1 How many days is it in dog days? The dog days are a period of time between summer heat and summer heat, and they are the highest and wettest days in a year, which are mainly divided into three days: the beginning, the middle and the end, and are calculated according to the ancient dry branch method in China. Of the 24 solar terms in the China lunar calendar, the third Geng Day after long summer is the beginning, the fourth Geng Day is the middle, and the first Geng Day after beginning of autumn is the end.

The first day and the last day are generally 10 days, but the annual duration of middling is different. You need to look up the almanac to calculate, and the length of the midriff is influenced by the time when Geng Day appears. Some years are 10 days, and some years are 20 days. For example, in 2020, there will be 20 days in the middle.

One volt, two volts, three volts, which volt is the hottest two volts.

One volt, two volts and three volts are the folk names of dog days, which actually represent the first, middle and last three volts. After entering the dog days every year, the weather will be hotter, but the second volt is the hottest, because this is the time when the sun is strongest and the ultraviolet rays are strongest.

Therefore, after entering Er Fu, we should pay more attention to heatstroke prevention in our life, and don't engage in extracurricular activities casually, especially for the elderly and children, who are in poor health and prone to heatstroke.

3 How to calculate the dog days refers to the "dog days" of the lunar calendar, that is, the hottest period of the year, which generally occurs between midsummer and heat. There are three Geng days, namely, the beginning, the middle and the end, which are calculated according to the ancient China method. Of the 24 solar terms in the China lunar calendar, the third Geng Day is the first, the fourth Geng Day is the middle, and the first Geng Day after beginning of autumn is the last.

After night, the surface humidity becomes higher, and more heat is absorbed every day, but less heat is emitted. The heat on the surface accumulates day by day, and reaches its peak at three volts, so the temperature is also the highest.

Four dog days in 2020. The dog days in 2020 will be divided into 40 days. Details are as follows:

Debut: Gregorian calendar/kloc-July 0/6 (May 26th of the lunar calendar)-July 25th, 2020 (the fifth day of the sixth lunar month).

Zhongfu: July 26th (June 6th)-August 202014th (June 25th).

Last day: August, 202015 (June 26th)-August 24th, 2020 (July 6th).