First Day Of Autumn Day 2024. Using this method, autumn begins on september 23, 2022, and ends on december 22, 2022, when it gives way to winter. The seasons are defined as spring (march, april, may), summer (june, july, august), autumn.

In 2024, the autumnal (fall) equinox arrives on sunday, september 22, marking the official first day of fall. On that day, the autumnal equinox will occur, marking the beginning of fall.