What does ten-day mean? What do you mean thirty days?

Ten-day is a traditional time unit in China. Ten-day has two meanings. One is that 10 is a ten-day period, or 10 is a ten-day period. Another meaning is 12 years, which is determined according to the cycle of a zodiac. We usually divide every month into 30 days, morning, middle and evening. 10 days means 10 days, and a month is exactly 30 days. Some months have 365,438+0 days, and later periods have 65,438+065,438+0 days.

China's ancient time unit also had "Hou". "Hou" is actually a basic unit of time in ancient climatology and the smallest unit of time among the 24 solar terms. Among the 24 solar terms, the fifth day is the first class, and the third class is one breath. One waiting period is five days, and three "waiting periods" are exactly 15 days, which is exactly equal to the length of a solar term. Because of this, a solar term is called "three weather". Therefore, there will be three climaxes in beginning of spring, three climaxes in Mangzhong, three climaxes in beginning of autumn and three climaxes in the autumn equinox.