First And Last Day Of Summer 2024 Calendar. Summer begins with the solstice on thursday, june 20, 2024, marking the astronomical first day of summer in the northern hemisphere. Summer begins with the summer solstice, thursday, june 20, 2024, 4:51 p.m.

Summer begins with the summer solstice, thursday, june 20, 2024, 4:51 p.m. For those of us in the northern hemisphere, earth is tilting.