What Is The First Day Of Summer 2024 Date. Summer begins with the solstice on thursday, june 20, 2024, marking the astronomical first day of summer in the northern hemisphere. The summer solstice, or the first day of astronomical summer, in chicago takes place at approximately 3:50 p.m.
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. This year, the first day of summer, also known as the summer solstice, is thursday, june 20.