black monday Meaning, Definition & Usage

Black" Mon`day
Definitions
  1. Easter Monday, so called from the severity of that day in 1360, which was so unusual that many of Edward III.'s soldiers, then before Paris, died from the cold. Stow.
    Then it was not for nothing that may nose fell a bleeding on Black Monday last. Shak.
  2. The first Monday after the holidays; -- so called by English schoolboys. Halliwell.

Webster 1913