Summer And Winter Solstice 2024 Date. Thursday, june 20 is the official first day of northern astronomical summer for 2024 — summer solstice — which is the longest day of the year for this half of the planet. The summer solstice occurs in june in the northern hemisphere and marks.

Find the answers to common questions, like: In 2024 the summer solstice will occur on thursday 20 june at 21.51 bst (20.51 gmt).