Autumnal equinox, or “First Day of Fall”, is September 22 - whnt.comwhnt.comAutumnal equinox, or “First Day of Fall”, is September 22whnt.comAfter three sizzling months, the Earth's trip around the sun now brings it to the point of the autumnal equinox, or the first day of fall. For the Tennessee Valley, the autumnal equinox will take place at 9:21 a.m. Thursday, September 22. The word ...First Day Of Fall Will Feel Like SummerHartford CourantWhen is the first day of fall? Equinox signals start of new seasonAL.com5 things you may not have known about the first day of fallWFTV OrlandoThe Weather Channel -Latin Timesall 79 news articles »