Dog days mean

The dog days mean:

It occurs between the light summer heat and the summer heat, and it is the time when the temperature is the highest, humid and sultry in a year. Three volts can be divided into initial, intermediate and final volts, and its date is determined by the coordination of the 24 solar terms and the dates of the trunk and branch dates. After "entering the volt", many places in the country will enter the continuous high temperature mode.

Introduction of dog days:

Dog days, which appear between the summer heat and the summer heat, are the periods with the highest temperature, humidity and sultry heat in a year. Three volts can be divided into initial, intermediate and final volts, and its date is determined by the coordination of the 24 solar terms and the dates of the trunk and branch dates. After "entering the volt", many places in the country will enter the continuous high temperature mode.

The traditional almanac stipulates that "it will count at the third Geng day of the summer solstice", which means that "counting backwards from the summer solstice day" and starting to crouch at the third Geng day. The "Geng Day" here refers to the day with the prefix "Geng" in the ancient "Ganzhi Jiri Law". "Fu" means that Yin qi is forced to hide underground by Yang qi; It also means that the weather is too hot to move.

the length of the dog days mainly lies in the difference of the middling days. Because the third Geng day (first fall) after the summer solstice solar terms occurs at different times every year, the number of days leading to the middle fall is also different. The mid-crouching time is long or short, which may be 1 days or 2 days. So there are two situations: in some years, the dog days are 3 days, and in some years, it is 4 days.

The dog days appear between the summer heat and the summer heat (from mid-July to mid-August in Gregorian calendar), and the dog days are divided into initial, middle and last days. The dog days are characterized by high temperature, low air pressure, high humidity and low wind speed. "Fu" means that Yin qi is forced to hide underground by Yang qi; It also means that the weather is too hot to move.

the date of the dog days is determined by the coordination of the 24 solar terms and the date of the trunk and branch. Because every Geng day is 1 days apart, the stipulated time for the first and last days is 1 days. And because the third Geng day (first fall) after the summer solstice solar terms appears sooner or later, the number of days in the fall is long and short.

The dog days are the hottest, humid and sultry time of the year. The reason why the air humidity is high in dog days is that the southeast wind blows in dog days, while the southeast is the ocean, and the air is humid. The humidity of sea breeze causes the high humidity in dog days. In dog days, "high temperature and high humidity" are the climatic characteristics of most areas in the north and south of China.

"three days" and "three summers" (light summer, heavy summer and summer in the 24 solar terms) both represent extreme high temperature weather, and the curves on the time axis and temperature axis are basically the same: summer comes, summer comes; When the sky goes down, the summer will be over.

The reason why the ancients called the extremely hot day in a year "summer heat" and found a "fu" to accompany it is because of health care besides the cultural meaning.