Windows 10 can display the clock in 12-hour format with AM and PM without changing the computer’s actual time or time zone. Change the regional time format in Settings.
Switch Windows 10 to 12-hour time
- Open Settings.
- Select Time & Language.
- Choose Region.
- Open the regional data-format controls.
- Choose a Short time format that includes AM and PM.
- Choose a corresponding Long time format if you want consistent 12-hour formatting.
Short and long time are separate formats
Different parts of Windows and different applications can use either format. Setting both prevents one interface from showing 12-hour time while another still displays a 24-hour value.
Do not change the time zone
The time zone determines the actual local time Windows calculates. The 12-hour versus 24-hour setting only changes how that time is written on the screen.
Applications can override Windows formatting
Some programs and websites provide their own clock preference. If one application continues to show 24-hour time, check its settings rather than changing Windows repeatedly.
Normal Windows 10 support ended October 14, 2025.
Matt Jacobs has been working as an IT consultant for small businesses since receiving his Master’s degree in 2003. While he still does some consulting work, his primary focus now is on creating technology support content for SupportYourTech.com.
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