Title:	Birthday
Credits:	John Lennon - Paul McCartney
Recorded	EMI Studios, London, 18 September, 1968
Producer	George Martin
Engineer	Ken Scott
Location	The Beatles - track 1, disc 2

Virtually written by Paul in the studio as the session progressed, Birthday is a powerful rock number recorded and completed by all four Beatles in one swift session, save for a two-hour break when musicians and studio staff rushed around to Paul's house nerby to watch The Girl Can't Help It. Pattie Harrison and Yoko One contributed backing vocals.

The Beatles recorded 'Birthday' on September 18, 1968. Paul McCartney arrived at the studio before the other Beatles, playing the song's riff. He wrote the song in the studio and when the others arrived, they recorded it in twenty takes (1 - 20). The recording began on four-track but was transferred to eight-track (take 20 into takes 21 and 22). The mono mix was also prepared this day (remix 1 from take 22). The stereo mix was created on October 14 (remix 1 from take 22). The stereo version has additional vocals at the end of the second chorus, which are missing from the mono version. The track was released on The Beatles' album "The Beatles" on November 22, 1968.

In the spring of 1976 George Martin remixed a stereo version of this track in Los Angeles for the US release of the "Rock 'N' Roll Music" album. This album was released in the US on June 7, 1976. The UK release of this album featured the original stereo mix of this track.

A shortened version of this song is found on the Italian eight-track edition of the "Rock 'N' Roll Music" album.

Paul McCartney performed this song at the June 30, 1990 Knebworth Benefit Concert. This performance was released in both the US and the UK November 5, 1990 on the "Tripping The Live Fantastic" album.