When Is The First Day Of Spring 2025 Uk. But did you know there are actually three main definitions for the season coming from astronomy, meteorology and phenology? 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 first day of spring in 2025? It is also the point in the calendar where the day length is more or less equal to the.