Introduction of light snow solar terms

The light snow solar terms are introduced as follows:

Light snow is the twentieth of the twenty-four solar terms. Every year1October 22nd or 23rd, 165438+, when the sun reaches 240 degrees of the longitude of the Yellow River, it is a light snow solar term. Wang, a scholar in the Ming Dynasty, wrote in his famous book Qunfangpu: "The light snow is cold and it will snow, but the ground is not even cold and the snow is not heavy."

In other words, before and after the light snow solar terms, it began to snow because of the cold weather. However, because "the ground is not very cold", the snowfall at this time will not be great, so it is called "light snow". Like Spring Rain and Grain Rain, light snow is also a solar term related to precipitation.

First of all, the climate of light snow

The ancients divided each of the 24 solar terms into three equal periods, with a period of five days, thus describing the climate change characteristics of each solar term with three periods. The third phase of Xiaoxue is: "The rainbow disappears in an instant; The next day is falling; Three times are blocked in winter. "

The disappearance of the rainbow can also be understood as rain. In other words, when entering the light snow solar term, the form of precipitation gradually changes from rain to snow, and it no longer rains in the sky, so naturally there will be no rainbow.

It rises and falls the next day, which embodies the ancient concept of yin and yang. The sky is yang, the earth is yin, and the yang rises and is gloomy. Yin and Yang no longer intersect, and there is natural silence between heaven and earth. This is actually the ancient people's understanding of climate and life.

The three seasons are sealed as winter, yin and yang are separated, and everything is silent. If beginning of winter means entering the threshold of winter, then light snow can mean the official arrival of winter. Winter in ancient times was much more difficult than today. There are no birds and animals between heaven and earth. After sowing the last winter wheat, people also hid in the house and began to spend the winter. The so-called "blocking the winter" is exactly what it means.