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How to Change the Time Format on a Mac

You can switch between a 12-hour clock and a 24-hour clock in the 'Language & Region' section of the System Preferences menu. This is also dictated by the region you've selected. If you want to customize the way your clock is laid out, you...
Part 1 of 2:

Turning on 24-Hour Time

  1. How to Change the Time Format on a Mac Picture 1How to Change the Time Format on a Mac Picture 1
    Click the Apple menu.
  2. How to Change the Time Format on a Mac Picture 2How to Change the Time Format on a Mac Picture 2
    Click "System Preferences." If you are not taken to the main System Preferences menu, click the "Show All" button at the top of the window.
  3. How to Change the Time Format on a Mac Picture 3How to Change the Time Format on a Mac Picture 3
    Click "Language & Region." This icon can be found in the top row and has a flag for an icon.
  4. How to Change the Time Format on a Mac Picture 4How to Change the Time Format on a Mac Picture 4
    Click the "Time format" box. This will toggle between 24-hour time and 12-hour time.
  5. How to Change the Time Format on a Mac Picture 5How to Change the Time Format on a Mac Picture 5
    Click the "Region" menu to change your country. This will change your time and date formats automatically to match the country standard.
Part 2 of 2:

Creating a Custom Format

  1. How to Change the Time Format on a Mac Picture 6How to Change the Time Format on a Mac Picture 6
    Click the Apple menu.
  2. How to Change the Time Format on a Mac Picture 7How to Change the Time Format on a Mac Picture 7
    Click "System Preferences." You may already open to the "Language & Region" menu if you followed the previous method. If not, click the "Show All" button at the top of the window.
  3. How to Change the Time Format on a Mac Picture 8How to Change the Time Format on a Mac Picture 8
    Click the "Language & Region" option. This will open your Mac's region settings.
  4. How to Change the Time Format on a Mac Picture 9How to Change the Time Format on a Mac Picture 9
    Click the "Advanced" button.
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    Click the "Times" tab.
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    Click and drag elements to customize the different formats. These different lengths are used in different areas of the system.
  7. How to Change the Time Format on a Mac Picture 12How to Change the Time Format on a Mac Picture 12
    Click the menu for each element to customize it. This lets you select how the data is displayed. For example, clicking the minutes element can let you pick between "08" and "8" for the time.
  8. How to Change the Time Format on a Mac Picture 13How to Change the Time Format on a Mac Picture 13
    Type custom labels for "AM" and "PM." You can switch the before noon and after noon labels to whatever you'd like.
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