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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