Longest Day Of The Year 2024 United States. On the summer solstice, the sun reaches the furthest south in the sky and begins its journey into the northern part of the sky. The summer solstice, also known as the june solstice arrives june 20 at 4:51 p.m.

The longest day of the year will make the dark days of winter feel like a distant memory. In 2024, summer solstice in the northern hemisphere will occur on thursday, june 20 around 4:50 p.m.