First Day Of Winter Day 2024 Calendar. Winter 2024 starts on saturday, 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 academic calendar contains detailed information about programs, requirements, and courses.

In the northern hemisphere, it always occurs around december 21 or 22. So, what is the winter solstice and why does it happen?