When Is The First Day Of Fall 2025 Canada. 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. Spring equinox 20 march, summer solstice 20 june, autumn equinox 22 september, winter solstice 21 december.

The first day of fall 2025 arrives with the fall equinox on monday, september 22, 2025, 2:19 p.m. These are mandatory public holidays in canada, such as canada day and thanksgiving.