20. American Graffiti (1973)
Let’s begin at the end. 2 September 1962: the final night of the summer vacation; one last big blowout before adult life intervenes. George Lucas’s rambunctious salute to footloose youth paints vivid vignettes of Modesto, California, rocking around the clock with its loose-knit gaggle of characters. But this has one eye on the meter and knows that time is running short.