In Virginia it was report at 7:15, start at 8:00, but then you have all of the things you have to fill out and get all of the rules read to you and we didn't get started until 8:20. Stop at 12:20, but you can't get up until all of the tests have been picked up and counted, which took about 15-20 minutes. We got an hour for lunch (not all places did) and we reconvened around 1:30-1:45. Then we had the same song and dance of filling out all of the answer sheets and whatnot. We didn't start until 2:00 in the afternoon, which had us stopping at 6:00 and then it took them 15 minutes to collect all of the exams. It was 6:15 before I got out of there.
But, that was just the way Northern Virginia did it.