When Is The Fall Equinox 2024 In Usa. The autumnal equinox brings fall to the northern hemisphere today as the sun passes directly over the equator at noon. 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.
The first day of fall in 2024 is sunday, sept. When is the first day of fall in 2024?