Autumnal Equinox 2024. Understanding the autumn equinox 2024: Also, either of the two points in the sky where the ecliptic (the sun’s annual.

The fall equinox is not on the same day each year, though it always falls between. This sunday, the autumnal equinox is upon us, and with it, a shift to shorter days, longer nights and the astronomical start of fall in the northern hemisphere.