First Day Of Autumn 2024 Time Lapse. 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. The earth’s fixed tilt as it orbits the sun leads to this day.

Here’s what to know about this year’s autumnal equinox. Here’s everything you should know about the fall equinox—plus our.