When is Fu Tou?

Specifically, there are three days in 2022, the first day is from July 16 to July 25, the middle day is from July 26 to August 14, and the last day is from August 15 to August 24.

In the solar terms of the lunar calendar, in addition to the twenty-four solar terms, there are also some miscellaneous solar terms, such as three volts, ninety-nine, entering the plum blossom and leaving the plum blossom. The so-called three volts is the floorboard of the initial, middle and final volts. The date of the dog days is determined according to the date of the solar term and the date of the dry branch.

According to the provisions of the lunar calendar, the period from summer to the third Geng Day in the future (the day with "Geng" in the trunk and branch calendar is called Geng Day, such as Geng Zi and Geng Shen) is the initial stage (also called Fu Tou); The fourth Geng day is mid-volt (also called second volt); The first Geng Day after beginning of autumn is the last day (also called dog days).

According to the provisions of the lunar calendar, the interval between two adjacent Geng days is ten days, so the time from early autumn to Mid-Autumn Festival is fixed at ten days. However, due to the stipulation that the first Geng Day after beginning of autumn is the last autumn, the time from mid-autumn to the last autumn is ten days and twenty days. The last ambush was fixed for ten days as the first ambush.

The dog days are just between the light summer heat and the heavy summer heat, which is the hottest time of the year. That's what the agricultural proverb says, "Little summer is not hot, big summer is in dog days".