At first, we would like to remind you of one thing. Your watch operates on a 12-hour dial, and so the calendar date changes once every 24 hours, which means there are 2 rotations (AM and PM) during a day. The easiest way to adjust the date will be to verify if it's noon (still the same day) or midnight (the date will change). It is important to set your time right at AM or PM if you want to have an accurate time.
If you have any other questions regards it, don't hesitate to get back to us at email@example.com.