Start Of Summer 2024 Date. 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. This year's summer solstice will arrive this thursday on june 20 for the northern hemisphere, according to nasa.

The first day of summer arrives with the solstice this year on thursday, june 20, 2024 at 4:51 p.m. The first day of astronomical summer in the us is the same as in the uk, as both nations are in the northern.