Summer Solstice 2025 Sunset Time. Summer solstice, the two moments during the year when the path of the sun in the sky is farthest north in the northern hemisphere (june 20 or 21) or farthest south in the southern hemisphere (december 21 or. Here's why this day is the longest day of the year, with the most hours of daylight.

Find out what the winter solstice is and why our. The stones of stonehenge have silently marked the winter solstice for thousands of years.