What Is The Shortest Day Of 2025. In 2025, the shortest day of the year is now only weeks away, taking place on saturday, december 21. The winter solstice marks the official start of the astronomical winter, as the sun reaches its most southerly point in the sky as seen from earth.
It will be both the shortest day and longest night of 2025. The shortest day can occur on december 20, 21, 22, or 23.