Unlike the other calendar types, you can make multiple selections within each custom value(except if you select one of the any options). To select multiples, first select something other than an any option, then hold the Ctrl or Shift key while you select more values.

Each custom value offers an Any selection, in addition to a specific selection.

Figure 25.   Add custom event

This window opens when you click the add control and select Custom for Type.

Within any value the schedule sets up an OR relationship. The overall result is from combining all values. For example, the above image shows a custom selection for U.S. General Election Day, which occurs on the first Tuesday after the first Monday in November.