1. The calendar feature allows you to add events and occasions, which you can choose to display to other users, or just use as a reminder to yourself.

To add an entry to the calendar, click on 'Calendar' in the main community menu bar (shown below).

2. Click on the 'Add Event' button shown below.

3. You can then enter all the details of the event, and choose whether to make it a public event or a private event.