Aug 14: Instruction Ends for Summer Session III Aug 14 Instruction Ends for Summer Session III Instruction ends for summer session III. Aug 18: Grades Due for Summer Session III Classes Aug 18 Grades Due for Summer Session III Classes Grades due for summer session III classes. Aug 28: Last Day to Pay In Person Without Late Penalties Aug 28 Last Day to Pay In Person Without Late Penalties Last day to pay in person without late penalties. Aug 30: Last Day to Pay Online Without Late Penalties Aug 30 Last Day to Pay Online Without Late Penalties Last day to pay online without late penalties.