When Is The Fall Equinox 2024. The autumnal equinox, or the first day of fall in the northern hemisphere takes place every year on september 22nd or september 23rd. In 2024, the last day of summer in the northern hemisphere is september 22!

Here are the equinox and solstice dates—plus, answers to common questions about the. The march equinox marks the beginning of spring in the northern hemisphere and the first day of fall in the southern hemisphere.