#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"
  subtype:  weeknight  wedding_night
  part of:  day
  part:  evening  the early part of night (from dinner until bedtime) spent in a special way; "an evening at the opera"
  part:  late-night_hour  the latter part of night
  part:  midnight  12 o'clock at night; the middle of the night; "young children should not be allowed to stay up until midnight"
  part:  small_hours  the hours just after midnight
  part:  lights-out  a prescribed bedtime

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