Winter Solstice 2024 Sunset 2024. The shortest day of the year will be in 28 days, during the winter solstice on december 20, 2024, with a daylight length of 8 hours and 29 minutes. When is the first day of winter?

The shortest day of the year, in terms of daylight, is december 21, the winter solstice. So, what is the winter solstice, and why does it happen?