What Is The Last Day Of Summer 2024 Date. June 21 is the day of summer solstice in 2024, marking the longest day in the year. In the northern hemisphere, the next summer solstice will take place on june 20, 2024.

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. The true solstice will arrive in the northern hemisphere at exactly.