Fall Equinox 2025 Date And Location. Autumn equinox 2025 (beginning of astronomical autumn) on the day of the autumn (september) equinox, the sun, moving along the ecliptic, crosses the celestial equator, moving from the. Autumn equinox 2025 (beginning of astronomical autumn) on the day of the autumn (september) equinox, the sun, moving along the ecliptic, crosses the celestial equator, moving from the.

2024 autumn equinox september 22 at 8:43 a.m., eastern daylight time. Find out the date when september equinox is in 2025 and count down the days until september equinox with a countdown timer.