Spring Equinox 2024 Nyx. When do the four seasons start in 2024—for spring, summer, fall, and winter? The spring equinox (march 19, 2024) signals the start of spring in the northern hemisphere, the beginning of autumn in the southern hemisphere, and a rare moment of equal night across the.

To find out the exact equinox time for your time zone, open the sky tonight app. On the equinoxes, the earth’s axis and orbit line up so both hemispheres get the same amount.