Can I create meetings in the "Workspace Overview" calendar?

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The calendar in the "Workspace Overview" displays upcoming approval and task deadlines. Since the calendar is simply a time-driven view of workspace tasks and approvals, users are not able to create personal meetings by clicking on the calendar view. We recommend that you use personal calendaring software for this purpose, such as Microsoft Outlook.

Although you cannot add dates by clicking directly on the calendar you can use tabs like "Tasks" to put entries into your calendar.