Autumnal Equinox 2024 Dates Usa

Autumnal Equinox 2024 Dates Usa. At a precise moment each september, usually on the 22nd or 23rd, the sun is directly above the equator, marking the autumnal equinox in the northern hemisphere. The first day of fall is almost here.

Find out why the first day of autumn still features a little more daylight than darkness. The autumnal equinox (as well as spring equinox) is the moment when neither of the earth’s hemispheres is inclined towards or away from the sun.