Spring Equinox 2025 Uk Location. 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. Spring begins a bit earlier if you go by the meteorological season, which is the first day of the month when an equinox or solstice takes.

Similarly, the autumn equinox marks the start of autumn as the night becomes longer. Equinox means equal day and night (12 hours each).