Any calendar you’ve created in Outlook can be deleted except the primary Outlook calendar, which is used to keep track of meeting requests that you send and accept as well as appointments and events you schedule. Additional calendars that you open, such as shared, team, or SharePoint calendars can be deleted and removed from the folder pane and the Calendar.

1. In Calendar, in the Folder Pane, right-click the name of the calendar that you want to delete.

2. Click Delete Calendar.

3. To confirm the deletion, click Yes.