Summer Solstice 2025 Day 2025. 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 marks the longest day of the year and the arrival of.

Why is the summer solstice the longest day of the year? In 2025 the june solstice in europe will be on saturday , 21st of june 2025, around 04:41 pm;