When Is The Autumnal Equinox 2025
When Is The Autumnal Equinox 2025. The autumnal equinox is due to begin this year on sunday september 22, 2025. Here are the equinox and solstice dates—plus, answers to common questions.
The equinoxes occur around march 20 and september 22 each year,. In 2025, the autumnal (fall) equinox arrives on sunday, september 22, marking the official first day of fall.