The soundtrack LP for The Beatles' animated film Yellow Submarine was released in the United States on this day, with six songs by the group and seven orchestral pieces by George Martin.
In an attempt to sort out the problems within The Beatles following George Harrison's sudden departure two days earlier, all four met at Brookfield House, Ringo Starr's Tudor mansion in Elstead, Surrey.
Just as Ringo Starr had temporarily quit The Beatles in August 1968, George Harrison walked out on this day, unable to tolerate any longer the tensions within the group.
The sixth day of the Get Back/Let It Be sessions began with Paul McCartney working alone on a number of songs.
On the fifth day of rehearsals for The Beatles' Get Back/Let It Be project, the group continued work on the stronger songs performed thus far, and tested out arrangements on a number of others.
The fourth day of the Get Back/Let It Be sessions was a somewhat typical blend of original song rehearsals, unstructured jamming and randomly-chosen cover versions.
Following a weekend break, The Beatles' sessions and rehearsals for the Get Back/Let It Be project resumed on 6 January 1969.
The second day of rehearsals for the Get Back/Let It Be sessions saw them play a number of songs, many of which were rough versions of rock 'n' roll oldies, improvisations and numbers from the Lennon-McCartney back catalogue.
The darkest period of The Beatles' recording career was the Get Back enterprise - the group's attempt to return to their roots, which saw them initially rehearse and record songs for a television special and live performance.