What do you mean, three days and seventeen thunder?

March 17 refers to the lunar calendar, thunder refers to rain, and the rural proverb "March 10 and 7, it rains, which is a good omen."

The saying that it will rain on March 17 of the lunar calendar actually comes from "March 10, 7, and rain indicates a good year". This sentence has clearly explained today's weather, so it can also predict the good years in the future. The ancients valued the 17th day of the third lunar month, mainly because this time period was special. This time is in the twenty-four solar terms, before the long summer solar terms, which is the key time for farmers to sow in spring. At this time, early rice planting needs water, wheat growth needs water, and corn sowing needs water, so the rain at this time is really as expensive as spring rain.