Notice: A hotfix is available to update Windows DST support for Egypt, Chile and Morocco

This hotfix contains three new changes in Windows Daylight Saving Time support :

  • The government of Egypt decided to cancel Daylight Saving Time. 
    • This hotfix updates Windows (UTC +2:00) Cairo timezone so it no longer has DST support.
  • The government of Chile extended 2011 Daylight Saving Time so it ends May 7th.
    • This hotfix updates Windows DST support for (UTC -4:00) Santiago.
  • The government of Morocco changed 2011 Daylight Saving Time to end July 30th at midnight.
    • This hotfix updates Windows DST support for (UTC) Casablanca.

For more information, or to download this hotfix, see


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