When does the volt count start?

The specific time of dog days in 2022:

The dog days in 2022 start from July 16 and end on August 24th, lasting for 40 days.

The time of entering the hole is not fixed every year, and the length of the hole in the middle is different. It needs to be calculated by looking up the almanac. The formula of "the third night in summer" can be simply used to indicate the date of entering the cave, that is, from the third Geng day in Xia Hou, the first period is 10 day, the middle menstrual period is 10 day or 20 days, and the last period is 10 day. In ancient China, the method of "recording stems and branches" prevailed, and 10 days were made into 60 groups of stems with different names and 12 ground branches to record the days and recycle them.

Every day with the word "Geng" is called "Geng Day". The word "Geng" in Geng Ri is the seventh word in the ten days of "A, B, C, D, E, Ji, G, Xin, Ren and Gui", which is repeated every 10 day.

From summer to Sunday, according to the arrangement of stems and branches, the third Geng day is the sun, the fourth Geng day is China and Japan, and the first Geng day after beginning of autumn is the end of the year. The fourth Geng day from summer solstice to autumn is 10, and the fifth Geng day is the 20th. It seems that Geng Day will affect the length of China government sooner or later, so some years have 30 days of Fukuda, and some years have 40 days of Fukuda.