First Day Of Winter 2025 Uk. Share your predictions of what 2025 will bring. Winter 2025 starts on sunday, december 21st in the northern hemisphere, with the first day of winter being the shortest daylight day of the year with the earth's axis having reached its furthest tilt away from the sun and.
There are then 364 days left in 2025. There is a third definition used in some parts of the uk, particularly northern ireland: