Summer 2024 Date End. 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. Summer 2024 starts on thursday, june 20th in the northern hemisphere, with the first day of summer being the longest daylight day of the year with the earth's axis having reached its furthest tilt and begins to change directiion back.
In 2024, the summer solstice will occur at 4:50 p.m. It signals the beginning of astronomical summer north of the equator and winter in the southern hemisphere.