What Is The First Day Of Winter 2024 Usa. The winter solstice, or december solstice, occurs around december 21 or 22 in the northern hemisphere. Usually, it's march 20 or 21, but because it's a leap year and february gets an extra day, the.

21, marks the first day of winter and the shortest day and longest. It marks the northern hemisphere’s shortest day (first day of winter) and southern hemisphere’s longest.