How to Change the Calendar Region on a Mac

Last Updated: January 27, 2023

Changing your Mac's calendar region will change the format of your calendar as well as the system date. You can change the calendar format from the "Language & Region" menu in the System Preferences. You can also set your Calendar app to display an alternate calendar numbering alongside your regular calendar.

Method 1

Method 1 of 2:

Changing the Region

1
Click the Apple menu. This is in the upper-left corner of the screen.
2
Click "System Preferences." If something other than the main System Preferences menu appears, click "Show All" at the top of the window. The button looks like a grid of 12 dots.

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3
Click "Language & Region." You'll find this in the first section.
4
Click the "Calendar" menu.
5
Click the calendar type that you want to use. This will change the calendar system that your Calendar app and system time & date uses.^{[1]
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Method 2

Method 2 of 2:

Displaying Alternate Calendars

1
Click the Calendar app. You'll find this in your Dock. You Calendar app can display an alternate calendar alongside your regular one.
2
Click the "Calendar" menu. This appears when the Calendar app is the active window.
3
Click "Preferences."
4
Click the "Show alternate calendar" box. This is at the bottom of the "General" tab.
5
Click the menu to view the alternate calendars.
6
Click the alternate calendar that you want to use. This will add that calendar's numbering system to the upper-left corner of each day in the Calendar app.