Longest Day Of Summer 2025. The longest day, also known as the summer solstice, is a festive celebration that takes place when the sun shines brightest and longest in the sky. At the june solstice, the sun reaches its northernmost point.

Ask a question or make a comment. Countdown to the longest day of the year summer solstice in the northern hemisphere countdown to 20th june 2025 at 9:44pm (europe/london time)