Solstice 2024 Summer Time. Solstice—the longest day of the year in the northern hemisphere and the shortest in the southern hemisphere—will occur on thursday, june 20, at 20:50 universal time (4:50 p.m. Edt on june 20, according to timeanddate.com.
The word solstice comes from the latin words sol (sun) and sistere (to stand still). This event marks the beginning of summer in astronomical terms.