How do you switch from 24hr time on a acqua indiglo 30m watch?

To switch from 24-hour time to 12-hour time on a Timex Acqua Indiglo 30M watch, start by pulling the crown out to the second position. Then, press the mode button until you reach the time setting mode. Adjust the hour by turning the crown until you see the desired format (AM/PM) displayed. Finally, push the crown back in to save the settings.