Today's winter solstice, how to understand "nine cold days"?

"The ultimate hidden gas is extreme at this point." The solstice of winter, as the name implies, means that winter has really come. After the winter solstice, the climate in all parts of China will enter the coldest stage, which is often referred to as "nine days in" and "several cold days". From now on, it will be a "nine" every nine days, and it will be a "nine" after 998 1 day.

"After eating the winter solstice meal, it will grow a line every day." Winter solstice is the 22nd solar term among the 24 solar terms, and it is also a traditional folk festival in China. Many places in China have the custom of winter solstice festival. There are great differences between the north and the south in the customs of winter solstice: there are customs of ancestor worship and feasting in the south of China, and there are customs of eating jiaozi in the north of China, and there are places to eat mutton soup and eight-treasure porridge on this day ... Winter solstice has arrived. What are the customs in your hometown? "The weather and people are urging each other every day, and the winter solstice is coming again." Winter solstice is the fourth solar term in winter, and it is also an important festival. People always say that the solstice in winter is as big as a year.

The ancients believed that the winter solstice is an important solar term for the transformation of yin and yang, representing the beginning of the next cycle, and it is a good day, and "counting nine" began from now on. Jiaozi, glutinous rice balls and other foods are "seasonal meals" at this time, and the pace of the New Year is approaching. The winter solstice is one of the 24 solar terms, which is opposite to the summer solstice, and the time is around 65438+February 22 of the Gregorian calendar every year. At this time, the sun reached 270 degrees.

On the solstice in winter, the direct sunlight reaches the southernmost point of the year, almost directly on the tropic of Capricorn. On this day, the northern hemisphere gets the least sunshine and the shortest day. The farther north, the shorter the day.

Similarly, it is also because the sun has the lowest height and the shortest sunshine time from winter to morning, and the heat absorbed by the ground is less than the heat lost, so the weather is generally cold. Count to nine from the solstice in winter, and every nine days is a nine. By the time of "99", the weather turned warmer, and most parts of the country entered spring, which is also commonly known as "99 sunny day".