When Does Spring Begin Uk 2024. An equinox is one of two days in the year when the sun crosses the equator and day and night become equal in length. From an astronomical point of view, summer in the northern hemisphere officially begins on thursday, june 20 and ends on sunday,.
The seasons are defined as spring (march, april, may), summer (june, july, august), autumn (september,. In the united kingdom, the beginning of spring, or spring equinox, is commemorated by welcoming the change of seasons with open arms.