Summer Solstice 2024ffff. Here's everything you need to know about the northern hemisphere's longest day of the year. Summer begins with the solstice on thursday, june 20, 2024, marking the astronomical first day of summer in the northern hemisphere.
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. At the june solstice, the sun reaches its northernmost point.
