Longest Day Of The Year 2025 Uk 2024. The summer solstice is the longest day of the year, meaning the day of the year that has the most hours of sunlight. City of london, england, united kingdom.
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) On the day of the autumn (september) equinox, the sun, moving along the ecliptic, crosses the celestial.