"Days of Future Passed" is the second studio album by The Moody Blues, released in 1967, and is widely regarded as one of the earliest examples of progressive rock as well as one of the first rock concept albums. The album marked a significant shift in the band's musical direction, blending original songs with orchestral interludes. This shift was partly due to the introduction of new band members—guitarist and vocalist Justin Hayward and bassist John Lodge—who replaced Denny Laine and Clint Warwick. With Hayward and Lodge onboard, the band moved away from their earlier rhythm and blues style toward a more complex and original approach to songwriting.
The album was also the first collaboration with producer Tony Clarke, whose guidance played a crucial role in shaping the band's new sound. One of the key innovations on the album was the use of the Mellotron, an early keyboard instrument that could reproduce orchestral sounds through tape loops. Played by Mike Pinder, the Mellotron allowed the band to incorporate symphonic elements into their music, complementing Ray Thomas' flute and giving the album a distinctive classical-rock fusion. This approach to combining rock with orchestral arrangements, conducted by Peter Knight, was a major departure from traditional rock music at the time and helped define the band's sound in the years that followed.
The album’s concept revolves around the passage of a single day in the life of an ordinary person, with each song representing a different moment or emotion. Despite a modest initial reception, Days of Future Passed gained significant traction over time, especially through its hit single "Nights in White Satin," which received extensive FM radio airplay. By 1972, the album had become a top-ten hit in the U.S. and has since been recognized as one of the most important albums of 1967. Its combination of original compositions, innovative use of the Mellotron, and orchestral arrangements helped cement The Moody Blues as pioneers of progressive rock.
The album cover for Days of Future Passed was designed by David Anstey, who was commissioned specifically for the project. Justin Hayward recalls that the band gave Anstey a brief description of their songs during a meeting in a pub, and based on that, he quickly came up with the artwork. The final design was a painted collage that incorporates various time-related symbols, reflecting the album's thematic focus on the passage of time. Elements like an hourglass, a sunset, moon phases, and mounted knights are featured in the artwork, each tying into the album's concept. The final cover used for the album was a scaled-down version of Anstey's original illustration.