First Day Summer Day 2024 Calendar. Edt (2051 gmt), and the summer solstice for the southern hemisphere occurs on dec. 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 ‘longest day’ and ‘shortest night’ of the year. That also happens to be the summer solstice, aka.