at about 7 or 8 in the morning (the reason being that the day and date change between 11:30 and 2:30am and the moonphase between 12 and 12:30pm). Pull the crown out and change the time through midnight to advance the day of the week (this is the only criticism I ever had of mine). Then, after setting the correct day and time, push the 4 o'clock corrector to advance the date, then the 2 o'clock corrector for the month, and lastly the 8 o'clock pusher for the moonphase. With the moonphase, set it to "full" moon, then advance it one depression of the corrector for every day SINCE the last full moon.
-Dean