What Day Does Winter Start 2024. 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. 21, in the northern hemisphere, according to.

The winter solstice occurs in december, and in the northern. The winter solstice heralds the astronomical start of winter and marks the day with the fewest hours of daylight for the year.