Official 1st Day Of Summer 2024. The true solstice will arrive in the northern hemisphere at exactly 4:51 p.m. The first day of summer this year is thursday, june 20, 2024, per the almanac.

In 2024 the summer solstice will occur on thursday 20 june at 21.51 bst (20.51 gmt). And how do the words summer solstice tie in?