What Day Is The First Day Of Fall 2025. The first day of fall 2025 arrives with the fall equinox on monday, september 22, 2025, 2:19 p.m. The september or autumnal equinox is when the sun crosses the celestial equator, moving from.
Does spring begin on march 1? This tool is used to find the first day of autumn (fall) of a given year.