First Day Of Winter Day 2024. It marks the shortest day and longest night of the year and the first day of the winter in. 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.

The winter solstice marks the shortest day of the year when the north pole is tilted farthest away from the sun, and so the sun is at its lowest elevation in the sky. So, what is the winter solstice and why does it happen?