When Is Summer Solstice 2025 Uk. When is the spring equinox? 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).

Summer 2025 starts on friday, june 20th in the northern hemisphere, with the first day of summer being the longest daylight day of the year with the earth’s axis having reached its furthest tilt and begins to change. A solstice is the day when the sun is at its highest or lowest point in the sky.