"Leap Day" is the ninth episode of the sixth season of the American television comedy series 30 Rock, and the 112th overall episode of the series. It was directed by Steve Buscemi and written by Luke Del Tredici. The episode originally aired on NBC in the United States on February 23, 2012 and received positive reviews for its inventive script and the engaging performance by its guest stars. The episode revolves around star Liz Lemon facing a crisis when presented with an extravagant sum of money to have sex with an old acquaintance, while her boss Jack Donaghy learns the true meaning of Leap Day and the possibilities it presents to mend broken relationships.

The sixth season of 30 Rock, an American television comedy series on the NBC network in the United States, began airing on January 12, 2012. 30 Rock was renewed for a sixth season by NBC on November 15, 2010. The season began airing mid-season to accommodate Tina Fey's pregnancy. On November 14, 2011, NBC announced that 30 Rock would return at the new time of 8:00 pm.