Groundhog Day (1993)

The premise is the joke: Bill Murray's sour TV weatherman wakes up to the same day in Punxsutawney, again and again. That repetition makes it the easiest movie in the world to follow, and every loop gets funnier as he learns the day by heart and starts bending it to his will. Under the comedy it sneaks in a sincere story about becoming a better person, which wins over people who think movies are all noise. Harold Ramis directed it, and it joined the National Film Registry in 2006.