UNH CIS Signals
New Daylight Saving Time Fall Back Time Affects Computers

Martin England

Daylight Saving Time (DST) for Eastern US ends on Sunday, November 4, a week later than usual. This change, coupled with the early arrival of DST in March 2007, affects Windows operating systems and also Microsoft Office 2004 for Macintosh.  No updates to Microsoft Outlook are needed. Previously applied patches, specific to Outlook, incorporated the new “fall back time”.

In August 2007, Microsoft released a patch included in Windows Update which will remedy potential issues for the following products: Windows XP, Windows Vista, Microsoft Server 2003, Microsoft Server 2003R2. Chances are if you use one of the above-listed operating systems and have ‘Automatic Updates’ turned on, you received the critical update. The potential issues fixed are modifications to the time zones in Australia, New Zealand, Egypt, and Venezuela.

If you are unsure if you have this update installed, follow these steps:

  1. Open a web browser
  2. Type ‘windowsupdate.microsoft.com’ into the web address field
  3. Choose ‘Review Your Update History’ under the Options menu, in the left pane
  4. Search for Update for Windows [your version here] (KB933360) under the Product column (released on 8/29/07)


To update Microsoft Office 2004 for Macintosh, simply apply the ‘Microsoft Office for Mac 11.3.7 Update,’ available for download at www.microsoft.com.  

For more information, please visit http://cis.unh.edu/dst

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