How Many Days Until The Fall Equinox 2024. In 2024, the autumnal (fall) equinox arrives on sunday, september 22, marking the official first day of fall. Autumn equinox 2024 (beginning of astronomical autumn) on the day of the autumn (september) equinox, the sun, moving along the ecliptic, crosses the celestial equator, moving from the northern hemisphere to the southern.
This sunday, the autumnal equinox is upon us, and with it, a shift to shorter days, longer nights and the astronomical start of fall in the northern. 22, will depend on where you live:
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