Calendar schedules specify entire days, using the following types of day event selections: You can add as many day events as needed in the same CalendarSchedule.
The method for linking a CalendarSchedule is by referencing it from the special events configuration of one or more weekly schedules. Each referenced CalendarSchedule defines the day portion of a special event. Then, you configure time-of-day events in each special event, as needed.

For example, the figure above shows a BooleanSchedule and a portion of its special events tab, listing four special events. Three of these are reference events. Remote calendar schedules referenced by this schedule define this schedule’s calendar day(s). Although the figure shows all components in the same container, quite often calendar schedules are located elsewhere in the station.
CalendarSchedule usage by special event reference allows global changes of day definitions, where multiple weekly schedules can reference one or more calendar schedules. Any edit of a CalendarSchedule affects all weekly schedules with a special event that references it.