What Date Is Summer 2025. Is the solstice the longest day of the year?—and more! The summer solstice happens on thursday, june 20, 2025!

Summer 2025 starts on thursday, june 20th in the northern hemisphere, with the first day of summer being the longest daylight day of the year with the earth’s axis having reached its furthest tilt and begins to change directiion back. These publications offer an overview of the results being issued to students in england in the summer of 2025.