zero hour

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English

Noun

zero hour (plural zero hours)

  1. Synonym of H-hour.
    • 1929, Sir Arthur Conan Doyle, When the World Screamed:
      I waited with occasional glances at my watch until the zero hour should arrive.
    • 1937, Siegfried Sassoon, The Complete Memoirs of George Sherston, London: Faber, page 339 (1972 paperback edition):
      Zero hour was forty-five minutes after midnight. Two companies were to attack on a 600-yard front …
    • 1972 April 17, Elton John, Bernie Taupin, “Rocket Man”, in Honky Château, performed by Elton John:
      She packed my bags last night, pre-flight / Zero hour 9 a.m. / And I'm gonna be high / As a kite by then

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