Spring And Fall Equinox 2025 Schedule. Thursday, mar 20 5:01 am edt. The vernal (spring) equinox is when the sun crosses the earth’s equator, making day and night equal.

The spring equinox officially marks the beginning of spring in the northern hemisphere, and there are celebrations around the world to usher in longer days and. For those of us in the northern hemisphere, this was marked by the arrival of the vernal.