How is the three-volt time defined?

The calculation of dog days every year is closely related to beginning of autumn. The dog days are called "miscellaneous solar terms" by the ancients, which is a term invented by the ancients to count the hottest period of the year. It has a hidden meaning, so it tells people that in the hottest period, people should hide themselves, and beginning of autumn will see the end of the pain. It is the hottest period in a year, which is extracted from 24 solar terms and connected. This means that from summer to the third Geng day in the future, it will enter the prophase, which is 10 days. However, on the first Geng day after beginning of autumn, it entered the terminal stage, which lasted 10 days. On August 7th, the first officially ushered in the beginning of the autumn solar term. In many people's subconscious,

As the saying goes, "cold is in the March 9 th, and heat is in the middle." Although August 7th was beginning of autumn, it was still in the middle, not to mention the last fall. It's a real sauna day-steaming above and cooking below, and it's called "autumn tiger".

The fourth Geng day is two volts, and the fifth Geng day is three volts. There are 40 days in the dog days this year, including: July 16~25 is the first day of junior high school, * * 10; July 26th to August 14, which is in the middle range, ***20 days; August 15 ~24 is the last day, *** 10. In ten days, it is only possible to see Geng in late summer, and it will take six days to see Geng. See Geng six days ago, and stay for twenty days in the middle, which means that the period of stay in the middle is longer, which means that the heat is longer. There are many proverbs about Fu. Such as: there is rain on the head, there is rain on the head; Sunbathing head, shower tail, shower head, sunbathing tail

The dog days appear every year, mostly between the light summer and the midsummer. According to the data, the dog days this year began on July 16, 2020. By the end of August 24th, * * * period is 40 days. The specific weather period in the dog days is as follows: After beginning of autumn, the weather may gradually turn cold, but this idea is wrong, because beginning of autumn is only the critical point of solar terms at most. Generally speaking, the solar terms in beginning of autumn are in the middle of the solar terms, which is the hottest time of the year.