I hope I don't present an angry face as I address this issue, but something must be said!
Autumn does not begin until September 23, 2011 at 5:05 am. This means that we have almost two months before the "End of Summer." I know that kids will be going back to school soon, and that Summer vacation is drawing to a close, but this does not signify the "End of Summer." After school begins there will be (depending on your school) approximately five weeks left of summer.
I love summer, and all that goes with it! I love hot days floating in the pool, picnics in the parks (in the shade of course), festivals, long sunny days, ice cream and Popsicles, and the season in general! So, I get a little annoyed when people try to shorten it simply because kids are going back to school. (Which I think they do too early anyway.)
It's fine if you want to start your fall activities in August when it's pushing 90, but I'll wait until October, when I can enjoy changing leaves, ripe pumpkins, and the crisp breeze in the air!