Instead of linking CalendarSchedules, you typically “reference” them 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, Figure 334 shows a BooleanSchedule and a portion of its special events tab, listing five special events. Three of these are “Reference” types, meaning their calendar day(s) are defined remotely in the configuration of the referenced CalendarSchedules. Although all components are shown here in the same container, quite often CalendarSchedules are located elsewhere in the station.

CalendarSchedule usage by “special event reference” allows global changing of day definitions, where multiple weekly schedules can reference one or more CalendarSchedules. Any edit of a CalendarSchedule affects all weekly schedules containing a special event that references it.