Summer Solstice Ii 2024. But why does this happen, and what is the summer solstice? 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, which is when the sun reaches the most northerly point in the sky, is set to occur tonight at 21:50 bst/22:50 cest. And the solstice is set to get.