"Cold or not? Look at the sky in the morning of July 20. " Tomorrow, July 2 1 day, this year is a cold winter?

If it rains on July 2 1 day, it may mean winter; If the weather is sunny and hot, it may be a relatively mild winter.

July 2 1 is the day used by the ancients to predict the cold and warm weather in winter. There are many agricultural proverbs to describe the weather on this day and use them to judge whether the coming winter is cold or warm.

There is an old agricultural proverb that says, "It rains and snows on July 21st". Through long-term observation and records of the natural environment, the ancients found that if it rains on July 2 1 day of the lunar calendar, it will snow frequently in the following 3949 years, which indicates that the cold winter is coming.

The cold winter is very beneficial to the safe overwintering of overwintering crops, and the cold snow weather can also freeze bacteria and eggs in the soil and reduce the occurrence of pests and diseases in the coming year. In addition, the snowy winter can also alleviate the drought in spring, which is beneficial to the growth of crops. Therefore, ancient peasant families hoped for a cold winter to ensure a bumper harvest.

There is also an agricultural proverb that says, "It is hot on July 21st, so you can wear light clothes in December." . It won't be too cold, but it will be a relatively warm winter. In addition, there are similar proverbs, such as "sunny and hot on the 21st, warm until the end of the year". These proverbs do not mean that winter will become warm enough to wear light clothes, but relatively warmer than usual.

The seventh month of the lunar calendar is the reason for "negative divination"

On the basis of the twenty-four solar terms of the lunar calendar, the ancients designed twelve news hexagrams, and two solar terms were one hexagram. The month is represented by Zi, Ugly, Yin, Mao, Chen, Si, Wu, Wei, Shen, You, Xu and Hai. According to the change of the sun's exposure angle in the four seasons, that is, the change of yin and yang, 12 is selected to represent1February.

Applying for the moon in July is a kind of "negative divination". It should be noted that July is about the same as the application time of the moon. July begins with the first day of the first year, and the application of the moon begins with the beginning of the autumn solar terms. The hexagram of "negative hexagram" is composed of three hexagrams below and three hexagrams above. The next three yin bones grew one by one from the solstice in summer, and in July, there were three yin and yang bones.

"Negative hexagrams" go up to Yang and down to Yin, and the qi of heaven can't come down, and the qi of the earth can't go up. In this way, if the yin and yang don't meet, the plant growth will slowly stop and autumn will begin. At this time, the fruits of spring and summer will be put away for winter storage. This is the meaning of "negative divination" in July among the four seasons.

Although "new divination" means that growth will stagnate in autumn, spring grows and summer grows. With the last round of autumn harvest and winter storage, the next round of life cycle can begin. In addition, the seventh month of the lunar calendar is also an important time node for the transformation of summer and autumn seasons in the second half of the year. Therefore, the weather changes in July of the lunar calendar were also valued by the ancients.