Fall Equinox at Cahokia Mounds

  • Location: Cahokia Mounds State Historic Site, Ramey Street, Collinsville, IL, USA (View on Google Maps)
    • Start Date: September 21, 2025
  • Start Time: 6:30 am

We celebrate the fall Equinox in 2025 on Sunday, September 21 when night are nearly equal in length, marking the official start of fall in the Northern Hemisphere. It’s a moment when the sun crosses the celestial equator, heading southward, and signals cooler days and longer nights ahead.

More: https://cahokiamounds.org/events/2025-fall-equinox/

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Fall Equinox at Cahokia Mounds