Initial lodging: July 16-July 25th.

Midrange: July 26th-August14th.

Terminal: August 15-August 24th.

The dog days, which appear between the summer heat and the summer heat, are the days with the highest temperature, humidity and sultry weather in a year. The "crouching" of "dog days" refers to "crouching evil", that is, the so-called "six evils" in summer evil.

"dog days" refers to the "dog days" in the lunar calendar, which is the hottest period of the year. It can be understood that "crouching" means that the weather is too hot to move. But the dog days are called "volts" because there are also many cold factors. The dog days are the hottest 30 or 40 days in a year in the Central Plains, and they are calculated according to the lunar calendar, which is from the middle and late July to the middle and late August in the solar calendar.