1. Go to Settings > System Date & time to access time settings, including the 24-hour system, and double tap it.
2. Open the clock app, tap More in the top right corner, select Settings > Change time and go to the Date & time settings.
Features:
1. 24-hour system: the clock defaults to the 24-hour system. If the 24-hour system is unselected, the time will be displayed in the 12-hour system.
2. Time zone: you can choose to set the time zone and time manually or automatically.