In Step 2, you setup the pattern for the course. In this example, the course is running 1 day per week for 20 weeks at 4:30 pm.
You can use the calendar lookup to the right of the data field to help choose the correct date.
Make sure they correspond to the date you selected as a start date (for example, if you select Feb 1 and Feb 1 is a Monday, then you can't set Monday to zero performances).