Freaky Friday is a 1972 children's book by Mary Rodgers.

Freaky Friday may also refer to:

 Freaky Friday (franchise), including:
 Freaky Friday (1976 film), starring Jodie Foster and Barbara Harris
 Freaky Friday (1995 film), a Disney TV film adaptation starring Gaby Hoffmann and Shelley Long
 Freaky Friday (2003 film), a remake starring Lindsay Lohan and Jamie Lee Curtis
 Freaky Friday (soundtrack)
 Freaky Friday (musical), 2016
 Freaky Friday (2018 film), a 2018 TV film adaptation of the musical
 "Freaky Friday" (song), by Lil Dicky featuring Chris Brown, 2018
 "Freaky Friday", a song by Aqua from the 2000 album Aquarius
 "Freaky Friday", or triple witching hour, a stock market term