Autumn Equinox 2025 Observances 2025

Autumn Equinox 2025 Observances 2025. Edt (12:44 utc), according to the national weather service. The first day of autumn is in 2025 on september 22 (according to the astronomical definition).

The autumnal equinox (in the northern hemisphere) takes place this afternoon (sunday 22nd september 2025) at 13.44 irish summer time (12.44 ut). 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.