Knowledgebase: Windows Mobile 5
Switching Time Zones on Windows Mobile Devices
Posted by - NA - on 06 July 2009 01:24 PM
Windows Mobile 5:

If you have changed the time zone on your Windows Mobile device, NotifyLink will continue to use the previous time zone until you perform a soft-reset. 

Workaround:

After switching time zones on the device, perform a soft-reset.