Meetings are moved back one hour in an Exchange 2003 organization

Don’t panic, its not related to DST2007


Source: http://support.microsoft.com/default.aspx?scid=kb;en-us;931222

Meetings are moved back one hour in an Exchange 2003 organization if the meetings are scheduled between September 16, 2006, and October 7, 2006

This problem occurs because the old algorithm for the Jerusalem (GMT + 02:00) time zone sets the standard time to the first Sunday in October. Israel daylight saving time and standard time transitions changed for the year 2006. A new algorithm is being used that has the following rules:

  • Move to daylight saving time at 2:00 A.M. on the last Friday before April 2.
  • Move to standard time at 2:00 A.M. on the Sunday before the tenth day of the Jewish month of Tishrei.

Note The decision to move back to standard time according to the Jewish calendar makes sure that the transition will always occur on Saturday night between Rosh Hashana and Yom Kippur.

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