When you go to set the time, there is a Sync button that sets the time to the proper minutes per GPS and the nearest hour to the current clock.
I haven't noticed time errors since, so maybe it continues to keep synced via GPS?
I guess tomtom felt it didn't want to assume timezones for their users (eg if someone lived at a border), so it allowed that level of customization.
My sync button shows on the lower left of the clock set screen (when you set the hours/minutes up and down).
The sync button doesn't show if tomom has 0 bars satellite signal. Maybe you tried to set the time just after turning tomtom on, and it hadn't acquired a signal yet?
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