4 weeks in Summer, an extra week tacked onto the May half term hol and an extra week in early October. Fantastic. Bring it on.
I have no idea how longer/shorted hols affect teenagers- mine are 9 and 11 but for me, those last couple of weeks of holiday are a real pain. The boys are bickering. They're bored. Like many here (but evidently, looking at this thread, not that many!) I work (PT) so I shell out £39 a day for CC where the boys 'hang around', basically. Or DH and I juggle childcare. DS2 takes at least 3 weeks to catch up to where he left off at the end of the previous term. I 'overcome' this by effectively home-schooling him, albeit PT over the hols! So much for the total relax and unwind! The flipside of these disproportionately long summer hols can be the lo-o-ong half terms. I certainly had 6 year olds weeping with exhaustion by week seven and a half.
Over these past few years, 'Summer' is over by August. This year, June was summer here in the south, last year it was MAY.
As for everyone trying to fit in their hols over those 4 weeks, well, surely many would be doing a summer holiday in one or both of the weeks in late May/early June? Or the Med or Turkey in early October? I certainly would.
Finally, yes, I appreciate teaching can be demanding but, amongst my many teacher friends, I have to say it's only those who 'came into' teaching later who appreciate that it is actually a well remunerated, well protected profession, and they, almost to a person, mutter about 'lack of preparation' when any of their colleagues are still doing anything 'school-y' a week after school ends or start up a week before school recommences. AND they concede that as most do the same year group every year, they follow exactly the same teaching syllabus as last year...!