How Many Days Until Summer 2025 Solstice. London the exact moment of the summer solstice in 2025 is 21 june, at. This is the longest day of the year and marks the start of summer in the northern hemisphere.
Find out the date when june solstice is in 2025 and count down the days until june solstice with a countdown timer. The first day of summer is 20 june 2025.