Are there thirteen solar terms in western countries?

No, solar terms refer to 24 solar terms and climate. It is a supplementary calendar made by China to guide farming in ancient times, and it is the crystallization of the long-term experience and wisdom of the Han working people.

Since China was an agricultural society in ancient times, agriculture needed to have a strict understanding of the operation of the sun, and farming was carried out entirely according to the sun. Therefore, the "twenty-four solar terms" that reflect the solar cycle alone are added to the calendar as the standard for determining leap months.

China's orthodox 24 solar terms are based on Henan. China's lunar calendar is a combination of yin and yang, which is based on the movement of the sun and the moon, so adding 24 solar terms can better reflect the cycle of the sun's movement.