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Hi,
Have you checked that the GPS setting is activated? When the time setting is on Automatic the watch derives the time and date based on the GPS position signals it receives from the satellites.
If you have got the GPS enabled and the time is wrong try the suggestions in the troubleshooting section on p.14 of the user guide regarding ''Improving GPS Satellite Reception'' and ''Acquiring Satellite Signals '' and see if this solves your problem.
Here is a link to the User Guide.
http://static.garmin.com/pumac/Forerunner_630_OM_EN.pdf
If that doesn't work check to see if there are any software updates available or perhaps you can try reinstalling the software version that you are using now, in case it has been corrupted.
Here is a link describing the procedure. '''See the Note regarding using Garmin Express'''
http://www8.garmin.com/support/download_details.jsp?id=9922