It's just the beginning of summer, and the phrase 'hot and dry is going on, and the heat is unbearable'. It's very suitable to describe the dog days. Dog days are the hottest time of the year, so when does it enter this year? How many days will there be in 2019? These two days is exposed to 40 degrees Celsius high temperature weather, friends can be ready to sun protection against the heat.
Initial ambush time in 2019: July 12, 2019 - July 21, 2019, 10 days in total
Zhongfu time in 2019: from July 22, 2019 to August 10, 2019, 20 days in total
The last day of 2019 is from August 11, 2019 to August 20, 2019, with a total of 10 days
Sanfu is the hottest 30 or 40 days of a year in the Central Plains. It is calculated according to the lunar calendar, and it is between the middle and late July and the early August of the solar calendar. Each year, the time of the ambush is not fixed, and the length of the ambush is also different. It needs to be calculated by looking up the almanac. Simply use the four word formula 'three Geng' after the summer solstice to indicate the date of the ambush, that is, from the third 'Geng' day after the summer solstice, the first ambush is 10 days, the middle ambush is 10 days or 20 days, and the last ambush is 10 days.
In ancient China, it was popular to use 60 different names of 10 heavenly stems and 12 earthly branches to record the date, which was recycled. Every day with the word "Geng" is called "Geng day". The word "Geng" of Geng RI is the seventh of the ten Heavenly Stems of "a, B, C, D, e, Ji, Geng, Xin, Ren and GUI". Geng RI is repeated every 10 days.
From the summer solstice, according to the arrangement of Ganzhi dates, the third day is the beginning of the fall, the fourth day is the middle of the fall, and the first day after the beginning of autumn is the end of the fall. When there are four Geng days between the summer solstice and the beginning of autumn, the median is 10 days, and when there are five Geng days, it is 20 days. It seems that the appearance of the day of the seventh lunar month will affect the length of the Mid-Autumn period. Therefore, in some years, the dog days are 30 days, and in some years, the dog days are 40 days.