Microsoft Daylight Saving Time & Time Zone Blog

This is the blog maintained by staff at Microsoft to provide general information, announcements and provide answers to Frequently Asked Questions (FAQs) related to daylight saving time (DST) and time zone (TZ) changes around the world.* Important Notice

DST Blog moved to new blog site

The DST blogs have been moved to a newer blog site...

Author: Win DST Date: 02/07/2019

Timezone update for Qyzylorda, Kazakhstan

Microsoft is aware of the time zone change for Qyzylorda region of Kazakhstan. Qyzylorda will...

Author: Win DST Date: 12/21/2018

Time zone updates for Kingdom of Morocco and Volgograd, Russia are available

The November 2018 update addresses Daylight Standard Time (DST) changes for the Kingdom of Morocco...

Author: Win DST Date: 11/28/2018

Time zone update for Metlakatla, Alaska, USA

Microsoft is aware of the time zone change for the Metlakatla community in Alaska, USA. The citizens...

Author: Win DST Date: 11/09/2018

Time zone update for the Kingdom of Morocco

Microsoft is aware of the upcoming time zone change for the Kingdom of Morocco. Morocco will remain...

Author: Win DST Date: 10/26/2018

Time zone updates for Republic of Chile

Microsoft is aware of the following change in Daylight Saving Time (DST) for the Republic of Chile...

Author: Win DST Date: 10/26/2018

DST update for Fiji is now available

The October 2018 Update addresses the DST changes for Fiji where the DST end date has been pulled in...

Author: Win DST Date: 10/26/2018

Time zone updates for Volgograd Oblast, Russia

Microsoft is aware of the time zone change for Volgograd Oblast, Russia. Volgograd will permanently...

Author: Win DST Date: 10/11/2018

Time Zone Updates for North Korea

Microsoft is aware of the following time zone change for which Windows Updates will be made...

Author: Win DST Date: 05/04/2018

Windows Time data update for Brazil, Morocco, and São Tomé and Príncipe are now available

This update addresses the recently announced changes in Brazil, Morocco, and São Tomé and Príncipe....

Author: Win DST Date: 04/24/2018

Time Zone updates for Morocco, Brazil, São Tomé & Príncipe and West Bank & Gaza

Microsoft is aware of the following time zone changes for which Windows Updates will be made...

Author: Win DST Date: 03/30/2018

Windows Time Data Update for Namibia and Turks & Caicos now available

This update addresses the recently announced  changes in the Republic of Namibia and the Turks &...

Author: Win DST Date: 02/21/2018

Windows Time Data Update for Sudan, Tonga and Northern Cyprus is now available

This update addresses the recently announced  changes in the Republic of the Sudan, the Kingdom of...

Author: Win DST Date: 12/12/2017

Windows Time Data Update for Fiji is now available

This update addresses the recently announced  changes in Republic of the Fiji Islands. They will end...

Author: Win DST Date: 11/28/2017

Time Zone Updates for Fiji, Cyprus, Sudan, Tonga, Namibia and Turks & Caicos

Microsoft is aware of the following time zone changes which will take effect over the next few...

Author: Win DST Date: 10/25/2017

Windows Time Data Updates for Morocco and Haiti is now available

As it has in previous years, Morocco suspended its daylight saving time (DST) period for the...

Author: Win DST Date: 06/27/2017

Windows Time Data Updates for Morocco DST is now available

As it has in previous years, Morocco is suspending its daylight saving time (DST) period for the...

Author: Win DST Date: 05/18/2017

Windows Time Data Updates for Magallanes (Chile) is now available

This update addresses the recent time zone changes in Magallanes region of Chile. Windows 10...

Author: Win DST Date: 04/18/2017

Windows Time Data Updates for Tonga, Northern Cypress, Mongolia and Saratov (Russia) is now available

This update addresses the recent time zone changes in Tonga, Mongolia, Northern Cypress and Russian...

Author: Win DST Date: 03/21/2017

Time Zone Updates for Magallanes (Chile) and Haiti

The government of Chile recently announced that the Magallanes Region and Chilean Arctic will stay...

Author: Win DST Date: 03/15/2017

Time Zone Updates for Mongolia

The Mongolian government recently announced that they will not be observing DST going forward. DST...

Author: Win DST Date: 02/13/2017

Windows Time Data Updates for West Bank and Gaza is now available

This update addresses the recent DST end date changes for West Bank and Gaza. Windows 10 customers...

Author: Win DST Date: 12/13/2016

Time Zone Updates for Cyprus and Saratov, Russia

Northern Cyprus stopped observing DST from October 30, 2016, remaining in UTC +03:00 hours going...

Author: Win DST Date: 11/30/2016

Time Zone Updates for Tonga

Microsoft has received official decree verifying that Tonga will start observing DST on November 6,...

Author: Win DST Date: 10/28/2016

DST end date change for West Bank and Gaza

Microsoft has received official decree verifying the change in daylight savings end date for West...

Author: Win DST Date: 10/21/2016

Time data update for Turkey is now available for Windows 8.1 and below

This addresses the recent DST changes announced by the Turkish government. Please visit the KB...

Author: Win DST Date: 10/18/2016

Windows Time Data Updates for Turkey is now available for Windows 10

Windows 10 customers are recommended to install the latest cumulative update listed in our update...

Author: Win DST Date: 10/11/2016

Windows Time Data Updates for Novosibirsk is now available

Please visit the KB article for more details on this update for Windows 8.1, Server 2012 R2 and...

Author: Win DST Date: 09/22/2016

Time Zone Updates for Turkey

The Turkish government recently announced that they will not be observing DST going forward. They...

Author: Win DST Date: 09/19/2016

Windows Time Data Update for Egypt DST change now available

Please visit the KB article for more details on this update for Windows 8.1, Server 2012 R2 and...

Author: Win DST Date: 08/16/2016

Time Zone Updates for Novosibirsk, Russia

The Russian government recently announced that the Novosibirsk region will be moving from UTC +06:00...

Author: Win DST Date: 07/12/2016

Time Zone Updates for Egypt: DST Cancellation

The government of Egypt recently canceled DST permanently. DST was previously scheduled to begin on...

Author: Win DST Date: 07/06/2016

Windows Time Data Update for June 2016 now available

Please visit the KB article for more details on this update for Windows 8.1, Server 2012 R2 and...

Author: Win DST Date: 06/15/2016

Introducing New Windows Time Zones

Our mission at Microsoft is to empower every person and every organization on the planet to achieve...

Author: Win DST Date: 06/02/2016

Windows Update now available for Azerbaijan, Chile and Haiti time zone changes

Please visit the KB article for more details on this update for Windows 8.1, Server 2012 R2 and...

Author: Win DST Date: 05/20/2016

Time Zone Updates for Egypt

The Egyptian government recently announced that they will be observing DST from Friday, July 8th,...

Author: Win DST Date: 05/20/2016

Time Zone Update for Tomsk, Russia

The Russian government recently announced that the Tomsk region will be moving from UTC +06:00 to...

Author: Win DST Date: 05/10/2016

Time Zone Updates for Venezuela

The government of Venezuela recently announced that they will be advancing their clocks forward by...

Author: Win DST Date: 04/20/2016

Time Zone Updates for Magadan Oblast, Russia

The Russian government recently announced that Magadan Oblast will be moving from UTC +10:00 hours...

Author: Win DST Date: 04/11/2016

Time Zone Update for Chile and Haiti

The government of Chile recently announced that they will be returning to standard time this year....

Author: Win DST Date: 03/23/2016

Time Zone Update for Azerbaijan

The government of Azerbaijan recently announced that they will not be observing DST this year. DST...

Author: Win DST Date: 03/22/2016

Time Zone Updates for Russia

In accordance with recently passed Russian law, the following regions in Russia will switch time...

Author: Win DST Date: 03/15/2016

Cumulative Windows DST Update made available in December 2015

Microsoft released a cumulative Windows Update for all supported versions of Windows in December...

Author: Win DST Date: 01/04/2016

Upcoming Windows DST Update for Turkey, Democratic People's Republic of Korea and Fiji

Microsoft is preparing an update to address recent time zone data changes in Turkey, Democratic...

Author: Win DST Date: 10/09/2015

August 2015 Cumulative Update for Windows Operating Systems is now availabe

The August 2015 DST Cumulative Update for Windows Operating Systems is now available. For more...

Author: Win DST Date: 08/20/2015

Upcoming Windows DST Update for Democratic People's Republic of Korea

Democratic People's Republic of Korea just announced that it will implement its own time zone...

Author: Win DST Date: 08/07/2015

Update for Morocco 2015 Ramadan End is Now Available

Please find the hotfix update to address Morocco 2015 Ramadan End scenario here:...

Author: Win DST Date: 06/22/2015

[Updated] Prepare for 2015 Morocco Ramadan DST Change

KB 3062740 and KB 3062741 were released last month to address this year's Ramadan DST change in...

Author: Win DST Date: 06/10/2015

Update for Mexico, Mongolia and Iran DST change is now available

Please download the update from https://support.microsoft.com/en-us/kb/3049874/.

Author: Win DST Date: 03/25/2015

Upcoming Windows DST Updates for Mexico, Mongolia and Iran

Microsoft is preparing an update to address recent time zone data changes in Mongolia, and correct...

Author: Win DST Date: 03/18/2015

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