#September_equinox__autumnal_equinox__fall_equinox  September 22
  exclusion:  March_equinox
  supertype:  equinox  either of two times of the year when the sun crosses the plane of the earth's equator and day and night are of equal length
  part of:  autumn__fall  the season when the leaves fall from the trees; "in the fall of 1973"

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