September 2010 Daylight Saving Time (DST) Cumulative Update
Published Jan 08 2019 02:05 PM 251 Views
Microsoft
First published on TECHNET on Oct 06, 2010

The September Cumulative Update (CU) for DST contains three changes :


For US Eastern Standard time (UTC -5:00, Indiana East), the CU adds DST support and updates history from 2006 through 2009 to reflect the change in which DST is applicable for the whole state and not per-county.  Specifically, for 2005 and earlier, this timezone does not have DST.  For 2006 and beyond, this time zone now contains DST.


For the Middle East standard time, (UTC +2:00 Beirut), the September CU fixes the ambiguity in the DST end-date transition time.  It was the last Sunday in October at 00:00:00:000.  Now its the last Saturday in October at 23:59:59:999.




For the Namibia standard timezone, the September CU updates the display name to reflect that this is a UTC +1:00 timezone, and not a UTC +2:00 timezone.  However, the underlying DST rules and start/end dates have not changed.  We are investigating a request to modify those in  a future CU.



For more information, see the following KB article : http://support.microsoft.com/kb/2158563


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‎Jan 08 2019 02:05 PM
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