First Day Of Summer 2025 Usa Time Zone. In 2025, the summer solstice in the northern hemisphere will occur on june 20, 2025, at 10:42 pm edt (or 2:42 am utc on june 21). When is the first day of summer 2025?

Seasons divide the year into four distinct periods of time named spring, summer, autumn/fall, and winter. The summer solstice is also known as the longest day, which is perhaps the most notable feature.