What Is The First Day Of Winter 2025 Called. The winter solstice, also called the hibernal solstice or midwinter,. When do the four seasons start in 2025—for spring, summer, fall, and winter?

Learn all about the shortest day of the year—and tell us what winter means to you! Though no world body has decreed it, we in the northern hemisphere will celebrate the first day of winter at this solstice.