The beginning of spring delivery time

The solar term in beginning of spring means that it will be reached one day. For example, the winter solstice is 65438+February 22, which means that this day 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 term "solar terms" is not only commonly used in astronomy to indicate the change of solar terms, but also commonly used in China traditional culture. For example, in the traditional geomantic theory, when calculating numerology and marriage theory, there is a so-called "cross-knot month". In divination, it is considered that moving is not as good as static, and this change is a good thing, which may refer to the change at a specific time.

The origin of beginning of spring:

Since the Qin Dynasty, beginning of spring has been the beginning of spring in China. Beginning of spring is divided from astronomy, but in nature and people's minds, spring is warm, birds are singing, flowers are fragrant, and spring is growth, cultivation and sowing.

In climatology, spring refers to the period when the average temperature is 10℃ to 22℃ for five consecutive days. Speaking of beginning of spring, people obviously feel that the days are getting longer and the sun is getting warmer. Temperature, sunshine and rainfall are often at the turning point of the year and tend to rise or increase. The growth of crops in early spring is accelerated, and the water consumption for bolting rape and jointing wheat is increased. Irrigation and topdressing should be done in time to promote growth.