Summer Solstice 2025 Usa. The first day of summer is also known as the summer solstice, and in 2025 it happens on thursday, june 20 at 4:51 p.m. This year, the first day of summer, also known as the summer solstice, is thursday, june 20.
When do the four seasons start in 2025โfor spring, summer, fall, and winter? Summer begins with the solstice on thursday, june 20, 2025, marking the astronomical first day of summer in the northern hemisphere.