moment of truth

moment of truth
    n 1: the moment in a bullfight when the matador kills the bull
    2: a crucial moment on which much depends
    

35 Moby Thesaurus words for "moment of truth":
      A-day, D day, H hour, charged moment, critical moment,
      crucial moment, day, deadline, decisive moment, eleventh hour,
      fateful moment, hour, instant, interval, juncture, kairos,
      kairotic moment, minute, moment, nick of time, period, point,
      pregnant moment, psychological moment, season, space, span, spell,
      stage, stretch, target date, time, time lag, while, zero hour