Dog days timetable for 2020-When will the ambush start?

Do you think it's getting hotter and hotter now? In fact, don't worry for the time being, because it hasn't entered the dog days yet, and it's not the hottest time. While it's still cold, go wherever you want, and it will start to get hot in July.

Entry time in 2020 Entry time in 2020: Thursday, July 2020 16 (May 26th, Year of the Rat).

In 2020, the dog days will be divided into initial, middle and final days, totaling 40 days, as follows:

Debut: Gregorian calendar 16 July (May 26th of the lunar calendar) to July 25th of 2020 (June 5th of the lunar calendar).

Zhongfu: July 26th, Gregorian calendar (June 6th, lunar calendar) ~ August 202014th (June 25th, lunar calendar).

Last few days: Gregorian calendar 15 from August 26th to August 24th, 2020 (July 6th).

2020 Entry Time: July 2020 16, lasting until August 24, 2020.

The dog days are the hottest thirty or forty days in a year in the Central Plains. The dog days are calculated according to the lunar calendar, between the middle and late July and the early August of the solar calendar. The length of accommodation is not fixed every year, and the length of accommodation is also different. In short, from summer to the third "shift" day in the future, the first lodging is 10 day, the middle lodging is 10 day or 20 days, and the last lodging is 10 day.

The date of the dog days is from the summer solstice to the third Geng Day, which is the first lie, the fourth Geng Day to the fifth Geng Day is the middle lie, and the second Geng Day after the first Geng Day to beginning of autumn is the last lie. (Every Geng day is separated by 10 days) The number of summer days is not fixed. There are four Geng days from summer to beginning of autumn, with 65,438+00 days in midsummer, five Geng days and 20 days in midsummer.

In classical Chinese, V means latent. The "crouching" of "dog days" refers to "crouching evil", that is, the so-called "six evils" (referring to "wind, cold, heat, dampness, dryness and fire"). In summer, summer evil will gradually lurk in the depths of the body without being noticed. If summer evil is not removed, fire in autumn will kill gold and hurt lung qi, which will lead to the decline of people's immunity and diseases such as cold, cough and fever. After entering winter, these diseases will recur. Autumn is sarcoidosis, there are few harvesters, and winter solstice is very sick. "

Therefore, it is clearly pointed out in Huangdi Neijing that if you love outside, you will be angry. Don't hide in an air-conditioned room for fear of sweating. Cold drinks can't dispel summer heat, but will hurt the spleen and stomach. You know, tea is the best drink to relieve summer heat. Although a cup of hot tea will sweat a little, it will be followed by a chill. You can't just look at the present, but look further.

Why does the humidity of the surface become higher after the heat enters the dog days, and the heat absorbed every day is more, but the heat emitted is less, and the heat on the ground accumulates, so it gets hotter every day and enters the dog days, and the accumulated heat on the ground reaches its peak, and the weather is the hottest. In addition, there is much rain in summer, the air humidity is high, and the heat capacity of water is much greater than that of dry air, which is also an important reason for the sultry weather. The subtropical high intensified in July and August. Under the control of the subtropical high, the descending airflow inside the high makes the weather clear and cloudy, which is beneficial to the sunshine, the ground radiation heats up and the weather is hotter.

Isn't it hot after going out? Generally speaking, going out is going out in dog days, and the summer heat gradually disappears; The summer solar term represents the end of the hot summer, and the weather should be getting cooler and cooler. But in some areas in the south, people who just feel a little cold in autumn often feel hot weather in late summer, which is the legendary autumn tiger.

The reason for the formation of autumn tiger is that the western Pacific subtropical high that controls China gradually moves southward in autumn, but moves northward. Under the control of this high pressure, it turned cloudy and sunny locally, with strong solar radiation and rising temperature. Due to the vast territory of China, the performance of "Autumn Tiger" is slightly different. For example, the autumn tigers in South China are later than those in the Yangtze River valley, generally delayed by 2-4 solar terms.

In addition, the prevention and control time of autumn tigers is long and short every year, ranging from half a month to two months; Sometimes the autumn tiger comes and goes, and then goes back. Gu Tieqing, the author of Jia Qinglu, said: "After the local customs have passed the heat, the weather is still gloomy, and it takes about 18 days to cool down; As the saying goes, eighteen pots of summer heat means eighteen days of bathing. "This means about eighteen days of sweating. However, although the weather in Autumn Tiger is relatively high, the air is dry and sunny as a whole, and it is not very hot in the morning and evening, so it will not be too hot to breathe.