An event is any entry in your calendar. Typical examples of events are:

• a birthday (a once-per-year event)
• a repeating set of dates (i.e. an every-other Monday visit)
• multi-day spans of marked time (i.e. Friday through Sunday)
• repeating multi-day spans of marked time (every-other weekend event)

Your OPTIMAL Calendar can schedule a wide variety of repeating events so that you don't have to enter them all by hand. Enter the event once, set the repeating options, and the calendar will do the rest.