In the event that you're taking taking it so late because you couldn't get an earlier spot, check ProctorU again - I'm in a nearby timezone and on registration day it seemed like there was nothing before 9pm. Went back a couple days later and they had mercifully added (or re-added/opened) times in the mid-late afternoon. Switched from 9:30pm to a more favorable time. If there are still no earlier slots, it may be worth checking after the 13th, which is the official deadline to move/cancel your Oct registration without penalty. More reasonable times could open if any of the holders of the good spots change their mind. Good luck!