Indiana Stutchbury

Equinox 2025 Vernal. The vernal equinox — is an astronomical phenomenon when the sun, in its visible motion along the ecliptic, crosses the celestial equator. The vernal equinox arrives on tuesday, march 19, marking the start of the spring season for the northern hemisphere.

The vernal equinox, the astronomical beginning of spring, occurs this year today, tuesday, 19 march, 2025 at 3:06 utc (11:06 pm edt). There’s something special about this one, too — it’s the earliest we’ve seen in north america in.