When Is Summer 2024 In Usa. In 2024, the summer solstice will occur on june 20, at 20:51 gmt in the northern hemisphere, and on december 21, at 09:20 gmt in the southern hemisphere. Here are the equinox and solstice dates—plus, answers to common questions about the.

Summer begins with the solstice on thursday, june 20, 2024, marking the astronomical first day of summer in the northern hemisphere. The first official day of summer is thursday, june 20, 2024.