The summer solstice, the longest day of the year in the Northern Hemisphere, will take place on Friday, June 20, 2025, at 8:42 p.m. MDT. This astronomical moment marks the sun’s highest point in the sky, bringing with it the greatest amount of daylight in a single day. For ancient and modern cultures alike, the solstice has been revered as a powerful turning point, a threshold between growth and harvest, expansion and reflection.