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Microsoft Support Policy for Daylight Saving Time or Time Zone Changes

Daylight Savings Time (DST) and Time Zone (TZ) updates are important because unless they are applied, the time zone setting for a computer’s clock and calendar, as well as the recorded and reported timestamps may be incorrect. The Microsoft Support Lifecycle policy enables all Microsoft customers to obtain these broadly distributed DST or TZ updates and help ensure their computer’s time information is accurate.

General distribution DST or TZ releases
These are intended for broad consumption and made available via Microsoft and/or Windows Update two times every calendar year in the northern hemisphere's fall and winter. These updates are available at no charge for products in the Mainstream or Extended Support Phase of the Support Lifecycle.
Out-of-cycle DST or TZ releases
DST or TZ updates outside of the general distribution will be considered on a case by case basis. Customers may contact their Technical Account Manager or Microsoft Account Representative for more information.

The Microsoft Support Lifecycle (MSL) policy provides transparent, predictable information regarding the support lifecycle of Microsoft products. More information is available on the MSL web site: http://support.microsoft.com/lifecycle.

Last Review : March 15, 2013