First Day Winter 2025. The day has the shortest period of daylight and the longest night of the year. In 2024, the first day of winter is saturday, december 21.

Find out the date when winter is in 2025 and count down the days until winter with a countdown timer. January 1, 2025 new years day january 6, 2025 new student orientation january 7, 2025 new student orientation january 8, 2025 start of classes (1st day) january 15, 2025.