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- Dictionaryau·tum·nal e·qui·nox
noun
- 1. the equinox in autumn, on about September 22 in the northern hemisphere and March 20 in the southern hemisphere.
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Autumnal EquinoxAstronomical event
Two moments in the year when the Sun is exactly above the Equator and day and night are of equal length; also, either of the two points in the sky where the ecliptic (the Sun’s annual pathway) and the celestial equator intersect. britannica.com
- September equinox
- September 21 – 24
- March equinox
- March 19 – 21
Image source: britannica.com
