The Standard Calendar is quite powerful, because of its ability to juggle show windows with different listing sets.

That flexibility does come with a couple limitations:

• Listings cannot be assigned to standard calendars from the Listings page.
• The default account calendar cannot be set to a standard calendar.

These limitations exist because listings are not assigned to a standard calendar, itself. Listings are assigned to the show windows of the standard calendar.

The above two actions can be done with a Regional Calendar.