Set Your Mac's Clock to 24-Hour Time

  Matt Cone       January 31, 2021      Tutorials Mac


Many people use a 24-hour clock, also known as “military time,” to keep track of time. This is the most commonly used time notation in the world today, and it’s the international standard notation for time of day. The 24-hour clock is especially popular in military and health care environments.

Here’s how to set your Mac’s clock to 24-hour time (military time):

  1. From the Apple menu, select System Preferences.

  2. Click Dock & Menu Bar.

  3. From the sidebar, select Clock.

    Mac on military time

  4. Select the Use a 24-hour clock checkbox.

Congratulations! Your Mac is now displaying 24-hour time. If you ever want to disable 24-hour time and use 12-hour time again, simply deselect the Use a 24-hour clock checkbox.

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© 2021. A Matt Cone project. CC BY-NC-SA 4.0. Made with 🌶️ in New Mexico.