You can add an event to a calendar by either selecting the Add Events Icon above the calendar or you can mouse over the pencil icon and choose 'Add Event'.
In the 'Basic Settings' give your event a Title and a Start/End date and time. You can also choose to make the event an All Day Event.
Give your event a description then select the 'Update' button.
Keywords: How Do I, How To, Getting Started, Calendar, Adding Events