Official Start Of Winter 2025 Calendar. 21, marking the official beginning of winter and ushering in the season’s characteristic cold fronts and holiday traditions. Winter 2025 starts on saturday, december 21st in the northern hemisphere, with the first day of winter being the shortest daylight day of the year with the earth's axis having.
When is the first day of winter in 2025? When do the four seasons start in 2025—for spring, summer, fall, and winter?