The 2025 summer solstice takes place on June 20, heralding the onset of astronomical summer and the longest day of the year.

The 2025 summer solstice falls on Friday, June 20, at 10:42 p.m. ET, according to NASA and the Old Farmer's Almanac. This marks the longest day of the year in the northern hemisphere, when the Earth's tilt positions it closest to the Sun.

During the Northern Hemisphere’s summer solstice, the upper half of the earth is tilted toward the sun, creating the longest day and shortest night of the year. This solstice falls between June 20 and 22.