First Day Of Summer 2024 Time. It's still technically summertime yet here i am in both of. In the southern hemisphere, it will occur on december 21, 2024.
The first day of summer is also known as the summer solstice, and in 2024 it happens on thursday, june 20 at 4:51 p.m. Here’s everything you need to know about the northern hemisphere’s longest day of the year.