How to adjust date, time, alarm time on basic digital watch with 4 buttons

How to adjust date, time, alarm time on basic digital watch with 4 buttons. Also see how to change 24 hour time format to 12 hour format. How to check alarm time set on your digital watch? How to turn alarm on or off on a basic digital watch? Wanna buy digital watches? Explore digital watches here: https://amzn.to/3Hr9NKI