When Is The Autumn Equinox 2024. Autumnal equinox, two moments in the year when the sun is exactly above the equator and day and night are of equal length; December 21, 2024 at 1:20 am pst.
Autumn equinox 2024 (beginning of astronomical autumn) on the day of the autumn (september) equinox, the sun, moving along the ecliptic, crosses the celestial equator, moving from the. In the northern hemisphere, the autumnal equinox takes place on september 22, 2024, at 12:44 gmt (08:44 a.m.
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