First Day Of Winter 2024 Usa Schedule. In 2024, the first day of winter is saturday, december 21. The season change dates are based on the spring and fall equinoxes as well as the summer and winter solstices.
We have all the details you need about the upcoming season. The winter solstice, which marks the first day of winter 2024, occurs on saturday, december 21, 2024 at 4:21 a.m.