What is the solar term on the first day of the Chinese zodiac in China?

The so-called first day is beginning of spring, which comes out in 2 or 3YY, because there is no authoritative calendar to adopt it like this. A year in the zodiac is the lunar year. The first constellation may be the beginning of the spring rain. See the almanac compiled by Purple Mountain Observatory, the dates of major newspapers and the officially published paper calendar. Those so-called online perpetual calendars can be compiled by anyone, and no one is reliable.