Fall Equinox 2025 Dates Usa. It is also called the autumnal equinox, fall equinox. The occurrence of spring equinox usually falls on the 20th or 21st march, and the autumnal equinox falls on 22nd or 23rd september every year.
The first day of autumn often called fall (september equinox or autumnal equinox) is when the sun shines directly on the celestial. The four seasons of the year in the united states โspring, summer, fall, and winter โ are what determine the weather, the ecosystem, and the hours of daylight throughout the year.
