What Is Summer Equinox 2024. In 2024 the summer solstice will occur on thursday 20 june at 21.51 bst (20.51 gmt). Summer solstice 2024 (beginning of astronomical summer) on the day of the summer (june) solstice, the solar disk, moving along the ecliptic, will fall into its northernmost.
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. Read on for what to know about the 2024 summer solstice, including when it takes place this year and how to celebrate the astronomical event.