Fall Equinox 2025 Time And Date In The Us. 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. In different time zones, the date of the equinox may differ by a day, so it is important to indicate your exact location.
What is the fall equinox? The 2025 september equinox will fall at 18:19 utc (1:19 p.m.