Summer Solstice 2024 Usa Events. In north america, the first day of summer is marked by the summer solstice, which occurs this year on thursday, june 20, 2024 at exactly 3:50 pm edt. Here's everything you need to know about the northern hemisphere's longest day of the year.

The summer solstice is the date on which the sun appears to be highest in the sky. Cdt) on thursday, june 20.