There is a saying among the people that "cold is in September and hot is in the middle". Sanfu days generally appear between Xiaoshu and Dashu. It is the day with the highest temperature and sultry heat in the year. Every year's three dog days are different. When is the specific time of this year's three dog days?
'Fu' can be called 'long summer', 'Fu' is an alternative arrangement of seasons by the five experts, among which 'Fu' is' earth '. "Fu" means that Yin Qi is forced to hide underground by Yang Qi. In spring, summer, autumn and winter, the five experts crown it with wood, fire, gold and water. In a year, the five seasons are spring, summer, long summer, autumn and winter. From autumn to winter, gold generates water, water generates wood, wood generates fire, and it circulates naturally. But from summer to autumn, it's not like that. Fire conquers gold. Gold dare not come out. It's going to be dormant for a while, and "dormant" is the original meaning of "V".
Autumn belongs to 'Gengxin gold', so 'ambush' should start from 'Geng day'. The temperature is the highest, and the incubation time needs to be 20 days after the summer solstice, so it starts from the third 'Geng day' after the summer solstice and ends on the second Geng day after the beginning of autumn. If there is a day of Geng in autumn and the next two days, the three volts will last for 30 days in total, otherwise the three volts will last for 40 days in total.
Among them, the hottest of the three volts is the middle volt.
The start and end time of the three dog days in 2018 are: July 17, 2018 and August 25, 2018, that is to say, the three dog days in 2018 are up to 40 days. The specific initial, intermediate and final voltage times are as follows:
10 days in the beginning of 2018: July 17, 2018 to July 26, 2018;
20 days of medium voltage in 2018: July 27, 2018 to August 15, 2018;
Last 10 days in 2018: August 16-25, 2018;