Popular science of solar terms knowledge: does the summer solstice start to count volts?

as the saying goes, it's cold in 39 days, and hot in 3 volts. The freezing weather in the past three or nine days may not be so profound for friends in southern China; But in the dog days, the heat is unbearable, and they have a lot to say. Then let's understand, does the summer days begin with the summer solstice solar terms? Q: Does the summer solstice start counting volts? A: No, the day when counting volts begins is the third Geng Day after the summer solstice.

"Fu" means that yin is forced by yang to hide underground, with three volts every year, and the dog days are the hottest time of the year. From the summer solstice, according to the arrangement of the dry and branch days, the third Geng day is the first time. The fourth Geng Day is the mid-ambush, and the first Geng Day in beginning of autumn is the first day of the last ambush, which lasts for ten days.

during the Qin and Han dynasties in China, there was a popular saying that the hottest summer days belonged to fire, while Geng belonged to gold, and gold was afraid of being melted by fire, so on Geng day, gold would be hidden. Therefore, it is stipulated that from the third Geng day after the summer solstice, it is the first lodging (with 1 days), from the fourth Geng day after the summer solstice, it is the middle lodging (with 1 days in some years and 2 days in some years), and from the first Geng day after beginning of autumn, it is the last lodging, also known as the final lodging (with 1 days), which is always called three volts.

When there are four Geng days between the summer solstice and beginning of autumn, the middling period is 1 days, and when there are five Geng days, it is 2 days, so the middling period to the terminal period is sometimes 1 days, and the "initial period" and "terminal period" are both 1 days.

the word "Geng" on Gengri is the seventh word in the ten-day trunk of "A, B, C, D, E, Ji, Geng, Xin, Ren and Gui", and Gengri is repeated every ten days. The start and end time of the dog days varies from year to year, roughly from mid-July to mid-August, but what is certain is that the third Geng day counted from the summer solstice is the lodging, and the dog days are also counted from the third Geng day after the summer solstice.

The arrival of the dog days means the hottest climate stage of the year. It is suggested that netizens should not only pay attention to heatstroke prevention and cooling, but also be careful that the items at home are mildewed and need to be dried.

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