Is the zodiac based on the solar calendar or the lunar calendar?

The zodiac is set according to the China lunar calendar. China does, but foreign countries don't.

According to the China calendar, this genus is divided into beginning of spring. The division of the two zodiac signs is not based on the Gregorian calendar's 65438+ 10/,nor on the first day of the first lunar month, but on the beginning of spring solar terms in the twenty-four solar terms.

China Gregorian calendar uses beginning of spring to determine the zodiac. The "lunar calendar" is the lunar calendar that began to be used in the Han Dynasty. The New Year is bounded by beginning of spring, beginning of spring is the first of the 24 solar terms, and the zodiac is based on beginning of spring.