A Sure Sign of?

Are you ready for the summer?
Are you ready for the sunshine?
Are you ready for the birds and bees,
the apple trees,
and a whole lot of fooling around

Are you ready for the summer?
Are you ready for the hot nights?
Are you ready for the fireflies,
the moonlit skies,
and a whole lot of fooling around

No more pencils, no more books
No more teachers dirty looks
No more math and history,
Summer time has set us free

Are you ready for the summer?
Are you ready for the good times?...

A prize to the Blipster who names the movie.... :)