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 observation of the Muslim month of Ramadan. On May 21, 2017, clocks will be turned back at 03:00 to 02:00 to end DST observation. We recommend customers using Windows 7.0 and below (and Server 2012 and below) to apply this…

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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 customers are recommended to install the latest cumulative update listed in our update history page. KB 4015193 has more details about this change and how it can be obtained for other versions of Windows.

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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 Saratov. Windows 10 customers are recommended to install the latest cumulative update listed in our update history page. Help page 4012864 has more details about this change and how it can be obtained for other versions of Windows.

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Time Zone Updates for Magallanes (Chile) and Haiti

The government of Chile recently announced that the Magallanes Region and Chilean Arctic will stay on DST indefinitely. On May 14, 2017, mainland Chile will fall back to UTC -04:00 hours while the Magallanes Region and the Chilean Artic will move their offset to UTC -03:00 hours. Microsoft plans to introduce a new time zone…

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Time Zone Updates for Mongolia

The Mongolian government recently announced that they will not be observing DST going forward. DST was previously scheduled to begin on March 25th, 2017. Microsoft is preparing an update to Windows which will reflect this change. We anticipate this update will be made available before March 25th, 2017. We recommend our customers to keep their Windows devices…

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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 are recommended to install the latest cumulative update listed in our update history page. KB 3203884 has more details about this change and how it can be obtained for other versions of Windows.

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Time Zone Updates for Cyprus and Saratov, Russia

Northern Cyprus stopped observing DST from October 30, 2016, remaining in UTC +03:00 hours going forward. The Russian government recently announced that the Saratov region will be moving from UTC +03:00 to UTC +04:00 on December 4, 2016 at 02:00. Microsoft is preparing an update to Windows which will reflect these changes. We anticipate these updates will…

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Time Zone Updates for Tonga

Microsoft has received official decree verifying that Tonga will start observing DST on November 6, 2016 at 02:00 hours. DST in Tonga is scheduled to end on January 15, 2017 at 03:00 hours.  Microsoft is preparing an update to Windows which will reflect these changes. We anticipate this update will be made available in the…

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DST end date change for West Bank and Gaza

Microsoft has received official decree verifying the change in daylight savings end date for West Bank and Gaza regions. It was previously scheduled to end on October 20, 2016 at  24:00. Instead, DST now ends on October 29, 2016 at 01:00. Microsoft is preparing an update to Windows which will reflect these policy changes. We…

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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 article for more details on this update for Windows 8.1, Server 2012 R2 and below. For Windows 10, please install the latest cumulative update (LCU). Details of the LCU can be found here.

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