This is calculated according to the number of days. Therefore, the dog days are divided into three days, that is to say, the third day from summer to the future is the beginning of the first dog day.
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 early July and mid-August in the solar calendar. Moreover, the time of accommodation is not fixed every year, and the length of accommodation is also different. You need to consult the almanac to calculate, that is, from summer to the third Geng day in the future, the initial lodging is 10 day, the intermediate lodging is 10 day or 20 days, and the final lodging is 10 day.
Dog days taboo:
Avoid eating peppers. The temperature is high and dry in dog days. Eating Chili at this time is easy to get angry, which will lead to symptoms such as dry and itchy nasopharynx and nosebleeds, and may also cause constipation, dry stool and bloody stool. Therefore, it is best not to eat Chili directly in dog days, but also to eat it in moderation as a seasoning.
Avoid cold drinks, ice cream and so on. It's cool to eat frozen cold drinks in dog days! However, if you eat like this, your health will go wrong. On a hot day, eating cold drinks and ice cream will lead to moisture and pore blockage, which is not conducive to perspiration. And it is likely to lead to gastroenteritis and indigestion. These problems are likely to occur in the case of environmental changes in winter.
Avoid prolonged outdoor exposure. In dog days, especially when the sun is shining, long-term exposure can easily lead to dizziness and heatstroke. Therefore, in dog days, it is safer to avoid long exposure and exercise indoors.
Baidu Encyclopedia-Dog Days