Welcome to the Forum.
Good you found it; but there is logic to the menu. Across the menu to the "wrench" page 1, down to date adjustment, right to enter date adjustment,Then you can change the date format/24 or 12 hour time, down to date -right to change, date, left each time to get back to the date adjustment page, last item is time, left to exit time, then down to settings complete and click ok, then menu to exit. The green "arrows" show you there is more to do or to exit/change the value.
You change the date the same way as you set it the first time.