#phase_of_the_moon  a time when the moon presents a particular recurring appearance
  supertype:  #time_period  #phase
  subtype:  #new_moon__newmoon__new_phase_of_the_moon  the time at which the moon appears as a narrow waxing crescent
  subtype:  #half-moon  the time at which the moon is at first or last quarter when half its face is illuminated
     subtype:  #first_quarter  the first fourth of the moon's period of revolution around the Earth
     subtype:  #last_quarter  the last fourth of the moon's period of revolution around the Earth
  subtype:  #full_moon__full-of-the-moon__full_phase_of_the_moon  the time when the moon is fully illuminated
     subtype:  #harvest_moon__harvestmoon  the full moon nearest the September equinox

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