions. Users in the affected regions can switch to these new time zones after the update is installed.
New Time Zones
Astrakhan Oblast & Ulyanovsk Oblast
| Time zone key / ID | Astrakhan Standard Time |
|---|---|
| English display name | (UTC+04:00) Astrakhan, Ulyanovsk |
| Time zone offset (before transition) | UTC+3 |
| Time zone offset (after transition) | UTC+4 |
Altai Republic & Altai Krai
| Time zone key / ID | Altai Standard Time |
|---|---|
| English display name | (UTC+07:00) Barnaul, Gorno-Altaysk |
| Time zone offset (before transition) | UTC+6 |
| Time zone offset (after transition) | UTC+7 |
Zabaykalsky Krai
| Time zone key / ID | Transbaikal Standard Time |
|---|---|
| English display name | (UTC+09:00) Chita |
| Time zone offset (before transition) | UTC+8 |
| Time zone offset (after transition) | UTC+9 |
Sakhalin Oblast
| Time zone key / ID | Sakhalin Standard Time |
|---|---|
| English display name | (UTC+11:00) Sakhalin |
| Time zone offset (before transition) | UTC+10 |
| Time zone offset (after transition) | UTC+11 |
Changes to Existing Time ZonesThese changes affect the display name only. No time changes will be introduced.
| Time zone key / ID | Old display name | New display name |
|---|---|---|
| Kaliningrad Standard Time | (UTC+02:00) Kaliningrad (RTZ 1) | (UTC+02:00) Kaliningrad |
| Russian Standard Time | (UTC+03:00) Moscow, St. Petersburg, Volgograd (RTZ 2) | (UTC+03:00) Moscow, St. Petersburg, Volgograd |
| Russia Time Zone 3 | (UTC+04:00) Izhevsk, Samara (RTZ 3) | (UTC+04:00) Izhevsk, Samara |
| Ekaterinburg Standard Time | (UTC+05:00) Ekaterinburg (RTZ 4) | (UTC+05:00) Ekaterinburg |
| North Central Asia Standard Time | (UTC+06:00) Novosibirsk (RTZ 5) | (UTC+06:00) Novosibirsk |
| North Asia Standard Time | (UTC+07:00) Krasnoyarsk (RTZ 6) | (UTC+07:00) Krasnoyarsk |
| North Asia East Standard Time | (UTC+08:00) Irkutsk (RTZ 7) | (UTC+08:00) Irkutsk |
| Yakutsk Standard Time | (UTC+09:00) Yakutsk (RTZ 8) | (UTC+09:00) Yakutsk |
| Vladivostok Standard Time | (UTC+10:00) Vladivostok, Magadan (RTZ 9) | (UTC+10:00) Vladivostok |
| Russia Time Zone 10 | (UTC+11:00) Chokurdakh (RTZ 10) | (UTC+11:00) Chokurdakh |
| Russia Time Zone 11 | (UTC+12:00) Anadyr, Petropavlovsk-Kamchatsky (RTZ 11) | (UTC+12:00) Anadyr, Petropavlovsk-Kamchatsky |
File informationFor a list of the files that are provided in this update, download the file information for update 3148851.
References
For an official policy statement about these changes, see the following Microsoft Daylight Saving Time & Time Zone Blog article:
Time Zone Updates for Russia For general Windows support for time zone and daylight saving time issues, go to the following Microsoft website: