Last Day Of Summer 202 2024 In. Thursday, june 20 is the official first day of northern astronomical summer for 2024 — summer solstice — which is the longest day of the year for this half of the planet. This year, summer began on june 20 and will end on september 22.
Summer will officially arrive in the northern hemisphere on thursday (june 20) at 4:51 p.m. Last day of summer takes place on september 02 in 2024, which also is marking the federal holiday labor day in the united states.