What is the summer solstice? What is the origin of the summer solstice?
Solstice is the earliest of the 24 solar terms. In the 7th century BC, the shadow of the sun was measured by civil soil gauge, thus the summer solstice was determined. The annual summer solstice begins on June 2nd1day (or 22nd) and ends on July 7th (or 8th). According to "Zunxian Manuscript", "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. " On the day of summer solstice, the sun directly reaches the northernmost part of the year, almost directly to the Tropic of Cancer (23 26' north latitude), and the daytime in the northern hemisphere reaches the longest, and the farther north it is, the longer it is.
In ancient China, the summer solstice was divided into three phases: "The first phase of staghorn dissolution; Second, wait for cicadas to start singing; Third-class Pinellia ternata. " Although elk and deer belong to the same family, the ancients thought they belonged to yin and yang. The deer's horn faces forward, so it belongs to Yang. On the solstice of summer, Yin Qi was born, and Yang Qi began to decline, so the front antlers began to fall off.
June 2 1 or 22 of the Gregorian calendar every year is the summer solstice, which means that the hottest summer has arrived.
On the day of the summer solstice, the sun reaches 90 degrees of the yellow meridian and goes straight to the Tropic of Cancer. This is the longest day and the shortest night in a year in the northern hemisphere, so the summer solstice is also called the long solstice.
At noon that day, the sun shadow was measured by standard gauge. The length of the sun shadow was one foot, four inches and two minutes, equivalent to 0.365 meters today, which was the shortest day in a year. At night, observations show that the Big Dipper points to noon, which is due south. This stage is usually in May of the lunar calendar, also called noon and midsummer.
Twelve news hexagrams are hexagrams, and the hexagrams "hexagrams" mean that they have been generated underground, and "summer is born in Yin". From this day on, the sunshine time will be shorter every day.
Three stages of summer solstice
The summer solstice is divided into three stages. "At first, the antlers will dissolve." At this time, the rough epidermis on the antlers will fall off. "When cicadas sing", cicadas are also called cicadas, commonly known as cicadas. At this stage, cicadas "know" by chirping in the shade. "Third-class Pinellia ternata", Pinellia ternata is a kind of Chinese herbal medicine, which began to emerge in this period, so it has just passed half a summer, so it is called Pinellia ternata. Another Chinese herbal medicine is called summer solstice grass, also called naked light, which can be used as medicine at this time. Prunella vulgaris is now growing vigorously, and it will take more than 20 days to be used as medicine.
Agricultural activities in summer solstice
From summer to Sunday, the weather is hot and humid, and crops grow vigorously. At this time, farm work is mainly field management. First of all, timely irrigation and fertilization are needed to supplement water and nutrients for fast-growing crops. Secondly, we should seize the time to cultivate and weed to prevent weeds from competing with crops for water and fertilizer. Agricultural proverbs say, "Weeding in cotton fields in summer is like a poisonous snake biting people", "If you don't hoe the ground in summer, you will starve in winter". In most parts of China, when many crops need to be planted in summer solstice, there are still many pests in the field. We can weed and sow at the same time to control pests. At this time, all kinds of autumn fruit trees need serious fruit protection and insect prevention to improve fruit quality.
Characteristics of summer solstice weather
There will be many thunderstorms when summer comes. This kind of rain comes and goes quickly, and the range may not be very wide, but the rainfall is generally relatively large. When it rains, it is often accompanied by strong winds and lightning. Every year, people and animals are injured by lightning, and some lightning can also cause fires. Therefore, lightning protection and rainstorm prevention should be combined with flood control in summer.
Summer solstice season is the "Meiyu" season in Jianghuai area. This is the yellow ripening period of plums in Jiangnan. The air is very humid. Cold and warm air masses meet here, forming a trough of low pressure, leading to rainy weather. In this weather, the utensils are moldy and the human body feels uncomfortable. Some mosquitoes breed quickly, and some intestinal bacteria are easy to breed. At this time, we should pay attention to drinking water hygiene and try not to eat cold food to prevent the occurrence and spread of infectious diseases.
What do you eat in the 24 solar terms during the summer solstice?
As the saying goes, "noodles are served in jiaozi in winter and in summer", and eating noodles in summer is a custom in many places. "Eating noodles in the summer from solstice will shorten the day." Eating noodles in the summer from solstice is a custom of Han nationality, which is very popular in most parts of the country. On the solstice of summer, there is a saying about eating noodles. Although summer solstice is not the hottest time in summer, it means that hot summer is coming. 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".
What's the difference between solstice summer and long summer?
Long summer is the seventh solar term in the twenty-four solar terms of the lunar calendar and the first solar term in summer, which indicates the official start of the summer season. When the sun reaches 45 degrees of the yellow meridian, it is the solar term of long summer. The bucket refers to the southeast, and the dimension is long in summer. Everything has grown to this day, hence the name Long Summer.
Summer solstice is one of the 24 solar terms, which occurs on June 20th, or 2 1, or 22nd of the Gregorian calendar every year. On the day of summer solstice, the sun moves to 90 degrees of the yellow meridian (summer solstice, currently in Gemini), and the position where the sun directly hits the ground reaches the northernmost point of the year, almost directly to the Tropic of Cancer. At this time, the daylight hours in all parts of the northern hemisphere reach the longest in the whole year.