2025 Winter Solstice App. In the northern hemisphere, the winter solstice will occur on december 21, 2025 at 09:20 gmt (december 21, 04:20 a.m. Meanwhile, at the summer solstice, the northern hemisphere is toward the sun, leading to the longest day and shortest.

In the northern hemisphere, the winter solstice will occur on december 21, 2025 at 09:20 gmt (december 21, 04:20 a.m. But daylight saving isn’t to blame;