1964, The Beatles filmed the “chase scenes” for A Hard Days Night with actors dressed as policemen in the Notting Hill Gate area of London. In the evening they recorded the title track for the film, ‘A Hard Day’s Night’ at Abbey Road. John and Paul had the title first, and had to write a song to order, completing the track in nine takes.
The song’s title originated from something said by Ringo Starr. Starr described it this way in an interview with disc jockey Dave Hull in 1964: “We went to do a job, and we’d worked all day and we happened to work all night. I came up still thinking it was day I suppose, and I said, ‘It’s been a hard day… and I looked around and saw it was dark so I said, ‘…night!’ So we came to ‘A Hard Day’s Night.'” – wikipedia
A Hard Day’s Night (film) – Wikipedia
A Hard Day’s Night (album) – Wikipedia
A Hard Day’s Night (song) – Wikipedia