Fall has arrived: Here's what to know about the autumnal equinox

SHREVEPORT, La. (KTAL/KMSS) -- The autumnal equinox is considered the first day of fall, but it'sso much more than that.
The word equinox comes from two Latin words: "aequus," meaning equal, and "nox," meaning night, the National Weather Service explains on its website.
According to Britannica, the fall equinox is one of two moments in the year when the sun is exactly above the equator. The celestial event happens annually around Sept. 22 or Sept. 23 in the Northern Hemisphere and on March 19 or