Summer Solstice 20254 2025 Date. 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). It is the longest day of the year that marks the arrival of the summer season.
It marks the longest day of the year and the arrival of. When is summer solstice 2025.