First Day Winter 2024. But what's the science behind the. The old farmer’s almanac is an astronomical “calendar of the heavens,”.
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. A frost date is the average date of the last light freeze in spring or the first light freeze in fall.