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Add or delete calendars on Mac
Create separate calendars for different areas of your life—work, home, school, and so on. Each calendar has its own color. When viewing multiple calendars, you can see which calendar each event belongs to based on its color. To change an event’s color, move the event to a different calendar or change the calendar’s color.
Add a calendar
In the Calendar app
on your Mac, choose File > New Calendar.
Name the calendar, then press Return.
If you can’t add a calendar for a particular calendar account, try adding a calendar on the account provider’s website. For example, to create a Google calendar, go to google.com.
Delete a calendar
In the Calendar app
on your Mac, click the calendar’s name in the calendar list.
If you don’t see the calendar list on the left, choose View > Show Calendar List.
Choose Edit > Delete.
Some calendars can’t be deleted.
You can’t delete delegated calendars, but you can stop showing them in the main Calendar window. See Share calendar accounts.
If you can’t delete a calendar for a particular calendar account, try deleting the calendar on the account provider’s website. For example, to delete a Google calendar, go to google.com.
If a calendar account has only one calendar (not counting other people’s calendars you’re sharing), you can’t delete that last calendar.
Add a calendar group
You can create calendar groups in the On My Mac section of the calendar list.
In the Calendar app
on your Mac, select a calendar in the On My Mac section of the calendar list.
If you don’t see the calendar list on the left, choose View > Show Calendar List.
If you don’t see an On My Mac section in the calendar list, your calendars are in an account (such as iCloud).
Choose File > New Calendar Group.
To add another calendar to a group, drag it onto the group name. To remove a calendar from a group, drag it to the On My Mac heading in the calendar list.