Answer:
But the "beautiful time" masks a rather sad story.
Written and sung by McCartney, the iconic track was the last Beatles single to be unveiled before he announced his departure from the band.
Speaking to James Corden on the his segment of Carpool Karaoke last year, McCartney has recalled how his late mother - who died from cancer when he was 14 - inspired him to write the track.
Linda and Paul McCartney at the very final Beatles photo shoot in August 1969
The Liverpool legend explaned: "I had a dream in the Sixties where my mum who died came to me in a dream and was reassuring me, saying: 'It's gonna be OK. Just let it be..."
McCartney's mother was also named Mary, which has been cited as an inspiration for the "Mother Mary" lyric.
However, when in asked if it had any reference to the Virgin Mary, The Beatle has been known to leave it up to fans' interpretation.
However, there is one other version of the story.
Mal Evans was one of The Beatles' right hand men. Together with Neil Aspinall (who ended up managing the band's Apple empire), Evans was the Fab Four's road crew, personal assistant and general go-to good guy and mate.
In 1975 TV special hosted by David Frost and called A Salute To The Beatles, Evans explained that it was him - and not Paul's mum - that was going to be the subject of the song,
Speaking to Frost, Evans said: "Paul was meditating one day and I came to him in a vision, and I was just standing there saying “let it be, let it be…” And that’s where the song came from… It's funny because we were coming home from a session one night, and it was 3 o’clock in the morning, raining, dark in London, and Paul was telling this, saying I've written this song.
"It was gonna be Brother Malcolm but I’ve had to change it in case people get the wrong idea!”
Step-by-step explanation: