Some people say that "the winter solstice is not a holiday", while others say that "the winter solstice is as big as a year". Is the winter solstice really important?

According to the calendar, the solstice in winter is nothing important or unimportant.

Judging from the 24 solar terms, the winter solstice is still a representative day, because the winter solstice is the shortest day. After this day, the days will get longer and longer, because:

Winter solstice is a solar term divided by astronomy, which was called "short day" and "short day" in ancient times. From winter to the sun, the sun is located at 270 degrees of the Yellow Meridian, and the sun shines almost directly to the Tropic of Capricorn, which has the shortest day in the northern hemisphere.

There is no 10 hour from sunrise to sunset in most parts of southern China. From winter to the future, as the earth orbits the sun, the direct sunlight belt gradually moves northward, making the days in the northern hemisphere gradually longer and the nights gradually shorter.

Although the height of the reference sun is the lowest and the sunshine time is the shortest in winter solstice, the heat absorbed by the ground is more than the heat lost. After the winter solstice, it begins to count to nine, and every nine days is a "nine". Before and after "March 9th", the area was the least hot and the weather was the coldest, so it was said that "March 9th was cold".

Astronomy regards the winter solstice as the beginning of winter, which is obviously late for most parts of China. During the winter solstice, the average temperature in the northwest plateau is generally below 0℃, while it is only about 6℃ to 8℃ in the south. In the low-altitude valley areas in the northwest and south, even in the coldest local area of 65438+1early October, the average temperature is still above 10℃, so it can be said that autumn comes and spring comes, and there is no winter all year round.