"In the Mood" is a song by Canadian rock band Rush from their debut album, Rush. It was at least two years old when recorded for the album. It is three minutes and 34 seconds long and in 4/4 time. It is the only song on the album written entirely by Geddy Lee (the music on all other songs is co-written by Alex Lifeson).
The song was always performed in concert — often in a medley, and usually near the end of the final encore — until the 1992 Roll The Bones tour, when it was dropped. In live performances, the line "Hey, baby, it's a quarter to eight" was often altered to include a woman's name in place of the word "baby."