500 Days of Summer is a 2009 romantic comedy-drama film that follows the nonlinear story of a man named Tom Hansen and his relationship with a woman named Summer Finn, who does not believe in love.
According to the poster, the film title's closest font match is Helvetica Neue Bold Outline, while the sans serif used for the main title at the beginning of the movie is ITC Conduit Bold by Mark van Bronkhorst.