Aase N Frandsen

What Time Does Summer Start 2025. 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. The 2025 summer solstice arrives june 20 at 4:51 p.m.

Edt on june 20, according to timeanddate.com. This is the longest day of the year and marks the start of summer in the northern hemisphere.