The facility I work for has the opening hours from 08:30 to 22:00. Each session available for booking is 2-hour one. So it leaves the last slot: "20:30 - 22:00", an one-and-a-half-hour slot. But since the resolution is 2-hour, the last slot says "20:30 - 22:30". Is there a way to adjust the last slot so that it only places a 1.5 hours?