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Time Zone Issue with Windows Mobile ActiveSync and Google Apps

If I create a calendar event in my Google Apps account (or in Outlook that's connected to my Google Apps account w/ the Google Apps Sync Tool) I get two possible behaviors on my Windows Mobile HTC smart phone:

1. The start and stop times match if I create the event before March 14 (the Daylight Savings Time effective date).
2. The start and stop times are off by one hour if I create the event after March 14.

Suggestions?
0
jdana
Asked:
jdana
1 Solution
 
hjgodeCommented:
Hello

I am not aware of how you use google apps and sync your calendar events, but in general event date/time is handled in UTC (no timezone and no DST).

If you enter a new event the date and time you select for the event is translated to UTC with the current TZ and DST settings to UTC and this universal time is saved in the event. When you open the event in a synced account, the UTC is translated to the TZ and DST settings of the system you are displaying the event. If TZ and DST of one system does not match the other you will see different event time, you will always see the event time with the local settings.

So please check and ensure the DST and TZ settings of both systems you compare when viewing the event. If they dont match, you will get what you describe.

In the past there were several updates for DST times for windows mobile devices. Unfortunately DST times dont match all over the world.

For some background on this read my article at http://www.hjgode.de/wp/2010/10/08/windows-mobile-setsystemtime-and-dst-einsteins-relativity-theory/ which describes an anomaly of SetSystemTime() for programmers.

regards

Josef
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jdanaAuthor Commented:
hjgode,

That was it.  My assistant found an HTC time zone patch, and the issue was fixed.  Thanks for the advice.

J
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