First Day Of Fall 2025 Canada Time. In 2025, the autumnal (fall) equinox arrives on monday, september 22, marking the official first day of fall. When is the time change 2025 in canada?

Dates of all holidays and celebrations in the calendar for 2025. 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.