Fall 2025 Start Date. Check out the 2025 calendar dates for holidays, big games, movie releases, award shows and more. Us stocks dropped sharply monday — and chipmaker nvidia lost nearly $600 billion in market value — after a surprise advancement from a chinese artificial intelligence.

August 28 (tentative) fall drop/add ends; Autumn 2025 starts on monday, 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.