What do you mean by the last lie you told?

Beginning of autumn is the first Geng Day after beginning of autumn and the last autumn in dog days, commonly known as autumn tiger.

According to the Chinese calendar, the last time refers to the day before the first Geng Day after beginning of autumn and the second Geng Day, and the specific time is about ten days. The date of "Fu" is calculated according to the main branch date. In ancient China, heavenly stems and earthly branches was often used in some places for sixty years. Generally speaking, at the end of the day, it is still very hot and sunny at noon. People find it unbearable and will call this period "autumn tiger".

The other two volts in the dog days are the initial and intermediate volts, which are about ten days in a year, while the intermediate volts are different in different years, with a period of about ten to twenty days. The temperature in dog days is the highest in a year, which is both humid and sultry.

Introduction to dog days

The dog days, which appear between the light summer heat and the hot summer heat, are the time when the temperature is the highest and it is humid and sultry in a year. Three volts can be divided into initial, middle and final volts, and its date is determined by the coordination of 24 solar terms and the dates of dry and branch. After "entering the volt", many places in the country will enter the continuous high temperature mode.

The traditional almanac stipulates that "counting from the third Geng day in summer", that is to say, "counting down from the summer day until the third Geng day" is about to begin to dormant. The "Geng Day" here refers to the days prefixed with "Geng" in the ancient "Ganzhi Jiri Law". "crouching" means being forced to hide underground; This also means that it is too hot to move.

"Three volts" and "three summers" (summer, summer and midsummer in the 24 solar terms) both represent high temperature and extreme weather, and the curves on the time axis and the temperature axis are basically the same: summer comes, summer comes; When the sky falls, summer is over. The reason why the ancients called the extremely hot day of the year "summer heat" and found a "fu" to accompany it, in addition to the cultural meaning, another important purpose is for health care.

The above contents refer to Baidu Encyclopedia-Dog Days.