Back when I was a wee Jupi, I think we got out of school in mid to late June. But we went BACK after Labor Day.
Now what I usually see is getting out well before June 10th, and going back to school August 20th or so.
I remember one year when the teachers went on strike.
We didn't get out of school until... July 28th or something. And then we went back to school August 15th. Haha.