When Is Fall Equinox 2026?

Fall Equinox 2026 falls on Wednesday, September 23, 2026 — 24 days from now. Live countdown, dates through 2030, and how the date is set.

The September equinox (or southward equinox) is the moment when the Sun appears to cross the celestial equator, heading southward. Because of differences between the calendar year and the tropical year, the September equinox may occur from September 21 to 24. The September equinox falls on September 22 or 23.

Fall Equinox falls on Wednesday, September 23, 2026. The countdown above updates live, so you always see exactly how many days, hours, and minutes are left.