Realme
Switch Between 12-Hour and 24-Hour Clock auf Realme
Realme UI sets the clock format automatically based on the time source and region detected over the network. This works well most of the time, but it can leave you with a 24-hour display when you expect 12-hour AM/PM, or the other way around.
The setting that controls this lives in the system date and time menu, separate from the general display settings. It affects the lock screen, status bar, alarms, and any app that reads the system clock format.
Where to change the format
Open Tap on Settings ➔ Tap on Additional settings ➔ Tap on Date & time ➔ Enable or disable 24-hour format. Turning the toggle on switches the clock to 24-hour display. Turning it off returns the clock to 12-hour display with AM/PM.
This toggle only affects the format, not the actual time. If the displayed time itself is wrong, check whether automatic date and time is enabled and whether the correct time zone is selected, both found on the same Date & time screen.
Apps with their own clock widgets or third-party lock screens may not always follow this system setting. If a specific app still shows the wrong format after changing this option, check that app's own display settings.