When is the solstice in winter?

Winter solstice is one of the 24 solar terms, with the shortest day and the longest night in the northern hemisphere. So, do you know when the winter solstice is?

Winter solstice (Gregorian calendar 65438+February 2 1-23), the cold winter is coming. The winter solstice is one of the 24 solar terms, indicating the change of seasons. It is based on the change of the position of the earth on the ecliptic (that is, the orbit of the earth around the sun).

Winter solstice is one of the eight festivals in a year. In ancient times, there was a custom of "eight festivals" to worship the gods and ancestors. Winter solstice is regarded as a big holiday in winter. There is a folk saying that winter solstice is as big as a year, so the ancients called it "sub-year" or "off-year".

In some coastal areas in southern China, the traditional custom of worshipping ancestors from the winter solstice is still continuing. In some areas of northern China, it is a custom to eat jiaozi every winter solstice.

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Astronomical significance

According to modern astronomical science, during the winter solstice, the sun moves to 270 (winter solstice), and the position where the sun directly hits the ground reaches the southernmost point of the year. The sun shines almost directly on the tropic of Capricorn (also known as the winter solstice daily line), and the sun is most biased towards the northern hemisphere.

Therefore, the winter solstice is the shortest day and the longest night in the northern hemisphere. The shorter the day, the longer the night. The winter solstice is the southernmost day of the sun in a year, and it is also the limit of the sun's southward travel.

During the winter solstice, the northern hemisphere gets the least solar radiation, about 50% less than the southern hemisphere. After the winter solstice, the stars in the night sky are completely replaced by the stars in winter. From today, they will enter the ninth. At this time, the southern hemisphere is in a hot summer.