In daily life, there are 24 solar terms in a year. The solar term of great summer is a very special solar term, which is the hottest one in a year. There are two or three days of great heat. What's the difference between great heat and three dog days? Let's get to know.
What is three volt
Three volts mainly refers to three dog days, and three dog days mainly refers to the first, middle and last. The dog days are the hottest time of the year. The annual occurrence time of the three dog days is slightly different, but it is generally concentrated in July to August. The main climatic features of the three volt days are very high temperature, high humidity, small wind and low air pressure. And the so-called "Fu" is that it's very hot. You'd better have a good rest and reduce your activities.
What is great heat
Great summer heat is one of the 24 solar terms in China. It is great summer heat after small summer heat. The beginning of summer heat is July 22-23 of the Gregorian calendar. The arrival of the great summer indicates that the weather is very hot. In many parts of our country, there will be high temperature weather, and orange warning will be issued. The climate of great summer is characterized by high temperature and hot weather accompanied by thunderstorm, which is also very humid and sultry.
The difference between summer heat and three dog days
Different time
Through the introduction of Sanfu and Dashu, we know that Sanfu is mainly a long period of time. Usually, it takes about 40 days to experience the first, middle and last ambush. The time of summer heat is relatively short, usually more than ten days, usually in the time before and after the midriff.
Different origins
The origin of Sanfu: Sanfu days are determined according to the ancient 'Ganzhi period and Japanese law'. After the summer solstice, the third day of Geng (the day with the word "Geng" in the days of GaN and Zhi) is the first day of ambush, the fourth day of Geng is the middle day of ambush, and the first day of Geng after the beginning of autumn is the last day of ambush, which is called Sanfu. According to the solar calendar, it occurs from the middle of July to the middle of August. At this time, most of China is the hottest time of the year.
The origin of sunstroke: in ancient China, sunstroke was divided into three periods: one was the decay of grass, the other was the moistening of soil, and the third was the heavy rain. There are about 2000 kinds of fireflies in the world, which are divided into two kinds: Aquatic and terrestrial. The terrestrial fireflies lay their eggs on the dead grass. In the summer, the fireflies ooze out, so the ancients thought that the fireflies were made of rotten grass. The second is that the weather began to get sultry and hot, and the land was also very humid. The third is that there are often big thunderstorms. The heavy rain weakened the heat and humidity, and the weather began to transition to autumn 。
Different climate
There are also differences in climate between Sanfu and Daxue. As the time of the three volts is long, it is the beginning of summer when it first falls into the volts. At this time, the weather has not fallen to the extreme heat. However, after entering the middle volts, the temperature reaches a high peak, which is very hot and intolerable. And after entering the final fall, it is just after the beginning of autumn, when the weather gradually turns cool. The great summer heat is just around the middle of the valley. It's hot with thunderstorm, and it's also very humid and sultry.
Different customs
There are different customs between Sanfu and Dashu. There is a custom of sending "Dashu boat" in Zhejiang area of China. The custom of drinking summer sheep in Lunan area of Shandong Province. The custom of eating litchi in Putian, Fujian Province. The custom of eating "fairy grass" in summer in Guangdong. The custom of eating pineapple in summer in Taiwan. The custom of "Sanfu" mainly focuses on food, such as dumplings for toufu, noodles for Zhongfu and pancakes and eggs for Zhongfu.