Autumnal Equinox 2025 Date

Autumnal Equinox 2025 Date. Visit the royal observatory the autumnal equinox occurs in september each. Below are the dates for the first day of fall in 2025 and beyond:

The 2025 fall equinox—also called the autumn equinox—takes place on sunday, september 22, 2025. That’s the moment in time when the sun’s most direct rays are shining on the equator.