First Day Fall 2024 Uk. When does autumn start in the uk in 2024 and what is the autumnal equinox? The seasons are defined as spring (march, april, may), summer (june, july, august), autumn (september, october, november) and winter (december, january, february).
The first day of spring in the uk astronomically occurs on the vernal equinox, 20 march 2025. Find out which deadline applies to you, and what you need to do by that deadline.