When Is September Equinox 2024
When Is September Equinox 2024. 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. The september equinox occurs around september 22nd each year, marking the beginning of fall in the northern hemisphere and spring in the southern hemisphere.
It also lists astronomical sunrise and sunset timings on autumnal. In 2024, the fall equinox in the united states will occur on sunday, sept.