"Clocks" is a song by British alternative rock band Coldplay. It was written by all members of the band for their second album, A Rush of Blood to the Head. Built around a piano riff, the song features cryptic lyrics of contrast and urgency themes.
"Clocks" debuted to critical and commercial success, with critics mainly commenting on the song's piano melody. It was released in the United Kingdom as the third single from A Rush of Blood to the Head, where it reached number nine in the UK Singles Chart. It was released in the United States as the album's second single and reached number 29 on the Billboard Hot 100.