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Show or hide the Holidays calendar on Mac
The Holidays calendar displays holidays based on your computer’s region.
Note: The Holidays calendar is a subscription calendar. You can’t add or delete holidays in the Holidays calendar, because subscription calendars can be modified only by the calendar provider.
Show or hide holidays
- In the Calendar app  on your Mac, choose Calendar > Preferences, then click General. on your Mac, choose Calendar > Preferences, then click General.
- Select or deselect “Show Holidays calendar.” 
Change the region used for the Holidays calendar
You can change your computer’s region to display different holidays.
- On your Mac, choose Apple menu  > System Preferences, click Language & Region, then choose your region. > System Preferences, click Language & Region, then choose your region.
- In the Calendar app  on your Mac, choose Calendar > Preferences, then click General. on your Mac, choose Calendar > Preferences, then click General.
- Deselect “Show Holidays calendar,” then select it again.