Is Lesser Heat the beginning of the dog days? Is Lesser Heat the first day of the dog days?

Is Lesser Heat the beginning of the dog days? Is Lesser Heat the first day of the dog days?
Speaking of the Lesser Heat solar term, I believe everyone is familiar with it. The Lesser Heat solar term is also around the dog days. So, let’s take a look at whether the Lesser Heat is the beginning of the dog days? Is Lesser Heat the first day of the dog days? Summer cicadas chirp in the fifth month of the lunar calendar, so they are called Mingci. If you want to know more about the fifth month of the lunar calendar, please pay attention to Mr. Shui Mo’s special topic on the fifth month of the lunar calendar!

Is Lesser Heat the beginning of the dog days?

No, the Lesser Heat solar term does not belong to the so-called Entering the Dog days. The so-called Entering the Dog days refers to the beginning of the Three Dog days, which are the days with the highest temperature, humidity and heat in the year. The "Fu" in "Three Fu Days" refers to "Fu Xie", which is the summer evil among the so-called "Six Evils".
The Lesser Heat solar term is the eleventh solar term of the twenty-four solar terms in the lunar calendar and the fifth solar term in summer, marking the official start of the midsummer season.
Therefore, there is a certain difference between the Lesser Heat solar term and the beginning of the dog days. Therefore, the Lesser Heat solar term does not mean the beginning of the dog days.

Is Lesser Heat the first day of the dog days?

No, the Lesser Heat solar term is not the first day of the dog days.
The dog days occur between the Lesser Heat and the End of Heat. The first dog days are 20 days away from the summer solstice at the earliest and 30 days away at the latest, while the Lesser Heat is 16 days away from the summer solstice.
However, under normal circumstances, after entering the Lesser Heat solar term, it will take another week before the dog days of summer officially begin.
As the saying goes, "The third Geng day after the summer solstice marks the beginning of the dog days," which means that the dog days begin on the third Geng day after the summer solstice.
The so-called "three dog days" actually refers to the first dog days, the middle dog days and the last dog days. The dog days of summer mostly occur between mid-July and mid-August in the Gregorian calendar.
The three hottest days of the year are calculated from the third "Geng" day after the summer solstice, which includes the first dog days (10 days), the middle dog days (10 or 20 days), and the last dog days (10 days, starting from the first Geng day after the beginning of autumn).

Introduction to the dog days of summer in 2021

The specific time of the dog days in 2021 is:
July 11, 2021 to July 20, 2021 is the first 10 days of the dog days.
July 21, 2021 to August 9, 2021 is the 20-day period of the mid-summer season.
August 10, 2021 to August 19, 2021 is the last 10 days of the dog days.

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