Shortest Day Of The Year 2025 Usa Calendar. In the northern hemisphere this date falls in december every year. The shortest day of the year, also known as the winter solstice, occurs on december 21st or 22nd in the northern hemisphere.

Winter solstice is the shortest day of year, longest night of the year and the official first day of winter in the northern hemisphere. A december solstice on the 23rd is once in a hundred years.