First Day Of Fall 2024 Celebrations. Chose a month to view an observance and holiday calendar for that month in 2024. In 2024, the autumnal (fall) equinox arrives on sunday, september 22, marking the official first day of fall.
First day of autumn falls on september 22 this year. The key important dates to know for the year 2024, including holidays, celebrations, art shows, sports events, fashion week runway shows and more.