"Graduation Day" is the season finale of the WB Television Network's third season of the drama television series Buffy the Vampire Slayer, consisting of the twenty-first and twenty-second episodes. They were written and directed by series creator Joss Whedon. "Part 1" first aired on May 18, 1999 and "Part 2" first aired on July 13, 1999. The second part was to originally be aired on May 25, 1999, but was postponed due to the episode's content and the occurrence of the Columbine High School shootings one month prior.