First Day Of Summer 2024. Solstice—the longest day of the year in the northern hemisphere and the shortest in the southern hemisphere—will occur on thursday, june 20, at 20:50 universal time (4:50. When is first day of summer in 2024 is thursday, june 20, and it lasts until sunday, september 22, inclusive.

The games are set to take place in paris beginning wednesday, running for 11 days through sept. What time does summer start 2024.