# Calendars

- [Customizing Schedule Availability](/18.0/building-apps/calendars/customizing-schedule-availability.md)
- [Using Availability Schedules](/18.0/building-apps/calendars/using-availability-schedules.md)
- [Rescheduling Deflected Calls](/18.0/building-apps/calendars/rescheduling-deflected-calls.md)
- [Integrating to External Calendars](/18.0/building-apps/calendars/integrating-to-external-calendars.md)
