The autumnal equinox marks the start of astronomical autumn in the Northern Hemisphere, occurring on September 22 or 23 depending on the source

ScienceSep 22 at 3:28 AM – Sep 22 at 12:24 PM4 outlets

The Independent

What is the autumnal equinox – and when does it take place? Sep 22 at 3:28 AM

ABC7 Los Angeles

Sept. 22 is the autumnal equinox: What to know as fall officially arrives Sep 22 at 7:55 AM

ABC7 New York

Fall is here! What to know about the autumnal equinox seen Sep 22 at 8:23 AM

NBC Chicago

When does fall start? All about the 2026 autumnal equinox seen Sep 22 at 12:24 PM