Farmers Almanac 2025 2025 Winter Solstice. When do the four seasons start in 2025—for spring, summer, fall, and winter? For those of us in the northern hemisphere, the earth tilts mostly toward the sun during this time.

As you read the highlights, remember that you can always find out which planets are visible each night with the almanac’s visible planets calculator. In 2025, the first day of winter is saturday, december 21.