When Does Spring Start 2024 Uk 2024. But did you know there are actually three main definitions for the season coming from astronomy, meteorology and phenology? 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. The seasons are defined as spring (march, april, may), summer (june, july, august), autumn (september,.