Summer Solstice 2024 Date Ukas. In the northern hemisphere, the 2024 summer solstice will occur on june 20 at 20:51 gmt (4:51 p.m. It's time for the start of summer — with a full moon to boot.

Today (june 20) the summer solstice — the longest day of the year in the northern hemisphere — will begin, and it will be the earliest solstice in 228 years. In 2024 the summer solstice will occur on thursday 20 june at 21.51 bst (20.51 gmt).