Following as my 2010 Civic EX GT clock was an hour out at the beginning of this year, disconnected battery and now clock is completely screwed as it started upon power up it went to 01:00. So I am thinking that a temporary workaround will be to disconnect battery at this time.
Poking around the Sat NAV menu I did look at clock adjustment but nothing seemed to change clock, although WET Time is always showing 00:00 (not sure what this is).
It marks you 00:00 because it does not synchronize with the sat nav. There It must put the time of sat nav. If you want to set the clock on your car:
1-go to a covered parking.
2-Turn off the car.
3-Put the contact
4-Enter the secret menu with the 3 buttons at the same time (map + menu + exit)
5-set the clock and date of the sat nav manually in send gps time.
6-Exit the secret menu and enter the configuration clock setting in the normal menu. If the time appears instead of 00:00, try to set the time to the correct one. If it doesn't work, turn off and put the contact back on. At some moment the time has to appear instead of 00:00
7-remove the key from the ignition, close and open the car and check the time again.
8-surely when you go out the clock changes the time. You will have to set or remove summer time. I have deactivated the automatic time slot.
That way I have the correct hira in the car.