The Modern Folk Quartet, often abbreviated as MFQ, was a prominent American folk music band established in 1962. Known for their harmonious blend of traditional folk and pop influences, they played a crucial role in the early 1960s folk revival. Notable members included Cyrus Faryar, Henry Diltz, Chip Douglas, and Jerry Yester, who all contributed to the group's signature sound. Despite their brief initial run, their influence extended beyond their active years, particularly with their song "This Could Be the Night," which was produced by Phil Spector and became a cult classic.