Recorded December 6, 1966 and November 28, 1967 in London, England, this song was never officially released until it appeared as the B-side to " Free As A Bird" in 1994. The original version was distributed to The Beatles fan club in 1967. It's the only song ever written specifically for the Beatles Fan Club members.
Many upbeat Pop groups of this era like The Beach Boys and The Four Seasons released Christmas songs, but The Beatles never had an official Christmas release. (thanks, Bertrand - Paris, France, for above 2)