What do you mean it rains on holidays? Let me tell you something.

1, the rain around February 18 of the Gregorian calendar every year is the second of the 24 solar terms in the lunar calendar. Rain not only indicates the beginning of rainfall, but also indicates that rainfall begins to increase. "Calendar" said: "Fighting means that the king is rain, the east wind thaws, and the ice and snow disperse into water and turn into rain, hence the name rain.

2. In ancient China, rainwater was divided into two periods: "First, Tyrannosaurus Rex sacrificed fish, second, geese came, and third, vegetation sprouted." It shows that in the rain solar term, otters began to fish for five days, and geese began to fly back to the north from the south. Five days later, flowers and trees quietly spit out buds in the continuous spring rain. Since then, the temperature has risen, and the earth has gradually begun to show a thriving scene. Du Fu has a poem: "Good rain knows the season. When spring comes, you sneak into the night with the wind and moisten things silently."

Rain is the first of the 24 solar terms. Every year around the 15th day of the first month (February 18-20 in Gregorian calendar), when the longitude of the sun reaches 330 degrees, it is the rain of 24 solar terms. At this time, the temperature rises, the snow melts and the precipitation increases, hence the name rain. Generally, the rainy and rainy solar term begins on February 18 or 19 of Gregorian calendar and ends on March 4 or 5. Rain, like Grain Rain, light snow and heavy snow, is a solar term reflecting more precipitation.

4, "Twenty-four solar terms" "In the first month, life is full of water. Spring belongs to wood, but there must be water for those who grow wood, so there is rain in beginning of spring. If the east wind melts, it will disperse into rain. " It means that everything begins to sprout before and after the rain and solar terms, and spring is coming. For example, Yizhoushu has excellent phenological records such as "vegetation sprouting" after the rain.