Heyday may refer to: Heyday (The Church album), 1986 Heyday (Fairport Convention album), 1987 Heyday (song), a 2000 song by Mic Christopher Heyday (novel), a historical novel by Kurt Andersen Heyday Books, an independent nonprofit publisher based in Berkeley, California Heyday Films, a British film production company Heyday Records, an independent record label founded in 1988 by Pat Thomas Heyday (horse) (born 1987) Hey Day, a tradition at the University of Pennsylvania See also Hayday, an English surname Hay Day, a mobile farming game