Released on The White Album, "Birthday" stands as a poignant reflection on mortality and the fleeting nature of life. Recorded in 1968, the track features a distinctive arrangement that blends orchestral swells with the band's signature rock energy, showcasing Paul McCartney's lyrical depth. The song's somber tone contrasts with the album's eclectic mix of styles, offering a moment of introspection within the group's prolific output. Its enduring legacy lies in its ability to capture universal themes of aging and loss, cementing its place as a significant work in rock history.