Is the yellow calendar solar or lunar?

The yellow calendar is the lunar calendar.

The yellow calendar, also known as the lunar calendar or lunar calendar, is a traditional calendar system in China. It is based on the period of the moon, based on the phase change of the moon, and the start and end time of each month are related to the period of the moon. In contrast, the Gregorian calendar, also known as the Gregorian calendar or Gregorian calendar, is a calendar system based on the period of revolution of the earth around the sun, with a unit of one year. Gregorian calendar plays an important role in China's traditional culture and is widely used in agriculture, solar terms, religion, folk customs and so on.