Winter Solstice 2025. 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 begins to change directiion back. The winter solstice, also called the hibernal solstice, occurs when either of earth's poles reaches its maximum tilt away from the sun.
Dates of the winter solstice 2024 and surrounding years as downloadable image file. The winter solstice marks the yearโs longest night and shortest day.