The Fall or Autumn Equinox is the moment when the day (light) is equal to the night (dark) and balanced is created between them.
The autumnal equinox (fall equinox, September equinox, or southward equinox) signals the beginning of autumn in the northern hemisphere: the moment when the sun appears to cross the celestial equator, heading southward.
The Autumn equinox in the northern hemisphere occurs between September 22 - September 24, varying slightly each year according to the 400-year cycle of leap years in the Gregorian Calendar.
In the southern hemisphere, the equinox occurs at the same moment, but at the beginning of spring.
At the equinox, the sun rises directly in the east and sets directly in the west. In the northern hemisphere, before the autumnal equinox, the sun rises and sets more and more to the north, and afterwards, it rises and sets more and more to the south.
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