Why do old people say that the snow hits the lamp on the 15th day of the first month?

The traditional rural folk song, August 15 clouds cover the moon, the next year the first month of the fifteenth snow hit the lamp, which predicts a good year in the coming year. The reason for this is that there is a rhythmic relationship between the weather. Rhyme means that after the appearance of a certain kind of weather, it corresponds to the weather that will appear in the next few days.

The more recognized are 30 days, 60 days, 90 days, 120 days, 150 days, 180 days and 240 days. And "August 15 clouds cover the moon, the first month of the 15th snow hit the lamp" according to the lunar calendar, exactly 150 days of rhyme. Historical data verify that whenever the Mid-Autumn Festival day cloud cover the sky, cloudy or rain, the next year the first month of the fifteenth day will be cloudy or snow.

"Clouds cover the moon" and "snow hit the lamp", on the surface of the cloud and snow echo phenomenon, in essence, is the echo of the relationship between the two cold air activity, that is to say, before and after the Mid-Autumn Festival, if there is cold air activity, resulting in a "clouds cover the moon" phenomenon. Then, before and after the Lantern Festival, there will be cold air invasion, the formation of "snow hit the lamp" situation.