Shortest Day Of The Year 2024 Usa Today. That happens this saturday, when the northern hemisphere has its shortest day and longest night of the year, and the southern hemisphere has its longest day and shortest. 21 is the winter solstice.it's the shortest day of the year and starts the coldest season.

The solstice also marks the start of the pagan holiday,. Washington — the winter solstice, the official start of winter, is on saturday, dec.