This update introduces a Windows time zone for the Tomsk region. 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. In other locations that use Eastern European Time, the time zone should be set to one of the following values, as appropriate:.
In addition to the recently added and revised information, we have improved the historical data accuracy of 25 existing time zone entries in Windows. Chile Chile will return to standard time this year. Clocks will be set back by an hour at midnight on Sunday, May 15, and be set ahead an hour at midnight on Sunday, August Haiti Haiti will not observe DST in The planned time change on Sunday, March 13, , is canceled.
Note Easter Island and Haiti are new time zones. Changes to Existing Time Zones These changes affect the display name only. No time changes will be introduced. Turkey Turkey will end DST two weeks later than usual for Clocks will turn back one hour from to on Sunday, November 8, This time zone will observe the following DST rules:. Clocks will be set forward from to on November 1, , and be set backward from to on Sunday, January 17, No DST change will be observed.
Iran Standard Time Iran follows the Persian calendar. Montevideo Standard Time On June 30, , the Uruguayan government decided to abolish the observance of daylight saving time. This put the country into the UTC time zone all year round. The following DST rules will be observed. Russia time zones: Russia announced that it would change its existing time zones on October 26, This change included seven updated time zones, three new time zones, and two existing time zones that merged into one.
Fiji Standard Time: Fiji announced that the country's new daylight saving time DST schedule would start on November 2, and end on January 18, During the time of Ramadan, DST will be interrupted and from July 20 to August 19, , time will be turned back to standard time. The transitions reflecting the start and end of Ramadan are and can be installed via Fix it solutions provided in Microsoft Knowledge Base article. The history correction has also been included in CU As a result of Russia canceling DST and staying on permanent "summer time," the entire calendar was updated to summer time.
This update changes the calendar to show winter time before March 27, while DST was still in effect. DST will start at A.
Kaliningrad Standard Time: As previously announced in Microsoft Knowledge Base article , Belarus has decided to discontinue daylight saving time from and stay on permanent "summer time. This windows update makes the move permanent by including Minsk in the display name for Kaliningrad standard time. This time zone does not observe Daylight Saving. Prior to the August cumulative DST update, Microsoft released the following individual hotfixes in These are rolled up in the latest cumulative update and do not have to be explicitly installed.
This is a display name update only. These changes take effect starting in This is provided to address cases in which fix it solutions for temporary DST changes were only partially applied. Kamchatka Standard Time Removes the separate Kamchatka timezone. Kamchatka is now served by the Magadan timezone. Introduces DST. Windows stores time zone information in two locations in the registry.
The first location is the time zone database in the following registry subkey:. Windows and other applications use the data to calculate local times. The second location for time zone information is the following registry subkey:. Control sets in Windows store system configuration information such as drivers and services.
The TimeZoneInformation registry subkey in the current control set contains the configuration data for the time zone that Windows is currently using. Windows copies this information from the time zone database when the time zone is selected. When the time zone information is changed, both locations in the registry must be updated. The database must be updated to make sure that Windows and other applications have the most accurate time zone information available.
Additionally, the TimeZoneInformation registry subkey in the current control set must be reloaded to make sure that the time zone information is the same as the information that is in the time zone database. We recommend that you update the ti me zone database first. Then, reload the TimeZoneInformation registry key. This procedure forces Windows to read the updated information in the database. The two methods that are explained in this article use this approach.
This article provides the following methods to update the time zone database and to reload the TimeZoneInformation registry key to force Windows to read the updated information in the database.
Method 1: Change the time zone setting on multiple networked computers. Method 2: Change the time zone setting on a single computer.
Important Microsoft strongly recommends that you use Windows Update or that you download the time zone update from the Microsoft download site instead of manually editing the registry. Manual edits of the registry are risky and are prone to errors. These alternative instructions for how to configure the registry are provided for legacy purposes only. Before you make any changes to the time zone settings, export the registry subkeys that are used for Windows time zones.
Then, you can restore the time zone registry subkeys to their original state if it is necessary. Click Start , click Run , type regedit , and then press Enter. Click Start , click Run , type notepad , and then press Enter.
In the Files of type box, click All Files. Copy and paste the following line to the beginning of the file immediately after the line "Windows Registry Editor Version 5.
The import process then uses the rest of the file to re-create the registry subkey and to populate it with the default values. In the Save as type box, click All Files. Click OriginalTZDatabase.
Click Start , click Run , type cmd , and then press Enter. Locate where you saved the OriginalTZDatabase. Copy and paste the following line to the beginning of the file immediately after the line Windows Registry Editor Version 5. To change the time zone settings on multiple networked computers, create and then import a registry file that contains all the updated time zone registry changes. Then, use Group Policy or another distribution mechanism to deploy the registry file to the computer.
To do this, follow these steps. Important This section, method, or task contains steps that tell you how to modify the registry. Skip to main content. This browser is no longer supported. Download Microsoft Edge More info.
Contents Exit focus mode. This normalization is depicted in the following figure. On the attendee's computer, Outlook calculates the intended local time of the meeting based on the information that is included the meeting request:. Pacific Time. On the attendee's computer, Outlook normalizes the time of the meeting based on the Windows global time zone database on the attendee's computer to determine the UTC time.
On the attendee's computer, Outlook converts UTC to the local computer time by using the Windows current time zone settings. This equates to 10 A. Eastern Time, attendee's local computer time, and this is the time for which the meeting is scheduled on the attendee's calendar. One core issue is that if you do not select Automatically adjust clock for Daylight Saving Time on the attendee's computer, there can be a mismatch in the UTC offset off by one hour between the time zone rules in the Windows global time zone database and the Windows current time zone settings.
To select Automatically adjust clock for Daylight Saving Time , select Change time zone in the Date and Time dialog box to display the Time Zone Settings dialog box Screen shot for this step is listed below.
For more information about how to manage daylight saving time and time zone configurations and updates, see Daylight Saving Time Help and Support Center. Skip to main content. This browser is no longer supported. Change your time zone When you change the time zone setting in Outlook, all Calendar views are updated so that they display the new time zone, and all Calendar items reflect the new time zone.
Click the File tab. Click Options. In the Time zone list, click the time zone that you want to use. Notes: When you adjust time zone and daylight saving time settings in Outlook, Windows clock settings are also adjusted. In the Time zone list, click the time zone that you want to add. When you have two or three time zones displayed in Calendar, you can swap their positions.
Under Time zones , click Swap Time Zones. Change your time zone When you change the current time zone, all Calendar views are updated so that they display the new time zone, and all Calendar items are moved so that they reflect the new time zone.
On the Tools menu, click Options. Click Calendar Options. Click Time Zone. Notes: All-day events are also moved to adjust to a change of time zone. Select the Show an additional time zone check box. In the Label box, type a name for the additional time zone. When you have two time zones displayed in Calendar, you can swap their positions to suit you.
Click Swap Time Zones. Clear the Show an additional time zone check box. Need more help? Expand your skills. Get new features first. Was this information helpful? Yes No. Thank you!
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