“Monday, Monday” is a 1966 song written by John Phillips and recorded by the Mamas & the Papas for their 1966 album If You Can Believe Your Eyes and Ears. It was the group’s only number-one hit on the U.S. Billboard Hot 100.
Phillips said that he wrote the song quickly, in about 20 minutes. The song includes a false ending, when there is a pause before the coda of the song, and goes up a half note for the bridges and refrains of the song. It was the second consecutive number-one hit song in the U.S. to contain a false ending, succeeding “Good Lovin’” by the Young Rascals.
On March 2, 1967, The Mamas & the Papas won a Grammy Award for Best Pop Performance by a Duo or Group with Vocal for this song.