When Does Summer 2024 Officially Begin. This event marks the beginning of summer in. In 2024, the summer solstice will occur on june 20, at 20:51 gmt in the northern hemisphere, and on december 21, at 09:20 gmt in the southern hemisphere.

The first day of summer, also known as the summer solstice, will arrive on thursday, june 20, according to the old farmer’s. Fall starts at the moment when the sun is directly over the equator, going from north to.