The Moody Blues - peak hour bbc easybeat session, 1967

"Days Of Future Past was one of the first concept albums, depicting an archetypical "day" from morning to night. However, it didn't start out that way. Justin Hayward explained to Beat Instrumental in a June 1971 interview: "Days Of Future Past was really a concept for a stage presentation we'd worked out to take up a whole hour set. It turned out that it took the form of a day because I'd written a song 'Nights in White Satin.'"