First Day Of Summer 2024 Time

First Day Of Summer 2024 Time. 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. June 20, 2024 (summer solstice).

Scientists have two ways of measuring seasons: “solstice” means the sun has gotten as high in the sky as it’s going to get for the year;