Date Of Fall Equinox 2024. According to the farmer's almanac, the exact time of the autumnal equinox in the. The autumnal equinox (as well as spring equinox) is the moment when neither of the earth’s hemispheres is inclined towards or away from the sun.
The autumnal equinox, or the first day of fall in the northern hemisphere takes place every year on september 22nd or september 23rd. An equinox is one of two days in the year when the sun crosses the equator and day and night become equal in length.