dead of

dead of night

The middle of the night. Why are you calling me in the dead of night? Can't this wait till morning?
See also: dead, night, of

dead of winter

The middle of winter, which is usually especially cold. I find myself dreaming of tropical islands every year in the dead of winter.
See also: dead, of, winter
Farlex Dictionary of Idioms.

dead of

The period of greatest intensity of something, such as darkness or cold. For example, I love looking at seed catalogs in the dead of winter, when it's below zero outside. The earliest recorded use of dead of night, for "darkest time of night," was in Edward Hall's Chronicle of 1548: "In the dead of the night ... he broke up his camp and fled." Dead of winter, for the coldest part of winter, dates from the early 1600s.
See also: dead, of
The American Heritage® Dictionary of Idioms by Christine Ammer.
See also:
  • dead of night/winter, the
  • in the dead of night
  • the dead of night
  • dead of night
  • dead of winter
  • the dead of winter
  • dead drunk
  • dead president
  • president
  • the quick and the dead
References in periodicals archive
Still, no one could accuse the Dead of crassly chasing a mass audience.
Come hear Uncle Sam's band: the hippie capitalism of the Grateful Dead