Is the summer heat the same day as the head drop surgery?
Entering a crouching state means entering the dog days. "On the summer solstice, the head of the three gengzi falls", which is the basis for establishing the first autumn. The first day of this year is July 13. "Three volts" refers to the first, middle and last three volts, which is about mid-July to mid-August. From summer to the third watch in the future, the first (10 day), the middle (10 or 20 days) and the last (after beginning of autumn 10 day) are the hottest days of the year.
Chufu is a statement about the calendar, which refers to the period from summer to the third Geng day in the future, that is, the first day of the dog days, and usually refers to the period from summer to the third Geng day in the future to the day before the fourth Geng day. According to China's calendar, this is the beginning of a real summer. The initial lodging is fixed at 10 day, and the initial lodging starts from summer to the third Geng day in the future (called lodging).
Extended data:
Dog days, one volt is ten days, counted by days. Therefore, the dog days are divided into three days, that is to say, after the third day of Gengtian, the summer solstice is the first day, the first volt. For example, the summer solstice in 2006 is June 2 1 in the western calendar year, and the dry day of this day is Xinri. 28 days later, it is the third Geng Day. Therefore, July 20, 2006 is the beginning of the first volt. Ten days later, it was another Geng day, that is, on July 30, it entered the second volt; Ten days later, it was another Geng day.
Moreover, it was the first Geng Day after beginning of autumn, that is, August 9, and entered the dog days; If it is 2007, July 15 is the third Geng day and the beginning of the first volt; Ten days later, it was another Geng day, that is, July 25, and it entered the second volt (middle volt); Ten days later, it's another watch day, but I haven't been to beginning of autumn yet. Ten days later (there are still 20 days in mid-autumn this year), it will be another Geng Day, the first Geng Day after beginning of autumn, that is, in August of 14, it will enter the dog days.
In other words, every year after the dog days, it is very hot, especially in the middle ten days (sometimes twenty days), which is the hottest. There is a folk saying that "the cold is in the March 9th and the summer heat is in the middle". A new algorithm in 265438+20th century —— Gengri formula: GR = (D-[Y/4]) MOD 10(GR Gengri, D even year 1 odd year 6, y year, [] rounding, MOD remainder) initial GR plus10.