Winter 2025 Date. (in the southern hemisphere, it is around june 20 or 21.) this date is considered to be the. Saturday, 21st december 2025, 1:21am.

When is the winter solstice 2025? In the northern hemisphere, the 2025 winter solstice will occur on december 21 at 09:20 gmt (december 21, 04:20 a.m.