# Working with Change Calendar
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You can use the Amazon Systems Manager console to add, manage, or delete entries in Change Calendar, a tool in Amazon Systems Manager. You can also import events from supported third-party calendar providers by importing an iCalendar (`.ics`) file that you exported from the source calendar. And, you can use the `GetCalendarState` API operation or the `get-calendar-state` Amazon Command Line Interface (Amazon CLI) command to get information about the state of Change Calendar at a specific time.

**Topics**
+ [Creating a change calendar](change-calendar-create.md)
+ [Creating and managing events in Change Calendar](change-calendar-events.md)
+ [Importing and managing events from third-party calendars](third-party-events.md)
+ [Updating a change calendar](change-calendar-update.md)
+ [Sharing a change calendar](change-calendar-share.md)
+ [Deleting a change calendar](change-calendar-delete.md)
+ [Getting the state of a change calendar](change-calendar-getstate.md)