oh dark hundred

oh dark hundred

In military time, a non-specific time in the early morning, before the sun rises. Why are we meeting at oh dark hundred? That's too early to do anything besides sleep!
See also: dark, hundred, oh
Farlex Dictionary of Idioms.
See also:
  • bright and early
  • early bird catches the worm
  • early bird catches the worm, the
  • the early bird catches the worm
  • early bird
  • an early bird
  • a morning person
  • early doors
  • have an early night
  • early black