Is the solstice day the longest in summer and the shortest in winter?

The summer solstice (June 22nd) has the longest day, and the winter solstice (65438+February 22nd) has the shortest day.

The solstice in winter is the shortest day in a year. The winter solstice in the northern hemisphere is generally between 65438+February 2 1 and 65438+February 23. In the lunar calendar, 1 1 month is the month of winter solstice.

Every year around June 21(20th to 22nd), the sun starts at 90. This is the first definite solar term. In the 7th century BC, the ancients used earth gauges to measure the shadow of the sun, and the daylight was the shortest from the summer solstice, so it was called "the summer solstice".

Extended data:

On the solstice of summer, the sun shines almost directly on the Tropic of Cancer, which is the longest day in the northern hemisphere. The sun in the Arctic Circle and its northern region never sets all day, forming the largest polar day area.

After this day, the position of direct sunlight moved south, the days in the northern hemisphere gradually shortened, and the direction of sunrise and sunset began to move south. In the tropic of cancer and its north, the height of the sun is also decreasing at noon, and the shadow of the sun is gradually elongated. However, because the energy radiated from the sun to the ground is still much more divergent than that radiated from the ground to the air, the temperature continues to rise in a short time.

According to Xiongxian Annals in the early years of the Republic of China, traditional China people would erect eight-foot table trees in winter solstice to test the flood and drought in the coming year. There was also a criterion for judging flood and drought in the Han Dynasty, that is, "water comes when you enter, and drought comes when you retreat."

In addition, people in China will observe the changes of clouds and gases at sunrise and sunset on the solstice in winter, and judge the weather during the Spring Festival by forecasting the rain or shine. Zhejiang agricultural proverb says: "The winter solstice is sunny and the year is rotten, and the winter solstice is sunny and the New Year is sloppy." It means that there will be no rain and snow on the solstice in winter, but it will rain and snow in the Spring Festival, making the road slippery and muddy; or vice versa, Dallas to the auditorium

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