What does the phrase "August 15th, Yun Zheyue, the fifteenth day of the first month snows and lights are lit" mean?

"Yun Zheyue on August 15th" refers to the Mid-Autumn Festival on August 15th every year. If clouds cover the bright moon at night, there will probably be snow on the fifteenth day of the first month in five months. In other words, the fifteenth day of the first month is cloudy, and there is likely to be heavy snow on the fifteenth day of the first month next year.

"On August 15th, Yun Zheyue, it snows and lights on the 15th day of the first month" is an agricultural proverb circulating in China. It is the weather forecast experience summarized by the working people in our country in the long-term production practice, which reflects the echo relationship between holiday weather.

Such agricultural proverbs include:

1, millet can't be cut in autumn equinox, and millet with cold dew can't be raised.

2. There is no rain in beginning of autumn, and there is little rain in autumn; There is no rain for a thousand years and no frost for a hundred days.

3, long summer, mulberry old wheat.

4, there is water to have a valley, and there is no water to cry.

5. Planting mountains in summer, Pingchuan Bailu, especially in autumn, and cold dew in the river bend.

6, turtle back tide, rain omen.

7. White dew is early, cold dew is late, and wheat is being planted in the autumn equinox.

8. Smell cicadas in early autumn and welcome Tian Yu in late autumn.