When is the solstice in winter?

The winter solstice of the Gregorian calendar is 65438+February 2 1~23 every year.

The winter solstice is a very important festival among the 24 solar terms, and it is also a traditional festival in China. As early as more than 2,500 years ago, the ancestors of China observed the sun's trajectory through the earth return, and established that the southernmost day of the sun in a year was the winter solstice. After the winter solstice, the sun gradually moved northward and the weather began to improve. People think that the solstice in winter is the day when the sun shines on the sky and the earth.

Characteristics of winter solstice

1, short sunshine time

From winter to around, although the northern hemisphere has the shortest sunshine time and receives the least amount of solar radiation, the accumulated heat on the ground in summer can also provide some supplement, so the temperature is not the lowest at this time. "After eating the winter solstice dinner, the days get longer." After the winter solstice, the days get longer and longer.

However, the solar radiation obtained on the ground is still less than the heat lost by the ground radiation, so the temperature will continue to drop in the short term. In China, except for a few islands and coastal areas, 1 is the coldest month, so there is a folk saying that winter solstice is not too cold, and astronomy also stipulates that winter solstice is the beginning of winter in the northern hemisphere.

Astronomy regards the winter solstice as the beginning of winter, which is obviously late for most parts of China. The solstice in winter is the shortest day in a year. From winter to the future, the direct point of the sun gradually moves northward, and the days in the northern hemisphere gradually become longer and the nights gradually become shorter.

2. The temperature is low and the climate is cold.

Climatically, during the winter solstice, the average temperature in the northwest plateau is generally below 0℃, and the southern region is only about 6℃ to 8℃. In addition, the winter solstice begins to count to nine, and the winter solstice becomes the first day to count to nine.