September Equinox 2024 Time. The vernal equinox marks the. The september 22, 2024, equinox marks a significant astronomical event, heralding the beginning of fall in the northern hemisphere and the start of spring in the southern hemisphere.
When is the 2024 fall equinox? Normally, the autumn equinox falls between 22 and 24 september, and this year the equinox occurs on 22 september at 13:44 bst.