oh dark thirty

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oh dark thirty

In military time, a non-specific time in the early morning, before the sun rises. Why on earth are we meeting at oh dark thirty? That's too early to do anything besides sleep!
See also: dark, oh, thirty
References in periodicals archive ?
My weakness as a hunter is definitely my attention span, that and cynicism, but this guy had also showed up alone at oh-dark-thirty and worked hard to try to make something happen.
No problem on the pistol, and I'll see you, boots, blue jeans, and hat equipped, around oh-dark-thirty Saturday morning.
I STOOD BY MY JET AT OH-dark-thirty, January 17, 1991, and watched the first package of F-4G Wild Weasels takeoff.
It's nearly oh-dark-thirty (that's military talk for the time in the morning long before the rooster crows) on Saturday, November 7.