Thanks for the heads up as this is really valuable information for anybody planning a vacation next summer to SoCal.
These past few years have seen area school districts entertain the notion of 'year-round' school, meaning the ten weeks of summer break would be distributed throughout the school year in the form of longer holiday breaks, longer spring break, etc, but just a few weeks for summer break. If something like this were to pass, I do not know how SF would handle it. At this point, it is unclear whether or not a year-round school calendar will ever be feasible. For the sake of Six Flags, I sure hope not.
I'm excited, since the calender change will be incentive for Disney to create more blockout dates for the cheapo passholders.
But the school start change affects attendance, but not much in my region thanks to myriad out-of-towners north of it and turismos (including Brazilian tour groups).
A lot of public schools here in Virginia get out in early June and go back the day after Labor Day. This helps out the local parks as they are able to employ High School students during the busy time for their parks.
A few years back the state tried to change when the school year started, but Kings Dominion fought it and the bill was never passed.