What Day Does Summer Start And End 2024. The first day of summer is also known as the summer solstice, and in 2024 it happens on thursday, june 20 at 4:51 p.m. From an astronomical point of view, summer in the northern hemisphere officially begins on thursday, june 20 and ends on sunday, september 22.

When does summer end in 2024? Summer begins with the solstice on thursday, june 20, 2024, marking the astronomical first day of summer in the northern hemisphere.