Autumn Equinox 2025. Autumn / fall equinox 2025. From talking fridges to iphones, our experts are here to help make the world.

So, when is the autumnal equinox in 2025? 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.