Spring Equinox 2025 Dates Usa. On this date, the day is equal in length to the night. The spring equinox 2025 is a significant astronomical event that marks the beginning of spring in the northern hemisphere and autumn in the southern hemisphere.
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 do the four seasons start in 2025โfor spring, summer, fall, and winter?
