As the saying goes, how do you count your head on the midsummer solstice? How many days have it been?

Summer heat, also known as "dog days", is the manifestation of the hottest period of the year in the Chinese old calendar. It can be divided into initial (first look), intermediate (second look) and final (third look).

"More" is ten days.

From summer to the third Geng Day in the future, the first Geng Day after beginning of autumn is the last Geng Day, the first Geng Day is ten days, the second Geng Day is ten or twenty days, and the second Geng Day is thirty or forty days.

Extended data:

The theory of "three volts" has a history of more than 2000 years. The word "Fu" is associated with the weather, and the yin is forced to hide underground by the yang, which is the most prosperous season in nature. The dog days appear between hot summer and hot summer, with high temperature, low air pressure, high humidity, low wind speed and fumigation in hot summer.

After lodging, the humidity of the ground becomes larger, and more heat is absorbed every day, less heat is released, and the heat on the ground accumulates, so it gets hotter every day. In addition, there is much rain and high air humidity in summer, which is also an important reason for the sultry weather. At the end of the day, it is partly cloudy and sunny, which is conducive to sunshine. As the ground radiation gets warmer, the weather becomes hotter.

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