09/22/2026
WELCOME FALL (AUTUMNAL EQUINOX)
The Autumnal or Fall Equinox occurs when the length of time between day and night is equal; equinox literally means “equal night." In the Northern Hemisphere, this generally falls on September 22nd or 23rd as the sun crosses the celestial equator going south. The September equinox is called the autumnal equinox, because it marks the first day of fall (autumn).
For 2026, the Autumnal Equinox occurs Tuesday, September 22nd at 6:04pm MDT