First Day Of Fall 2025 Events Uk. 2025 calendar with holidays and celebrations of the united kingdom. Autumnal equinox marks the end of summer and the beginning of fall.
The four seasons of the year in the united kingdom —spring, summer, autumn, and winter—are what determine the weather, the ecosystem, and the hours of daylight. The first day of spring in the uk astronomically occurs on the vernal equinox, 20 march 2025.