Once in a Blue Moon may refer to:
Film and television Once in a Blue Moon (1935 film), an American film directed by Ben Hecht Once in a Blue Moon (1995 film), a Canadian children's adventure film Once in a Blue Moon (2011 film) or A Ghost of a Chance, a Japanese film directed by Kōki Mitani Once in a Blue Moon: A Celebration of Australian Musicals, a 1994 Australian television special "Once in a Blue Moon" (Charmed), a television episode
Literature Once in a Blue Moon (comics), a 2004 graphic novel by Nunzio DeFilippis and Christina Weir Once in a Blue Moon (stories), a 2003 story collection, included in the 2010 collection Screwtop Thompson, by Magnus Mills
Music Albums Once in a Blue Moon (Fool's Garden album) or the title song, 1993 Once in a Blue Moon (Frankie Miller album), 1973 Once in a Blue Moon (Phil Beer Band album), 2001 Once in a Blue Moon (University of Texas Jazz Orchestra album) or the title song, 2000 Once in a Blue Moon: A Celebration of Australian Musicals, a soundtrack album from the 1994 Australian television special Once in a Blue Moon, by Mabel Mercer, 1958
Songs "Once in a Blue Moon" (song), by Earl Thomas Conley, 1986 "Once in a Blue Moon", by Lighthouse Family from the album Postcards from Heaven, 1997 "Once in a Blue Moon", by Sydney Forest from the soundtrack album Simply Irresistible, 1999 "Once in a Blue Moon", from the musical Summer Rain, 1983
See also Once in a Very Blue Moon, a 1984 album by Nanci Griffith, or its title song Blue moon, a lunar event erroneously assumed to have given rise to the expression Once Upon a Blue Moon: Science Fiction Stories, a 2006 sci-fi short story collection by Indian writer Sukanya Datta Once in a Lifetime (disambiguation)