There is a folk proverb that "eating noodles on the solstice in summer will shorten the day". On this day, the sun shines directly on the Tropic of Cancer at 23 26 north latitude. At noon, the height of the sun is 90, which is the longest day of the year. From this day on, the direct point of the sun began to move south from the tropic of cancer, and the days in the northern hemisphere will gradually decrease, that is to say, the days will become shorter day by day.
On the day of the summer solstice, except the south pole of the Antarctic circle and the polar night area, the sunrise direction in all parts of the earth starts from the northeast and sets in the northwest. The summer solstice is the northernmost day of the sun in a year and the limit of the sun's northward movement. On this day, the northern hemisphere gets the most solar radiation, almost twice as much as the southern hemisphere.
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Summer solstice custom:
Summer solstice coincides with the harvest season of crops. Since ancient times, people have had the custom of celebrating harvest and offering sacrifices to ancestors at this time in order to pray for a good year. Therefore, the summer solstice, as a festival, was included in the ancient ritual of offering sacrifices to the gods. As the ancient book says: "Heaven and earth are the foundation of life; Ancestors are the foundation of class. " It means that heaven and earth are the foundation of life, ancestors are the foundation of human beings, and ancestor worship is the custom of inheriting filial piety.
There is also the custom of eating noodles on the solstice in summer. Since ancient times, there has been a saying in China that "winter solstice wonton, summer solstice", so people in many areas south of the Yangtze River regard eating noodles in summer solstice as a very important custom. The solstice of summer represents the arrival of hot summer, and people's diet should also be changed, with low-calorie and easy-to-make foods as the mainstay.
Noodles are usually the first choice for families, so summer solstice noodles are also called "sleeping noodles". Another reason is that noodles from summer to morning are basically new flour ground from new wheat. Fresh flour has higher nutrition and better taste.