2021 dog days timetable
The time of the dog days in 2021 is from July 11 to the end of August 19, a total of 40 days.Among them, July 11 to 20 is the first time, July 21 to August 9 is the middle time, and August 10 to August 19 is the last time.
Introduction to the dog days
The dog days appear in the middle of the summer heat and the summer heat.They are the hottest, humid and muggy days of the year.The so-called "futianer" refers to the "dog days" of the lunar calendar, that is, the hottest period of the year.It can be understood this way:"Vu" means that the weather is too hot, and it is not appropriate to move.But the dog days are called "fu" because there are many cold factors.Sanfu is the hottest three or forty days in the year in the Central Plains.It is calculated according to the lunar calendar, and it is about mid-late July to mid-late August in the Gregorian calendar.In addition, the "fu" in "dog days" refers to "fuxie", that is, the summer evil in the so-called "six evils".
Climate characteristics of dog days
After entering the turf, the surface humidity becomes larger, the heat absorbed every day is more, the heat emitted is less, and the heat of the surface layer is accumulated, so it is hotter day by day , into the three volts, the accumulated heat on the ground reaches the highest peak, and the weather is the hottest.In addition, in summer, there is a lot of rain and the air humidity is high, and the heat capacity of water is much larger than that of dry air, which is also an important reason for the sultry weather.In July and August, the subtropical high is strengthened.Under the control of the subtropical high, the downdraft inside the high pressure makes the weather clear and less cloudy, which is conducive to sunlight exposure, and the ground radiation increases, making the weather even hotter.
The time of the dog days in 2021
The dog days in 2021 will start from July 11 and end on August 19, which will last for 40 days.
Chufu:July 11, 2021-July 20, 2021, a total of 10 days;
Zhongfu:July 21, 2021-August 9, 2021 day, a total of 20 days;
Mofu:August 10, 2021 - August 19, 2021, a total of 10 days.
The calculation method of dog days
The dog days are the hottest 30 to 40 days in the year in the Central Plains.Dog days are calculated according to the lunar calendar, which is about July in the solar calendar.mid-late to early-August.Every year, the time of entering fu is not fixed, and the length of the middle fu is also different.You need to check the almanac for calculation.Simply use the four-character formula "Xiazhi San Geng" to indicate the date of entering fu, that is, from the third "Geng" day after the summer solstice.From the beginning, the first volt is 10 days, the middle volt is 10 or 20 days, and the last volt is 10 days.
In ancient China, "the method of keeping track of the stems and branches" was popular in ancient my country, and 60 different names formed by matching 10 heavenly stems and 12 earthly branches were used to record the days and use them in a circular manner.Every day with the word "Geng" is called "Geng Day".The character "Geng" of Geng Day is the seventh character of the 10 Heavenly Stems of "A, B, C, Ding, Wu, Ji, Geng, Xin, Ren, Gui", and it is repeated every 10 days on Geng Day.
Starting from the summer solstice, according to the arrangement of the stems and branches, the 3rd Geng day is the first fu, the 4th geng day is the middle fu, and the 1st geng day after the beginning of the autumn is the last fu.When there are 4 geng days between the summer solstice and the beginning of autumn, it is 10 days, and when there are 5 geng days, it is 20 days.It seems that the morning and evening of Geng Day will affect the length of Zhongfu, so there are 30 days of Futian in some years and 40 days of Futian in some years.
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