Winter 2025 Calendar. 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. Winter 2025 key academic dates & other important dates the key academic dates found below are those approved by senate in may 2022.
Based on the outlook discussion, hereโs the early winter 2024/25 outlook. Online calendar of holidays and days off in united states for the winter of 2025.