When Is The First Day Of Summer 2025 Datev. In the northern hemisphere, the winter solstice occurs every year. The 2025 winter solstice is here:
This year, the first day of summer, also known as the summer solstice, is thursday, june 20. 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.