Spring Equinox 2024 Usa. In the northern hemisphere, the first day of spring is tuesday, march 19, 2024. 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.

What is the spring equinox and what happens on. Noaa’s goes east satellite captured the moment of autumnal equinox from space on sept 23, 2019.(image credit: