Amara Martie

When Was The First Day Of Fall 2025. The autumnal equinox, or the first day of fall in the northern hemisphere takes place every year on september 22nd or september 23rd. This date marks the moment the sun crosses the celestial equator, heading.

Here’s everything you should know about the fall equinox—plus our. The autumnal equinox, or the first day of fall in the northern hemisphere takes place every year on september 22nd or september 23rd.