When Does Spring Officially Start In 2024 Uk. This year, the equinox takes place this wednesday, march 20. The seasons are defined as spring (march, april, may), summer (june, july, august), autumn.
The first day of spring in the uk astronomically occurs on the vernal equinox, 20 march 2025. The date for astronomical spring is wednesday 20th march 2024, ending on thursday 20th june.