Date Of Summer Solstice In 2025. In 2025, summer solstice in the northern hemisphere will occur on thursday, june 20 around 4:50 p.m. Edt on june 20, according to timeanddate.com.

Is the solstice the longest day of the year?—and more! In 2025 the winter solstice will occur on saturday 21 december at 09.21 gmt.