Autumn Equinox 2024 Countdown Timer. The online calculator determines the time and date foe summer and winter solstice and spring and autumn equinox. A carefully worded answer is that on sunday, sept.

Autumn / fall equinox 2024 the autumn or fall equinox signals the end of summer on the astronomical calendar. In the northern hemisphere, the autumnal equinox happens on september 22, 2024, at 12:44 gmt (08:44 a.m.