Is the conversion of the zodiac based on beginning of spring or Spring Festival?

The zodiac is not divided by the first day of the first lunar month, but by the beginning of spring in the 24 solar terms. "Lunar Calendar" is the lunar calendar used in the Han Dynasty, with beginning of spring as the New Year's boundary, beginning of spring as the first of the 24 solar terms, and beginning of spring as the zodiac.

There are 10 dry days and 12 earthly branches between liujia concentration areas, that is, Zichou Yin Mao and Tatsumi Shen You Xu Hai at noon. Gregorian calendar is a "traditional lunar calendar", with the first "beginning of spring" in 24 solar terms as the starting point of the year, so the zodiac should be based on beginning of spring. Beginning of spring is the "first year". Some people take beginning of spring as the starting point of their new zodiac every year. The ecliptic in China is determined by the beginning of spring.

The solar calendar is a calendar based on the movement cycle of the earth around the sun. The solar calendar is about the relationship between the sun and the earth through heavenly stems and earthly branches, and the 24 solar terms and the zodiac are the basic contents.

The monthly calendar is a calendar arranged according to the moon phase cycle. The orbit of the moon around the earth is January, that is, the calendar month is determined based on the new moon, and a year is a calendar of twelve calendar months.