Symptoms
The government of Chile extended DST for 2013 to end on April 27, 2013, and start on September 7, 2013 [Official Decree]. This hotfix updates Windows DST support for the (UTC -4:00) Santiago time zone so that DST ends on April 27, 2013, at 23:59:59.999 and the clock reverts to 23:00:00.000. The update also includes the change for DST to start on September 7, 2013, at 23:59:59.999 and the clock to advance to 01:00:00.000 of September 8.
Resolution
This hotfix is also available at Microsoft Update Catalog.
A supported hotfix is now available from Microsoft. To obtain the hotfix, click the link at the top of this page, or contact Microsoft Customer Support Services. For a complete list of Microsoft Customer Support Services telephone numbers and information about support costs, go to the following Microsoft website:
http://support.microsoft.com/contactus/?ws=support
In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.
Note: This update is available only as a hotfix.
More Information
For more information about this change, see the following Microsoft Spanish-language website:
http://www.microsoft.com/chile/cambiodehora/
For more information about the impact of this change (including how to configure Outlook), see the following Microsoft CTS LATAM Team blog:
http://blogs.technet.com/b/latam/archive/2013/02/22/chile-dst-2013-fallback.aspx
