What is the origin of the first frost solar terms? Can we catch the first frost on the wedding day?

What is the origin of the first frost solar terms?

From the early Qing Dynasty (1645) to the present, solar terms have always been divided by the method of fixing qi. When the sun reaches longitude 2 10 degrees, it is the first frost solar term. After the first frost, the weather is cold in the morning and evening, hot at noon, and autumn dryness is obvious.

The first frost solar term reflects that the temperature difference between day and night changes greatly and the weather becomes cold, but it does not mean that frost will fall when entering this solar term.

In fact, frost didn't fall from the sky. Frost is the condensation of water vapor on the ground when it meets cold air due to the change of temperature difference.

Because first frost is a manifestation of cold weather and large temperature difference between day and night, the first frost is named after this festival, which means that the temperature drops suddenly and the temperature difference between day and night is large. The first frost festival is the transition from yang to Tibet. As the saying goes, the first frost kills a hundred herbs. After the first frost, the plants gradually lost their vitality and the land was desolate.

The ancient book "Twenty-four solar terms" said: Qi stagnates at the beginning of frost, and Yin begins to coagulate. It can be seen that the first frost indicates that the weather is getting colder and colder, and Yin Qi is beginning to condense.

After the first frost solar terms, cold air often invades, resulting in a sudden drop in temperature, a great change in temperature difference between day and night, and obvious cold in the morning and evening. The most obvious solar term of the first frost is the large temperature difference between day and night. Can we catch the first frost on the wedding day?

Lunar calendar: September 7, 2020

Gregorian calendar: 20201Friday, October 23rd 10, Scorpio.

Today's almanac is appropriate.

Don't use the daily value at the new moon.

Enter the house, visit the market, set up coupons, collect money, and build a meridian house.

Take animals to sleep, pray and sacrifice, travel, raise animals and seek wealth.

Seek medical attention, remove the plant and open the light.

Today's old almanac is taboo.

Don't use the daily value at the new moon.

Build land, buy land, break ground, build dikes, release water and open warehouses.

Bury, marry, accept

Because this day belongs to the broken day that is not used for major events, it is not ideal to catch up with the first frost on the wedding day. It is suggested to choose another auspicious day, because marriage usually chooses auspicious days, and the gas field of solar terms is unstable. If you get married according to the solar terms, it may have a negative impact on your married life.

First frost calculation method

Calculation formula of first frost date: [Y*D+C]-L

Interpretation of the formula: Y= two digits after the number of years, D=0.2422, L= leap year, 2 1 century C=23.438, and 20th century C=24.2 18.

For example, the frost date in early 2088 =[88? 0.2422+23.438]-[88/4] = 44-22 = 22,65438+1the first frost on October 22nd.

Exception: calculation result in 2089 plus 1 day.