Winter 2025 Start Date. Summer begins with the summer solstice, thursday, june 20, 2025, 4:51 p.m. 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.
Find out the date when winter is in 2025 and count down the days until winter with a countdown timer. Here’s what you need to know about the start—and end—of winter 2025: