Autumn Equinox 2024 Time. Autumn 2024 starts on sunday, september 22nd in the northern hemisphere, with daylight time shortening and the leaves begining to fall with the changing tilt of the earth's axis. Its timing can change from year to year.

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, moving from the. Normally, the autumn equinox falls between 22 and 24 september, and this year the equinox occurs on 22 september at 13:44 bst.