a mnemonic for adjusting your watch (if it has a day date)

There is only one danger point and that is the period when the date is changing. Its typically when the hour hand is between the 9 and 3 point on the dial (in the PM). During this time:

• do not wind the hands backwards when adjusting the time
• do not adjust the date.

this is true even of analog quartz.You can find out if its set to AM or PM by pulling the crown out to the second dent (you may not feel the first) and winding it forwards and watching the date and observe when it changes according to the hour hand. This should be PM (because you want the date to change while sleeping and around midnight right?) The rule to use is simply:

think clockwise ... its wise to wind the hands only in the clockwise manner.

It really doesn't matter if you have a Quartz watch like this:

or an automatic like these:

it will have a mechanical system for clicking that day and date display over to the next day date. This is inside the old Sports 100 divers I have (which is a quartz watch).

Its not just my view either:

so be aware and don't fuck up your watch