What does rain mean?

Interpretation: Rain, the second of the 24 solar terms, is located around the 15th day of the first month of each year (Gregorian calendar18-February 20th). The sun is located at 330 degrees of the yellow meridian.

Origin of 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 precipitation.

Overview of solar terms: Rain means that precipitation begins and gradually increases. Rain has two meanings, one is that the weather gets warmer and the precipitation increases gradually, and the other is that there is less snow and more rain. "Twenty-four solar terms" said: "In the first month, water is in the sky. 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. "

Date calculation:

Calculation of rainfall date [Y*D+C]-L

Interpretation of the formula: the last two digits of the number of years are multiplied by 0.2422 plus 18.74, and the whole number is subtracted from the number of leap years. 2 1 century rainwater c value is 18.73.

For example, the date of rain in 2008 = [8× 0.2422+18.73]-[(8-1)/4] = 20-1= 19, and it rained in February19.

Exception: The calculated rainfall date in 2026 should be reduced by one day, which is 18.

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