#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

No statement uses or specializes nighttime; click here to add one.