When did the Nine Dog Days begin?

When does Sanjiutian (counting nine days) start? \r\n\r\n　When do the dog days of summer begin? How many days per volt? .\r\n\r\n When did Sanjiutian (counting nine days) start? When do the dog days of summer begin? How many days per volt? .\r\n As we all know, the three to nine days are the coldest period that people feel. Thirty-nine days are easier to calculate. On the day of the Winter Solstice every year, the "counting of nine" begins. After that, as long as you are familiar with the traditional Chinese solar terms, you will know the timetable for cold and heat. This is: "1929, I put my hand in my arms; 3949, the pigs and dogs froze to death; 5969, I watched the willows along the river; 7963, the pedestrians took off their clothes; 9981, The old man who plows the fields is neutral.” This means that since the earth has accumulated hot and cold energy from the previous time, there will be 40 days of the coldest weather after the winter solstice; 18 days after the winter solstice, stiff hands and feet; 18 to 36 days after the winter solstice These 18 days are the coldest period of the year, and pigs and dogs can freeze to death; but once we enter these 18 days from 36 to 54 days after the winter solstice, the willow trees along the river will sprout new shoots, and the climate will become warmer and 54 to 70 days after the winter solstice, people will take off their winter clothes; 70 days after the winter solstice, they will prepare for spring plowing, and the weather will be completely warm. \r\n　And how to calculate the dog days of summer? The calculation of the Dog Days is a little more complicated, but it is still easy to calculate as long as you master the rules of the traditional Chinese calendar. Because in the traditional Chinese calendar, the 365 days in a year are divided according to the heavenly stems "A, B, B, Ding, Wu, Ji, Geng, Xin, Ren, Gui" and the earthly branches "Zi, Chou, Yin, Mao, Chen". The combination of ", Ji, Wu, Wei, Shen, You, Xu, Hai" is determined. Therefore, the combination of heavenly stems and earthly branches is a cycle every sixty days. In this way, in the traditional Chinese calendar, every day has a celestial stem and earthly branch day, such as Jiazi, Dingji, etc. \r\n The dog days of three days and the ten days of one dog day are calculated according to the ten numbers of the heavenly stems. Therefore, the division of the dog days is as follows: the Geng day of the third celestial stem after the summer solstice is the beginning of the first dog day. For example, the summer solstice in 2006 was June 21 of the Western calendar year. The Heavenly Stem Day on this day was Xin Day. 28 days later, it was the third Geng Day. Therefore, July 20, 2006, was the third ring? On August 29th, it entered the second volt; ten days later, it was another Geng day, that is, August 9th, and it entered the third volt. Dog days. This means that every year after entering the Dog Days, it is very hot, especially the ten days of the Third Day, which are the hottest. \r\nBased on the heat accumulation of the earth, Chinese folk have concluded the saying of the twenty-four autumn tigers. This means that the twenty-four days after the beginning of autumn every year are also very hot. However, Chinese folk also summed up the proverb that "the morning and evening of the Beginning of Autumn are cool; mosquitoes die from the Beginning of Autumn". This means that although the weather is still very hot after the Beginning of Autumn, it becomes cooler in the morning and at night, and there are fewer and fewer annoying mosquitoes from the Beginning of Autumn. \r\nWhat needs to be explained here is that because the Heavenly Stem and the Earth govern the sixty-year cycle of combined days, sometimes the Geng Day may not appear immediately after the end of the first lunar month. Therefore, sometimes, the middle The period of incubation may last more than ten days. \r\n "Three Volts" is the hottest day of the year. "Fu" means that Yin Qi is forced by Yang Qi to hide underground. "Sanfu" is the collective name for the first, middle and last days, which appear every year from mid-July to mid-August in the Gregorian calendar. According to the climate rules of my country's lunar calendar (lunar calendar), predecessors have long stipulated: "The third Geng day after the summer solstice is the first volt (first volt), the fourth Geng day is the middle volt (second volt), and the first Geng day after the beginning of autumn is the first volt. The day is the last day (three days), and each day lasts for ten days and lasts for thirty days. "In some years, the "middle days" last forty days. \r\nAccording to the "Tongshu", "Yin Yang Almanac" and "Wannian Calendar", it can be seen that this year is 2005 AD in the solar calendar, the year of Yiyou (rooster) in the lunar calendar. "Three Volts" are: July 15th, the tenth day of the lunar calendar is the first fu (also called the first fu); July 25th, the twentieth day of the lunar calendar is the middle fu (the second fu); August 14th, the seventh day of the lunar calendar The Gengwu day on the tenth day of the first lunar month is the last day (three days). \r\nIn general years, each volt has ten days, and three volts last for thirty days. But this year's "year" is the "Zhongfu" (two volts) twenty days. Therefore, the "three volts" period lasts forty days. That is, from the beginning of the tenth day of the lunar month to the last day of the last day.

"Dog Days" are determined according to the ancient Chinese "Stem and Branch Day Method". Every year after the summer solstice, the third Geng day (referring to the day with the word "G" in the calendar of stems and branches) is the first day, the fourth day after the beginning of autumn is the middle day, and the first day after the beginning of autumn is the last day. Together they are called It is three volts. As the saying goes, “It’s hot in the dog days of summer.” According to our country’s traditional calendar, today begins the relatively hottest “dog days of summer” in summer. The three volts refer to the three consecutive periods of the first volt, the middle volt and the last volt. The third Geng day after the summer solstice is the beginning of the Chufu (today is the beginning of the Chufu this year), the fourth Geng day is the beginning of the Middle Fu, and the first Geng day after the Beginning of Autumn is the beginning of the last Fu. 10 days, but in some years it lasts 20 days, such as this year. Generally speaking, among the "dog days", the average temperature in the "mid-dog days" is the highest. Of course, this calculation method of the ancients is not very scientific and is not necessarily closely integrated with the actual meteorological conditions of that year. The extreme highest temperatures throughout the year in various places do not necessarily appear in the "mid-volt" or even the "three-volt period". But no matter what, the "dog days" are indeed the period of intense heat in midsummer. Everyone should pay attention to heatstroke prevention and cooling. "Thirty-nine days" refers to the third "nine days" after the winter solstice, that is, the nineteenth day after the winter solstice. Day twenty-seven. Our country's lunar calendar has the term "nine-nine", which is used to calculate seasons. The calculation method is to start from the winter solstice in winter (the beginning of the winter solstice is called "Jiaojiu", which means the beginning of cold). Every nine days is a "jiu", the first nine days is called "yijiu", and the second nine days is called "yijiu". It is called "Two Nine", and so on, until "Nine Nine", that is, until the ninth nine days, until nine nine and eighty-one days have been counted. At this time, winter is over and spring has arrived. Generally, it is the coldest during "March 9". "The third ninth day after the winter solstice" refers to "three nines", which is also the day when "three nines" and "four nines" intersect, not "three nines". \r\n It is a custom in old Beijing to draw a "Nine-Nine Picture to Eliminate the Cold" on the winter solstice. This custom has been recorded in the works of the Ming Dynasty. This picture is a picture of plum blossoms, with a branch of plum blossoms drawn. There are 81 flower patterns on it (representing ninety-nine and eighty-one days). Every day I dye a pattern with a pen. After these 81 days, all 81 flower arrangements have been dyed. Spring has arrived, so it is called "Nine-Nine Cold Relief Picture". Moreover, in Beijing during the Ming Dynasty, there were also engraved "Nine-Nine Cold-repelling Pictures" for sale in the market, which was even more trouble-free, and there was also "Nine-Nine Songs" next to this picture. This "Jiujiu Song" is based on people's feeling of cold and phenological phenomena (that is, changes in animals and plants caused by changes in weather and temperature, such as willow trees sprouting, peach trees blooming, wild geese flying, etc., all related to the temperature at that time related, and these are not necessarily related to the month and day) to reflect the warmth and coldness of the weather. The "Nine-Nine Song" popular in Beijing when the author was a child goes like this: "In 1929, don't take action; in 3949, walk on the ice; in 5969, look at the willows along the river; in 79th, the river opens, in 89th The geese come; nine-nine plus one-nine, the cattle are everywhere." It has a popular rhyme, which is catchy to read and easy to remember. This is the saying of "nine-nine". It existed as early as the Northern and Southern Dynasties. At that time, people counted from the winter solstice to ninety-nine and eighty-one days, and the cold days were over. And this (Jiujiu Song) probably originated in the Song Dynasty. It was already very popular in the Ming Dynasty. When "Nine Nine Songs" became popular among the people, there were different versions with different contents and details. Let’s take a look at the Ming Dynasty