Corrected entry: In the beginning of the movie Billy says he'll go to school for 2 weeks per school-year which gives him 24 weeks to go all the way to graduation. His dad says if he finishes by June 15th he wins. Billy was just in the pool no more than a day ago and it was obviously pretty warm outside, how is this possible if it's 24 weeks from June 15th? That would make it December the previous year.
Lummie
18th Jun 2006
Correction: This would be true for some areas in the US, however it never seems to be established in the film where it actually takes place so it's impossible to say it would be too cold to go swimming.
Lummie ★