How can I organize my personal calendar?
Calendar lets you organize your personal calendar by event types. By default, all events display as Personal Calendar, but you can add and customize event types to fit your needs. For more information, see the Event Types section of Managing Your Calendar Settings.
When you schedule an event, select its event type to display in your attendees' and your personal calendars. For more information, see the Details section of Scheduling Events in Calendar.
To display or hide an event type, click its name from the Personal Calendar menu in the Calendar section.