When Is Spring Uk 2025 Dates. Spring 2025 starts on thursday, march 20th in the northern hemisphere, with daylight time lengthening and the leaves begining show on the trees with the changing tilt of the earth's axis. The first day of spring in the uk astronomically occurs on the vernal equinox, 20 march 2025.
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. Calendar with 2025 celebrations and holidays of the united kingdom.