When Is The Vernal Equinox 2025. Here are the equinox and solstice dates—plus, answers to common questions. On march 19, the vernal equinox will see spring come to the northern hemisphere as the sun reaches the spot where the ecliptic and celestial equator cross each other.
The spring equinox, or the vernal equinox as it is more formally known, marks the astronomical start of spring, when the sun passes north over the celestial. The 2025 september equinox will fall at 12:44 utc (7:44 a.m.