What Is The Shortest Day Of The Year 2025. During summer the day of the solstice is the longest day of the year and during winter the day of the solstice is. For the southern hemisphere, however, it marks the longest nights and shortest.
In the northern hemisphere, the next summer solstice will take place on june 21, 2025. The shortest day can occur on december 20, 21, 22, or 23.