The three dog days are the hottest period in summer. Yesterday was the summer solstice. Then we will enter the long and hot three dog days. Which day will the three dog days start in 2018? How many days are there in this year's dog days? Let's have a look.
What's the matter with Fu Tianchang for 40 days
Since July 17, 2018, the three volts will not end until August 26, with a period of up to 40 days. However, each year, the three volts is the hottest time of the year, so we should pay special attention to heatstroke prevention.
At 18:7 on the 21st, the solar term "summer solstice" came into being. "Summer solstice three Geng several head volt", astronomy experts reported that this year's date of ambush is July 17, "three dog days" up to 40 days. The summer solstice is not only the longest day and shortest night in the northern hemisphere, but also determines the length of the "three dog days" in that year. It is understood that the specific date of "three volts" is determined by the date of the solar term and the date of the ganzhiji date. Geng, ranked seventh in the heavenly stems, belongs to gold in the collocation with the five elements. Gold is afraid of fire and decreases day by day in the weather of several volts. Therefore, the ancients counted "volts" in terms of Geng days.
As for this year's "three dog days", on July 17, the "first ambush", on July 27, the "middle ambush", on August 16, the "last ambush" and on August 26, the "ambush". The climate of "three rainy days" is characterized by high temperature, low air pressure, high humidity and small wind speed, which is the hottest season of the year. Health experts warned that at this time of the festival, the public should pay special attention to heatstroke prevention, light diet, timely water supply, potassium supplement, eat bitter food more, sleep regularly, and reduce unnecessary going out during high temperature period as much as possible.
Why there are 40 rainy days in 2018
The dog days are the days between summer heat and autumn. After entering the dog days, it is the hottest and most uncomfortable time of the year. This year's first three dog days start on July 17, 2018, and last until July 26, which will become more and more hot.
The specific date of the three volts is determined by the date of the solar term and the date of the ganzhiji. According to the traditional calculation method of our country, the third and fourth day after the summer solstice is the start date of the first and second ambush respectively, and the first day after the beginning of autumn is the first day of the third ambush. Geng day is a day with the word "Geng" in the ganzhiji day, such as Geng Zi, Geng Chou & hellip; hellip; every year in the book of the year of the countryside.
Because the third and fourth day are the first day of the first and the middle ambush, and the interval between each day is 10 days, so the time of the first ambush is 10 days, and the last ambush is also 10 days. The duration of the MV may be 10 days or 20 days. The third day of Geng (first fall) after the summer solstice every year is different sooner or later, so the number of days in the middle fall is also different, so there is a difference between 30 days in some years and 40 days in some years.
Three dog days appear in the summer heat and heat, is the highest temperature and humid, sultry day of the year. The so-called dog days refer to the three dog days of the lunar calendar, which is the hottest period of the year. It can be understood that the weather is too hot to move. But the reason why it is called "Fu" is that there are many cold factors. Sanfu is the hottest 30 or 40 days of the year in Central China. Sanfu is calculated according to the lunar calendar, which is between the late July and the early August of the lunar calendar.
How to prevent heatstroke in dog days
1. Don't drink when you are thirsty
After a large amount of labor and sports sweating, it is not suitable to drink a large amount of white water, and some light salt (sugar) water should be added appropriately, because after a large amount of sweating, the salt in the human body is lost too much, if the salt is not added in time, the proportion of water and salt in the body will be seriously imbalanced, leading to metabolic disorder.
2. Do not drink too much
In summer, the human body is easily affected by the temperature to accumulate damp heat, and excessive damp heat is the cause of skin ulcers, carbuncle, swelling and toxin. If you drink a lot of white wine, it will help heat and damp, just like adding fuel to the fire.
3. Standing heatstroke medicine
Hot summer, hot and dry, often make people eat tasteless, sleep not fragrant, prone to dizziness, headache, fatigue, even nausea, vomiting and other symptoms, in order to spend the summer safely, the family should prepare some heatstroke drugs, common drugs and food are: Ten drops of water, Huoxiang Zhengqi water, cool oil, honeysuckle, chrysanthemum, lotus leaf, watermelon.
4. Learn to take a good nap
In summer, the days are long and the nights are short, the weather is sultry, the sleep time is short, and the sleep quality is poor. If you can take a nap in the afternoon, it's like recharging your brain, which is conducive to physical recovery.
5. Humidity movement
Life lies in exercise, but people who are old, weak and lack exercise at ordinary times should never exercise violently, otherwise it will be harmful and useless. According to the world consensus, the best sport is walking.
6. Hot tea is better than cold tea
Medical research shows that: heatstroke prevention and cooling, hot tea is better than cold drink, and the maintenance time is longer. Tea is rich in potassium. The increase of sweating in summer often causes excessive loss of potassium ions. Potassium and sodium jointly maintain the normal osmotic pressure and acid-base balance inside and outside the cells, which has an important influence on the function of nerves and muscles, especially the normal movement of the heart muscle. When the potassium in the body is insufficient, the body often feels tired and weak, appetite drops, heat resistance drops, and even heatstroke. In summer, drinking tea often can supplement potassium element of human body, improve heat resistance and effectively prevent heatstroke.