Zero Hour may refer to:

• Midnight, or 00:00

Zero Hour! is a 1957 drama film directed by Hall Bartlett from a screenplay by Arthur Hailey, Hall Bartlett and John Champion. It stars Dana Andrews, Linda Darnell and Sterling Hayden and features Peggy King, Elroy "Crazy Legs" Hirsch, Geoffrey Toone and Jerry Paris in supporting roles. The film was released by Paramount Pictures. Zero Hour! was an adaptation of Hailey's original 1956 Canadian Broadcasting Corporation teleplay Flight into Danger. Hailey also co-wrote a novel with John Castle based on the same plot titled Flight Into Danger: Runway Zero-Eight (1958).