The title of the titular song was a result of happenstance for which Paul McCartney claims credit. McCartney had been banned from driving for a speeding violation, and while travelling to John Lennon's home in a chauffeur-driven car one day, he idly asked the driver if he'd been working hard. The driver responded dryly, "Eight days a week".
The digital remastering of The Beatles' recordings for the soundtrack was engineered by Giles Martin, son of the Beatles' legendary producer, George Martin.
In scenes shot during The Beatles June 1964 tour of the Netherlands, Hong Kong, Australia and New Zealand, substitute drummer Jimmy Nicol is seen but not mentioned. Nicol was hired to fill in when, on the eve of the tour, Ringo Starr was hospitalized with tonsillitis.
Paul McCartney, Ringo Starr and Yoko Ono attended the premiere in London, along with Liam Gallagher and Noel Gallagher.
During the ending credits, George Harrison remembers their secretaries. Between them is Freda Kelly, who worked for The Beatles through all their career, as narrated in the documentary "Good Ol' Freda (2013)."