When is the delivery time in Tomb-Sweeping Day?

The delivery time in Tomb-Sweeping Day is 15.

"Solar term" means reaching this solar term one day. For example, the winter solstice is 65438+February 22nd, which means that 65438+February 22nd is the winter solstice season. The specific time of the 24 solar terms every year is uncertain and is calculated according to the solar cycle.

The twenty-four solar terms were very important in ancient times. In ancient China, agricultural irrigation depended on rivers, and farming was mainly concentrated in the Yangtze River and Yellow River basins. Until now, farmers in these areas are still engaged in agricultural production according to solar terms, temperature and precipitation.