Does disabling Use 24-hour format guarantee AM/PM in every app?

No. The toggle controls the system clock and most built-in UI elements. Some apps and home screen widgets use their own clock rendering and may need a separate setting.

Can I set a different clock format for the lock screen only?

There is no separate lock screen toggle. The setting under Date & time applies to the lock screen, status bar, and most system apps at the same time.

Will switching the time format also change how calendar events display?

Yes. Calendar apps that rely on the system clock format usually follow the same 12- or 24-hour setting you choose in Date & time.

Android

Android: Change the Clock Between 12- and 24-Hour Format

If your phone's clock keeps switching between AM/PM and 24-hour display whenever you change the system language, that's expected: Android ties the time format to your locale by default. To keep one fixed format no matter which language you use, you need to override that locale default in the clock settings.

Updated: 04.08.20263 min4 steps

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Android

Switch Between 12- and 24-Hour Time Format auf Android

Android decides whether to show AM/PM or a 24-hour clock based on the region tied to your current system language. That's why the format can flip on its own after you switch languages, even if you never touched a clock setting.

To force one format regardless of language, you need to disable the locale default and pick the format manually.

Menu path

Tap on Settings ➔ Tap on System ➔ Tap on Date & time ➔ Enable or disable Use 24-hour format

Enabling this toggle switches the clock to 24-hour display everywhere in the system UI. Disabling it brings back the 12-hour format with AM/PM markers.

This setting only changes the system clock and default UI elements. Some third-party apps and home screen widgets render their own clock and may ignore the system toggle, so check their individual display settings if the format still looks wrong there.

Frequently asked questions

Android reads the region linked to your language setting and picks a matching time format automatically. Changing the language resets this unless you have already disabled the locale default under Settings ➔ System ➔ Date & time.

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Android: Change the Clock Between 12- and 24-Hour Format

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Switch Between 12- and 24-Hour Time Format auf Android

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