Edit calendars on Mac
A calendar is identified by its name and colour, which you can change at any time. You can also change the time zone of a calendar.
Changing a calendar’s colour changes the colour of all its events. If you want an event to have a different colour, either change the colour of the whole calendar or move events to a calendar with a different colour.
Rename a calendar
Go to the Calendar app
on your Mac.
Double-click the calendar’s name in the list, or force-click the name.
If you don’t see the calendar list on the left, choose View > Show Calendar List.
Type a new name for the calendar.
You can’t rename the Exchange calendar named Calendar.
Change a calendar’s colour
Go to the Calendar app
Control-click the calendar’s name in the calendar list.
If you can’t see the calendar list on the left, choose View > Show Calendar List.
Click a preset colour to select it, or choose Custom Colour to select a colour from the Colours window.
Note: You can’t change the colour of some calendars, such as the Birthdays calendar and the Siri Suggestions calendar.
Switch a calendar’s time zone
If you change your calendar’s time zone, new events use the new time zone. When you switch back to the time zone that your Mac is using, events created in the other time zone keep that time zone. Any other events return to their original dates and times.
For example, you might temporarily switch to Eastern Time to schedule a Broadway play during your upcoming holiday. When you arrive in New York, you switch your calendar to Eastern Time. Back at home, events you added while in New York keep the Eastern Time zone. Other events return to their original dates and times.
Go to the Calendar app
Choose Calendar > Settings, then click Advanced.
Select “Turn on time zone support”.
Click the pop-up menu to the left of the calendar search field, then choose a time zone.
To choose a time zone that isn’t listed, choose Other.