Do you know about these things in the summer solstice?

“夏至占据几个'之最'？”“每年的夏至一定都是在6月21日吗？”“哪些成语和夏至有关？”……夏至即至，当你吹着空调、扇着扇子、 Have you ever thought about these problems when eating popsicles?

Lin Ying, a member of the Chinese Astronomical Society and an astronomical popular science expert in Tianjin, introduced that the summer solstice this summer was 17:14 on June 21. As a very important solar term in the twenty -four solar terms, the summer solstice occupies multiple "most":

It is one of the first four solar terms including the spring equinox, autumn equinox and winter solstice;

When the summer solstice is direct to the north, it is the longest day in the northern hemisphere to reach the longest day of the year;

It is a day when the northern hemisphere is the highest height at noon;

It is the day when the northern hemisphere has the most solar radiation energy;

It is the turning point of the solar movement trajectory. After this day, the position of the sun's direct shot gradually moved south, and the day of the northern hemisphere gradually shortened.

Twenty -four solar terms are divided into 24 sections, and the sun is set to a solar term every 15 degrees on the zodiac. Because the sun is not uniform on the zodiac, the length of time of each solar term is not equal. Twenty -four verses are the Gregorian calendar, and the gregs of each solar term are relatively fixed, but there will be a deviation of 1 to 3 days.

"Although the summer solstice from 2016 to 2047 was on June 21, which indicates that most of the summer solstice days of most years are on June 21, but it may also be on June 20 or June 22. For example, 2048, 2048, 2048 The summer solstice day is June 20, and the summer solstice of 2015 is June 22, "Lin Yue said.

Many idioms are also related to the summer solstice, such as immediate shadows, short -day night nights, long day and day, 4:88, etc. "The most well -known shadow immediately refers to the erection of the bamboo pole under the sun, and the shadow can be seen immediately. The metaphor has been very fast. Interesting phenomenon. Guangdong's Shantou, Conghua, Kaikai, Guiping in Guangxi and Mojiang in Yunnan are specially set up with "peeping yanghong". "Lin Ying said.

On November 30, 2016, the twenty -four solar terms of China were approved to be included in the List of the Human Intangible Cultural Heritage Sites of the UNESCO.

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