That all depends upon the state/community. Here in Michigan we used to start school depending upon local school systems from Mid-August to the Thursday following Labor Day. The state tourist industry convinced the Legislature that early school starts were causing major economic losses and a law was passed forcing all Public Schools (and possibly charters, since they also get some state support) to start after Labor Day and not before.
That all depends upon the state/community. Here in Michigan we used to start school depending upon local school systems from Mid-August to the Thursday following Labor Day. The state tourist industry convinced the Legislature that early school starts were causing major economic losses and a law was passed forcing all Public Schools (and possibly charters, since they also get some state support) to start after Labor Day and not before.