![]() A new Windows time zone entry will be created only when a country or region (including dependencies), or a first-order administrative division of a country or region (state, province, department, and so on), has a separate and distinct history of UTC offsets and DST rules from existing TZ entries. Microsoft will introduce a new time zone for such scenarios. or- New DST or TZ change that does not match the exact parameters of another TZ, including historical time data accuracy (from 2010). A new time zone is required for the affected users within that region because the existing time zone has to remain unchanged for the rest of the users. Windows 10 update history Windows 8.1 and Windows Server 2012 R2 update history Windows 7 SP1 and Windows Server 2008 R2 SP1 update history Windows Server 2012 update history Windows Server 2008 SP2 update history Microsoft DST and TZ support policy Change typeĪ subset of the region that shares a time zone makes a change to its DST requirements or changes the time bias of its time zone. You can find more information about our monthly rollup releases here: Monthly rollupsĭST updates are also included in monthly rollup releases. This allows a consistent means for customers and partners to be informed whenever such an update is made available. It also includes a short summary of the content that is included in each update. KB 914387 provides a list of DST updates that have been released. Concentrated efforts to promote the change to affected citizens.Official published confirmation of planned changes to DST or time zones.Ample advance notice (one year or more) of the planned change.In order for Microsoft to provide an update at the earliest and ensure a seamless transition to new DST and TZ policies, Microsoft recommends that governments provide the following: Each DST and TZ update that is released through WU will have the latest time data and will also supersede any previously issued DST and TZ update. Microsoft makes an effort to incorporate these changes to Windows, and publishes an update through Windows Update (WU). To make sure that Windows has the latest and most accurate time data, Microsoft continuously monitors DST and TZ changes that are announced by governments around the world. Many applications and cloud services reference the underlying Windows operating system for daylight saving time (DST) and time zone (TZ) information. Subscribe to the Microsoft Daylight Saving Time & Time Zone Blog to receive the latest updates on changes around the world.Īpplies to: Windows 10 - all editions Original KB number: 22803 Microsoft policy in response to daylight saving time and time zone changes
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