"Another Day" is a song by English rock musician Paul McCartney that was released as the A-side of a non-album single in February 1971.

The lyrics describe the daily routine of a lonely woman, using an observational style similar to McCartney's narrative in the 1966 ballad "Eleanor Rigby".

Describing his and Linda's harmonies, McCartney said he wanted "'our' sound" as he sought to create a musical identity independent of the Beatles.

Despite her lack of musical and songwriting experience, he said that his wife had been a genuine writing partner, suggesting ideas for lyrics and melodies.

[3] In author Peter Doggett's description, Northern Songs, McCartney's publisher, "believed he was effectively robbing them of half their potential income".

[10] In June the following year, ATV announced that "all differences between them have been amicably settled", with McCartney's lawyers arguing it had been his prerogative to collaborate with whomever he chose, regardless of his or her musical abilities.

[12] Dixon Van Winkle, an assistant engineer on the Ram sessions, recalled that he suggested "Another Day" after McCartney asked him to select one of the tracks for a single.

On release, many rock critics derided "Another Day" as irrelevant[23] and as a song that conveyed McCartney as having bourgeois sensibilities and a focus on conservative values.

[25] Beatles biographer Nicholas Schaffner described the song's reception: "Many of the rock critics, out for McCartney's blood, dismissed 'Another Day' as 'Paulie picking his nose.'

[27][28] Music journalist Andrew Grant Jackson comments that, given McCartney had been the Beatle who announced the band's break-up, the song's despondent tone contrasted starkly with singles such as "Instant Karma!"

In deeming the lyrics "trite", he continues, its detractors fail to appreciate that the song's female protagonist is herself "leading a life of boring and lonely everyday routines".

[32] It was featured prominently in a 2009 episode of The Simpsons titled "Bart Gets a 'Z'"; in it, Mrs. Krabappel is taunted by the Springfield High School jocks for singing a "million-year-old song."