Change Advanced settings in Calendar on Mac
Use Advanced settings in Calendar to set advanced time zone, event, alert and invitation options.
To change these settings in the Calendar app on your Mac, choose Calendar > Settings, then click Advanced.
Turn on time zone support
Adds a pop-up menu to the toolbar that you can use to change the time zone in which all events are shown. For example, an event set for 12:00 pm Pacific Time is shown at 7:00 pm GMT.
Also set the time zone for each event. For example, if you set an event at 7:00 pm GMT, and then choose Pacific Time from the pop-up menu in the toolbar, that event is shown at 12:00 pm.
Show events in Year view
See when you’re busier in Year view. Days with more events appear in darker colours.
Show week numbers
See week numbers in Week, Month or Year view.
Show invitee declines
See when an invitee declines your invitation to an event.
Open events in separate windows
Have events open in separate windows.
Ask before sending changes to events
Select to have a message appear whenever you change the start time, end time or other details for an event with invitees.
Remove all recent locations and attendees
The locations and attendees you enter in calendar events are saved for later use as suggestions when you create new events.
To remove the attendees and locations you’ve previously entered, click “Remove all recent locations and attendees”, then click Delete.