There’s something I’ve always wondered about mechanical watches with a date. Does advancing the date start you of in the “AM” or does it stay in whichever half of the day AM/PM you were already in? I’ve been advancing the date by turning the hands to ensure I know which half of the day it’s set to, but maybe this isn’t necessary? Sorry if my question isn’t worded very well.
This might not apply to all movements, but generally the hands indicate 12hr time in relationship to a 24hr basis that’s connected to the date indicator. Meaning, if you have the watch set to 6pm on one day, then quick-set the date to the next, it will indicate 6pm on that next day.