What is the significance of the solstice in winter?

The solstice of winter is of astronomical and geographical significance;

1, astronomical significance: the winter solstice is the shortest day and the longest night in the northern hemisphere, and the shorter the day, the longer the night; It is also the day with the lowest sun height at noon all the year round;

2. Geographical significance: it is the reference of the lunar calendar. The ancients in China divided the winter solstice into three stages: first, earthworm knot; Second, wait for the elk horn to solve; Third-class spring movement;

3. Winter solstice: It is an important solar term in the China Lunar calendar and a traditional festival of the Chinese nation. Winter solstice is commonly known as the number nine, winter festival, long festival, Asian year and so on. It is the earliest of the 24 solar terms.