I seriously don’t get American schooling. As far as I can tell, they start a year of school in September of one year, then finish that year in June of the next year. Why not do what we do in Australia and have school start in February and finish in December, with two week holidays sprinkled in over the year, and a six week break in between school years?
In some places the schedule is pushed up a bit. You may have schools where the year starts in early August and ends in mid to late May.