First Day Of Fall 2025 Timeline

First Day Of Fall 2025 Timeline. The fall equinox is the first day of autumn in the northern hemisphere. The first day of autumn often called fall (september equinox or autumnal equinox) is when the sun shines directly on the celestial equator passing from north to south and the.

The first day of fall in the northern hemisphere is sunday, sept. In 2025, the first day of fall, also known as the autumnal equinox, is sunday, sept.