June Solstice 2025 Meaning. The summer solstice is also known as the longest day, which is perhaps the most notable feature. The first day of summer (june solstice) is when the sun is in its most northern position directly over the tropic of cancer.
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). Is it really the longest day of the year?
