First Day Of Summer 2024 Date And Time. It’ll be the longest day of the year north of the equator, and it is the scientific. When is the first day of summer in 2024?

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. On thursday, everyone in the northern half of our planet will experience the summer solstice.