The first session ends on the 6th so I would guess the second session starts the 9th.
I just checked and most of the classes start on the 9th but there are a handful of classes that start on the 2nd. So it makes sense now why he is coming when he is. It just sucks for him that he didn't come on June 8-9 so that he wouldn't be behind all the other freshmen. Plus he is going to miss more than half of the capital city league.