When is the start and end time of 20 17 dog days?
In 20 17, it entered the ambush from July 12 (the third year of the summer solstice), and began to lie in the middle on July 22, ending on August 10, staying in the middle for 20 days, 40 days in dog days, and 2 1 sunrise on August.
Dog days are generally 30 days, and some years are 40 days, mainly depending on the number of dog days.
20 17 initial time: 20 17 July 12, Chen Geng.
20 17 midnight time: 20 17 July 22nd, Geng Xu.
20 17 Terminal time: 20 17 August in Gengwu 1 1.
After lodging, the surface humidity increases, and the heat absorbed every day is more, but the heat emitted is less, and the heat on the surface is accumulated. So it gets hotter every day, and when it enters the dog days, 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.
Dog days date calculation method
2 1 century centroid algorithm-Geng day formula: GR = (d-[y/4]) MOD 10 (GR Geng day, d even year 1 odd year 6, y year, [] rounding, MOD rounding)
For example, in 2006, when GR at the initial voltage increased by 10, GR = (1-[6/4]) mod 65438 was increased, when GR at the final voltage was greater than 7, it decreased by 1, and when GR was less than 8, it decreased by 9 (/in 2006
Related reading: Precautions in dog days.
1, hydrating health
The theory of traditional Chinese medicine pays attention to "Yin-Yang and Five Elements" and "Harmony between Man and Nature". Winter is Yin, summer is Yang, and summer is the season when Yang is in full bloom, which means that the yang tends to rise and flourish in summer, and the cold in the body is in a state of easy solution. In dog days, people will sweat a lot when they are working or exercising a little, and then they will have a strong thirst. Therefore, hydrating health has become the top priority in dog days.
2. The more sour, the sweeter
Ancient scholars believed that "summer heat and dampness should be cleared and replenished". In hot summer, people like cold drinks and drink plenty of water, so that moisture invades the human body, while external moisture enters the body, making water wet and invigorating the spleen, lifting the spleen and stomach, causing digestive dysfunction, stagnant water and loss of appetite.
According to the viewpoint of TCM health preservation, dryness and dampness in summer do great harm to the spleen, while bitter food has the effect of purging dryness and should not be eaten more, so it is advisable to eat more sweet and cold or sweet and cold in daily diet. And in summer, you return to your heart, but your heart likes cold and wants to eat sour, so you should eat more sour in summer. Such as pineapple and watermelon.
3, the true qi to fire
The hot summer days not only bring us physical discomfort, but also easily lead to more and more people's anger rising, which is manifested as emotional irritability, anxiety, excitability, insomnia and so on. These symptoms are called "summer mood disorder" in medicine.
Therefore, "removing fire" is also a compulsory course for summer food supplement. The best choice for summer food is bitter gourd, tomatoes and other cool fruits and vegetables. At the same time, milk is slightly cold, which can replenish water, nourish yin and reduce fever, and is also a good product for "dispelling fire". Duck is a good tonic in summer.