Winter Solstice 2025 Time Est. 2025 / 9:19 am est /. The 2025 winter solstice — the precise moment when the sun appears farthest south in the sky — is at 4:21 a.m.
The earth’s tilt of approximately 23.5 degrees on its axis is the primary reason for. The first day of winter is marked by the winter solstice, which occurs when the earth’s axis tilts farthest from the sun.