Choose multiple dates that are not in consecutive order

I own a pottery shop that caters to courses that are 4 sessions (4 different days, with different timeslots). I want the students to be able to book 4 different dates that don't have to be in consecutive order.\n\nfor example:\n\nStudent books these dates in one purchase:\n\nSession 1: January 1, 10am-1pm\nSession 2: January 5, 10am-1pm\nSession 3: January 16, 10am-1pm\nSession 4: January 25, 10am-1pm\n\n