Who knows how to find out the time of spring in a certain year?

Hello, with the current technology, this is easy to calculate (with the current technology, long-term calculation is prone to minute-level errors). Divide 360 degrees of the earth's orbit by 24, and every 15 degrees is a solar term. This method was put forward in the Sui and Tang Dynasties and began to be implemented in the Qing Dynasty. Zero vernal equinox. Determined by the intersection of the ecliptic and the equator.

If you pay attention, it is easy to see that there is beginning of spring in the introduction of solar terms, which is the first solar term among the 24 solar terms, and also the beginning of the New Year and silver moon in the dry calendar; The arrival time is on February 3-5 of the Gregorian calendar every year (around the first day of the first lunar month). When the sun reaches longitude 3 15, it is easy to find that it is every 15. Hope to adopt.