When Is Summer Solstice 2024. At the june solstice, the sun reaches its northernmost point. Edt on june 20, according to timeanddate.com.

Thursday, june 20 is the official first day of northern astronomical summer for 2024 — summer solstice — which is the longest day of the year for this half of the planet. In the northern hemisphere, the 2024 summer solstice will occur on june 20 at 20:51 gmt (4:51 p.m.