What does the word "dog days" mean?

The dog days appear between the light summer heat and the heavy summer heat, and are the days with the highest temperature, humidity and sultry weather in a year. V means latent. The "crouching" of "dog days" means "crouching evil". That is, the so-called "six evils" (referring to "wind, cold, heat, dampness, dryness and fire"). The so-called "dog days" refers to the "dog days" of the lunar calendar, which is the hottest period of the year. The dog days are full of firepower, and the high temperature weather in most parts of the south has been "sitting in the village" for many days. Since ancient times, Changsha people have had the habit of eating ginger stew chicken on the roadside in dog days. Changsha, known as the "stove", is surrounded by mountains on three sides and water in the north, with a humid climate. The ancients believed that roosters have the function of eliminating dampness, and formed the habit of eating chickens with their heads down, thus leaving a folk proverb "Eat a chicken with their heads down and be healthy for a year".