When Is The First Day Of Summer 2024 Uk 2024. When is the first day of summer in 2024? When is the summer solstice in 2025?

The first day of summer is also known as the summer solstice, and in 2024 it happens on thursday, june 20 at 4:51 p.m. The astronomical calendar determines the seasons due to the 23.5 degrees of tilt of the earth’s rotational axis in relation to its orbit around the sun.