First Day Of Fall 2024 Date. Bear in mind that this only applies to the northern hemisphere—if you live south of the equator, this is when spring will begin! Winter begins with the winter solstice, saturday, december 21, 2024, 4:21 a.m.
The first day of fall in the northern hemisphere is sunday, sept. The first day of autumn often called fall (september equinox or autumnal equinox) is when the sun shines directly on the celestial equator passing from north to south and the length of day and night are almost the same.