When Is The 1st Day Of Fall 2024. The first day of fall this year, also known as the autumnal equinox is sunday, sept.  — sacramento will lose roughly a minute of sunlight each day in september.

The autumnal equinox, or the first day of fall in the northern hemisphere takes place every year on september 22nd or september 23rd. On that day, the autumnal equinox will occur, marking the beginning of fall.