What Is The Longest Day Of 2024. Edt (2051 gmt), marking the longest day in the northern hemisphere. The summer solstice, also known as the june solstice arrives june 20 at 4:51 p.m.
This year, midsummer falls on june 24th 2024. The summer solstice for the northern hemisphere occurs on june 20, 2024, at 4:51 p.m.