The summer solstice occurs when the sun reaches its highest and northernmost point, resulting in the longest day of the year. Summer 2025 will last approximately three months, ending on Sep. 22.

This year, the summer solstice in the Northern Hemisphere occurs at 02:42 UTC on Saturday, June 21, 2025. That means it's at 10:42 p.m. EDT on Friday, June 20 and at 3:41 a.m. BST on Saturday ...