Spring Equinox 2024 Meaning. 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. The vernal equinox, also known as the spring equinox, occurs exactly at 11.06pm eastern time on tuesday 18 march 2024.

The spring equinox, also known as the vernal equinox, occurs when the sun crosses the celestial equator, resulting in equal lengths of day and night. Spring gets its official start tuesday, march 19, 2024, in the northern hemisphere.