The autumnal equinox arrives on Monday, September 22, 2025, at 2:19 P.M. EDT, bringing with it the end of summer, the beginning of fall and the onset of Libra season. Astronomically, an equinox occurs ...
Meteorological fall begins on September 1, while astronomical fall starts on September 22 at 2:19 PM ET. Meteorological seasons are based on temperature, while astronomical seasons are based on the ...