Summer Solstice 2025 Day And Time. 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). The first day of summer (june solstice) is when the sun is in its most northern position directly over the tropic of cancer.
It happens each year when one of the earth’s poles. The summer solstice marks the first day of.