Amazfit Pace can be changed from 24 hour display to the 12 hour display or 12 hour display to 24 hour. Please check the following steps:
1)Press and hold the button near the top right-hand side of your watch to turn on Pace;
2)Swipe DOWN to access System Settings;
3)Tap 'More Settings';
4)Swipe UP and tap 'Common';
5)Tap Time Format in the Common to change 12 hour or 24 hour.