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

  • The government of Israel extended Daylight Saving Time to a period of 193 days. 
    • Starting 2013, DST in Israel will now begin on the Friday before the last Sunday in March, and it will end on the first Sunday after October 1. If the end of DST falls on Rosh Hashanah, the Jewish New Year, DST will end on the first Monday after October 1
  • The government of Libya decided to start observing Daylight Saving Time. 
    • In 2013, DST will start on the last Friday of March and end on Last Friday of October. On November 10, 2012, clocks were turned back by 1 hour to UTC+1.
    • A new dedicated time zone has been added for Libya in this update, which is (UTC+1:00 Tripoli).

For more information, or to download this hotfix, see http://support.microsoft.com/kb/2794119