When is the First Day of Fall? Autumnal Equinox

Welcome fall! The autumnal equinox—the September equinox or the fall equinox—arrives on Sunday, September 22. Not only do temperatures drop, but plant life slows down, and so do we. Read about the first day of fall, plus some fun facts and folklore.  The fall equinox and the first day of autumn arrives on  Sunday, September 22, 2024, at 08:44 A.M. EDT in the Northern Hemisphere. The equinox occurs at the same moment worldwide.