"Good Day Sunshine" is a song by the English rock band the Beatles from their 1966 album Revolver. It was written mainly by Paul McCartney and credited to the Lennon–McCartney partnership. McCartney intended it as a song in the style of the Lovin' Spoonful's contemporaneous hit single "Daydream". The recording includes multiple pianos played in the barrelhouse style and evokes a vaudevillian mood. The composition contains key changes and metric anomalies, and closes with voices chanting the song title. Together with its lyrics celebrating romantic love and sunshine, the recording contrasts with the more austere and experimental aesthetic of Revolver. Among music critics, some writers have welcomed the song's lightheartedness while others view it as a track that dilutes the album's strengths. "Good Day Sunshine" has been covered by the Tremeloes, Claudine Longet and Robbie Williams. McCartney re-recorded the song for his 1984 film Give My Regards to Broad Street and has regularly performed it in concert. The song was used as the wake-up music on the Space Shuttle mission STS-135. In November 2005, McCartney played it live to the crew of the International Space Station as part of a concert link-up to the space station. Background and inspiration Paul McCartney wrote "Good Day Sunshine" at Kenwood, John Lennon's house in Surrey. Drawing inspiration from the sunny day, McCartney composed the melody on Lennon's piano. He later said that Lennon helped write the song, but "it was basically mine." Lennon recalled that the song was McCartney's and that he perhaps "threw in a line or something". McCartney said that he was influenced by the Lovin' Spoonful's hit single "Daydream" and was trying to write a song in that vein. Lennon and George Harrison had attended the Lovin' Spoonful's concert at the Marquee in London in April 1966; the Beatles and members of the Rolling Stones soon lauded them as the "hot new group". Author Steve Turner writes that the Kinks' "Sunny Afternoon" could have been another source of inspiration for McCartney. Composition The song uses the keys of A major and D major. Following a four-bar introduction, it opens with the chorus. Thereafter, the structure comprises three rounds of verse and chorus, in the second of which the verse section contains an instrumental passage; the song ends with a repetition of the chorus, followed by a fadeout coda. Musicologist Alan Pollack likens the musical form to that of a folk