On this Day
January 19, 1967
The Beatles began recording the song, with a working title of "In the Life of ...", at EMI's Studio Two on 19 January 1967. (Lewisohn, Mark (2005) [1988]. The Complete Beatles Recording Sessions: The Official Story of the Abbey Road Years 1962–1970. London: Bounty Books, p. 94. - Wikipedia
"A Day in the Life" is one of The Beatles' most influential songs. Paul Grushkin in his book "Rockin' Down the Highway: The Cars and People That Made Rock Roll," called the song "one of the most ambitious, influential, and groundbreaking works in pop music history."
In "From Craft to Art: Formal Structure in the Music of the Beatles," the song is described thus: "A Day in the Life" is perhaps one of the most important single tracks in the history of rock music; clocking in at only four minutes and forty-five seconds, it must surely be among the shortest epic pieces in rock." - Wikipedia