is a song by the American punk rock band Green Day, released as the third single off their seventh studio album American Idiot. The song is in the key of F minor and in 4/4 time signature. Though the song is a prelude to "Boulevard of Broken Dreams", "Holiday" was released as a single later on, in the spring of 2005. The song achieved considerable popularity across the world and performed moderately well on the charts. In the U.S., it reached number nineteen on the Billboard Hot 100 and number one on the Hot Mainstream Rock Tracks and Hot Modern Rock Tracks charts. It debuted at number eleven in the UK and at number twenty-one in Canada.

During live performances, lead singer Billie Joe Armstrong liked to introduce this song with a political statement, or alternatively, a disclaimer. For example, on Green Day's CD/DVD Bullet in a Bible, Armstrong announces, "This next song's a big 'fuck you' to all the politicians. This song's called Holiday! This song is not anti-American; it's anti-war!"

"Holiday" was played in the movie Accepted and parts of the song were played in the movie Surf's Up. The song is also featured in the video game Tony Hawk's American Wasteland. It was also played in the original trailer for the motion picture War, Inc. It is also played during the Vancouver Canucks goal horn for the 2009-2010 season and was the goal song for the San Jose Sharks during the 2006–2007 NHL season.