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What does 202 1 summer solstice mean? What does 202 1 summer solstice mean?

The approach of heat means that the hot summer is coming.

1, summer solstice, as one of the 24 solar terms, is the first solar term to be determined. On the solstice in summer, the day is the longest and the night is the shortest. The representative means that the summer heat is coming, and its climate characteristics are heavy rain, rainy weather and high temperature sauna.

2. In the 7th century BC, the ancestors measured the shadow of the sun with earth gauges and determined the summer solstice. "Zunxian Manuscript" records: "The sun arrives in the north, the days are long and the shadows are short, so it is called the summer solstice. At best, it is excellent. " Generally speaking, the name of the summer solstice only represents the solar terms of the summer solstice, which means that the hot summer is coming.

On the day of summer solstice, the position where the sun directly hits the ground reaches the northernmost part of the year, almost directly on the tropic of cancer. In Beijing, the daytime is about 15 hours. On this day, the northern hemisphere gets the most sunshine, almost twice as much as the southern hemisphere. It is the longest day and the shortest night in the whole summer, usually June 2 1-22.

After the summer solstice, the time of each day is gradually shortened. Astronomers say that the summer solstice is the turning point of the sun. After this day, it will go back and start moving south directly. After the summer solstice, the daytime time in the northern hemisphere gradually decreases. At the same time, after the arrival of the summer solstice, the stars in the night sky gradually become Xia Xing. In ancient times, there was a saying that "the summer solstice is rotten, and the rain is rainy." Summer solstice is the yellow ripening period of plums in Jiangnan, and it is also the rainy season in Jianghuai area. This also means that during the summer solstice, the temperature in most parts of China is high, crops grow rapidly, and there is more physiological and ecological water demand. At this time, the precipitation has a great influence on agricultural output, and there is also a saying that "raindrops are worth thousands of dollars on the summer solstice". After the summer solstice, the air convection is strong, and thunderstorms often form in the afternoon to evening.

As the saying goes, "the winter solstice is in the jiaozi", and when it comes to the summer solstice, this bowl of "summer solstice" is the most indispensable. Summer solstice noodles are a custom of Han nationality, which is very popular in most parts of the country. Pan Qingrong-bi's "Ji Sheng at the Age of Emperor Jing" records that "it is the day when furniture eats cold noodles, that is, it is also called water surface." There is a folk proverb that "eating noodles on the solstice in summer will shorten the day". Although summer solstice is not the hottest time in summer, it means that hot summer has arrived. People began to change their diet from the solstice of summer, taking low-calorie, easy-to-make, cool food as the main diet, and noodles are usually the first choice for ordinary families. Therefore, the summer solstice is also called "subduction surface".

6. The summer climate is hot, and people's digestive function is relatively weak. So the diet should be light and not greasy. Eat more miscellaneous grains, do not eat hot food, and avoid helping heat; Eat fruits and vegetables in moderation, not too much, so as not to hurt the spleen and stomach; Thick and greasy products should be less than much, so as not to turn heat into wind and stimulate the treatment of sores.