Now, scroll down to the Clock style or Clock format section. You might need to tap on Lock screen or Home screen to find it. Once you're there, select the 12-hour clock format. You can also choose to display AM/PM indicators if you want.
Some Samsung phones might have a Auto or Default clock format option. If you see this, make sure to toggle it off, and then select the 12-hour format. Easiest way to think about it: if you want a 12-hour clock, choose the one that says 12 hours!
How to change 24 hour clock to 12 hour clock in Samsung - YouTube
