Spring Equinox 2025 Dates And Times. Spring equinox 2025 (beginning of astronomical spring) on the day of the spring (march) equinox, the sun crosses the celestial equator, moving along the ecliptic. When is the spring equinox in 2025 and why does its date change?

On this date, the day is equal. Never miss a rocket launch, meteor shower, eclipse or other event that’s out of this world.