Fall Equinox 2024 Southern Hemisphere Calendar. It also lists astronomical sunrise and sunset timings on autumnal. The northern vernal equinox (that is, the vernal equinox in the northern hemisphere) occurs around march 21st of each year, and the northern autumnal equinox occurs around.

When do the four seasons start in 2024—for spring, summer, fall, and winter? Here’s everything you should know about the fall.