The Dark Side of the Moon is the eighth studio album by the English progressive rock band Pink Floyd, released in March 1973. It built on ideas explored in the band’s earlier recordings and live shows, but lacks the extended instrumental excursions that characterised their work following the departure in 1968 of founder member, principal composer, and lyricist, Syd Barrett. The Dark Side of the Moon‘s themes include conflict, greed, the passage of time, and mental illness, the latter partly inspired by Barrett’s deteriorating mental state.
The Dark Side of the Moon was an immediate success, topping the Billboard Top LPs & Tapes chart for one week. It subsequently remained in the charts for 741 weeks from 1973 to 1988. With an estimated 50 million copies sold, it is Pink Floyd’s most commercially successful album and one of the best-selling albums worldwide. It has twice been remastered and re-released, and has been covered in its entirety by several other acts. It spawned two singles, “Money” and “Time”. In addition to its commercial success, The Dark Side of the Moon is one of Pink Floyd’s most popular albums among fans and critics, and is frequently ranked as one of the greatest albums of all time.