How to adjust clock with no buttons ?

I know I've had the clock on my '01 reset to 12:00 when the 12 volt battery has been unavailable. At least one of those was "left the dome light on all night", and at least one of those was "disconnected the 12 V battery while working on other things". That's why I made the suggestion.

When I had the 12 V battery disconnected, it may have been longer than the 10 minutes I mentioned in my original post. But I know that the clock will eventually go back to 12:00 if you leave the 12 V battery disconnected long enough.