"500 Days of Summer" is a 2009 American romantic comedy-drama film directed by Marc Webb. The movie tells the story of Tom Hansen (Joseph Gordon-Levitt), a young architect who falls in love with his co-worker, Summer Finn (Zooey Deschanel), a quirky and charming woman who doesn't believe in love.

Tom, a hopeless romantic, falls deeply in love with Summer, but she warns him that she's not looking for a serious relationship. Despite this, Tom is smitten and spends the next few months trying to win her over. As the days go by, Tom and Summer's relationship evolves, and they experience a range of emotions, from euphoria to heartbreak.

The film takes a non-linear approach, jumping back and forth between the 500 days of Tom and Summer's relationship. The story is presented in a non-chronological order, reflecting the ups and downs of their romance.