In that month of the year, the days are short and the nights are long.

Winter solstice has the shortest day and the longest night, which is 65438+February.

The winter solstice is the 22nd solar term in the "24 solar terms", and the solar calendar reaches 270 degrees. Every year, the festival is held on 65438+February 2 1-23 in the Gregorian calendar. On the solstice of winter, the sun goes south to the extreme, and the sun shines directly on the tropic of Capricorn, which is the place with the shortest day and the longest night in the northern hemisphere. From that day on, the direct point of the sun returned to the north, and the height of the sun in all parts of the northern hemisphere (China is located in the northern hemisphere) gradually increased, and the days increased day by day.

Extended data

Astronomical phenomena:

Every year in the Gregorian calendar (65438+February 2 1-23), the direct point of the sun moves southward to the extreme. On this day, the sun shines directly on the Tropic of Capricorn (23 26' s), and the sun is most inclined to the northern hemisphere, with the smallest elevation angle, which is the shortest day and the longest night in all parts of the northern hemisphere. The solstice in winter is also the turning point of direct sunlight returning to the north. After this day, it went back, and the direct sunlight began to move northward from the Tropic of Capricorn, and the northern hemisphere (China is located in the northern hemisphere) increased day by day.

Although the days from winter to the sun in the northern hemisphere are short, the temperature from winter to the sun is not the lowest, and it will not be very cold before the winter solstice, because there is still "accumulated heat" on the surface, and the real cold winter is after the winter solstice; Because of the great differences in climate in different parts of China, the climatic characteristics in the sense of astronomy and meteorology are obviously late for most parts of China. ?

Baidu encyclopedia-winter solstice

Baidu encyclopedia-winter solstice