First Day Of Fall 2025 Date And Time Usa. Find out the date, how long in days until and count down to till autumn (or fall) 2025 with a countdown clock. This year the autumn will start on sunday september 22, 2025 (day of the fall equinox) and will end on saturday december 21, 2025 with the winter solstice.

[1] january 20th is inauguration day. What is the fall equinox?