How do you say "Clouds cover the sky on August 15th, and snow lights on January 15th"?

In rural areas, people often say "August 15th, in Yun Zheyue, it snowed on the 15th of the first month". What does this 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 year is cloudy, and the fifteenth day of the second year is likely to be snowy. How can it matter if it's six months apart? There really is.

There is a saying that people will call it a law: the rhythm of the weather. It means that after a certain weather appears, it will appear again after a while. Usually, the time interval is the number of days in a whole month (30, 60, 90, etc. ), and the rhythm from August 15 to 1 month 15 is 150 days, so there will be similar weather conditions!

However, it is still uncertain whether this statement is true or not. In ancient times, on the fifteenth day of the first month, people generally had the custom of watching lanterns in the garden, so there was a saying that it snowed on the fifteenth day of the first month.

The snow in the first month echoes the saying that "Xue Rui indicates a bumper harvest year", which indicates another good harvest. We can predict the snow on the fifteenth day of the first month of next year by the moon on the fifteenth day of August, so as to infer whether there will be a bumper harvest, and we have to admire the wisdom of the ancients.