When Does Fall Start 2024 Time. At a precise moment each september, usually on the 22nd or 23rd, the sun is directly above the equator, marking the autumnal equinox. In 2024, these are the astronomical dates and times for the start of each season:
The amount of daylight has. Autumn 2024 starts on sunday, september 22nd in the northern hemisphere, with daylight time shortening and the leaves begining to fall with the.