Summer Solstice Dates 2025. Edt (2051 gmt), and the summer solstice for the southern hemisphere occurs on dec. On thursday, everyone in the northern half of our planet will experience the summer solstice.
Here’s everything you need to know about summer solstice 2025. Thursday, june 20 is the official first day of northern astronomical summer for 2025 — summer solstice — which is the longest day of the year for this half of the.