Longest Day Of The Year 2025. The summer solstice occurs in june in the northern. The summer solstice is a natural astronomical event that happens when the earth’s axial tilt is at its maximum.
Summer 2025 starts on friday, 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. The summer solstice is the day with the longest period of daylight and shortest night of the year in that hemisphere, when the sun is at its highest position in the sky.