Autumnal Equinox 2024 Time. Autumn equinox 2024 (beginning of astronomical autumn) on the day of the autumn (september) equinox, the sun, moving along the ecliptic, crosses the celestial equator,. I f you are in the eastern time zone, then fall officially begins at 8:43 a.m., local time.

In 2024 the autumnal equinox will occur on 22 september at 12.44pm gmt (1.44pm bst). The 2024 fall equinox—also called the autumn equinox—takes place on sunday, september 22, 2024.