First Day Of Summer 2024 Date 2024. In the northern hemisphere, the next summer solstice will take place on june 20, 2024. In the northern hemisphere this year, the first day of summer is thursday, june 20, 2024.
In the southern hemisphere, it will occur on december 21, 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 planet.