The twenty-four solar terms are a solar term in the lunar calendar, but why are they so consistent with the date of the solar calendar? For example, the winter solstice is 65438+ February 22 or 23 every year according to the solar calendar, which is quite accurate!

In ancient China, the lunar calendar was determined according to the moon's waxing and waning, while the solar calendar was based on the sun. Climate change is related to the sun, and agricultural production is based on climate. The lunar calendar is usually 20 days worse than the solar calendar. The lunar calendar usually has little to do with the climate and is not as accurate as the solar calendar. Therefore, in order to facilitate agricultural production, our people have formulated 24 solar terms. Therefore, the 24 solar terms are not fixed in the lunar calendar, but are relatively fixed in the solar calendar.