#nighttime__dark  the time after sunset and before sunrise while it is dark outside
  exclusion:  #daytime
  supertype:  #time_period__period__period_of_time  an amount of time; "a time period of 30 years"; "hastened the period of his recovery"
  part:  #evening  #late-night_hour  #midnight  #small_hours  #lights-out
  part of:  #day
  subtype:  #weeknight  any night of the week except Saturday or Sunday
  subtype:  #wedding_night__weddingnight  the night after the wedding when bride and groom sleep together

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