"Slight cold is not cold, severe cold is not cold, but cold in spring", is it the coldest this winter?

A slight cold is followed by a severe cold, which is not cold but cold in spring. This sentence has already talked about the conversion of solar terms and some weather changes of natural laws. As we know, the 24 solar terms are a calendar, and the days of the Spring Festival and beginning of spring change greatly in the solar calendar. Then, why do the same solar terms appear, and there will be certain temperature difference changes in different years? This is not only a year's climate factor, but also related to some solar terms changes in the solar calendar month.

In principle, the temperature is not as low as the severe cold, just because the weather turned warmer and suddenly cooled down after beginning of spring. If this change from hot to cold is too fast, the human body will be psychologically or physically uncomfortable and feel very cold. Unlike winter, people are fully prepared and psychologically and physically acceptable. So it will be cold in late spring. Another reason is that, after all, there are few cold currents. If it is normalized, people will get used to it and not be afraid of the cold current.

According to the probability of late spring cold, usually, early in beginning of spring, it is prone to late spring cold before the Spring Festival. As we all know, according to the laws of nature, winter is warmer and cold is delayed. If beginning of spring is ahead of schedule, it is easy to have a cold spell. According to the Gregorian calendar, in 2020, beginning of spring will be on February 4th at 17: 3 and 12 seconds, and the first lunar month will be on 1 1. Beginning of spring was in the early years, so it's easy to catch a cold in spring. Due to the conversion between the solar calendar and the lunar calendar, there are four beginning of spring phenomena in beginning of spring: beginning of spring at the beginning of the year, beginning of spring at the end of the year, two spring years a year, and no spring years. Because the pure lunar calendar algorithm does not consider the movement law of the sun, and there will be changes in the number of days between the pure lunar calendar algorithm and the solar calendar algorithm, these situations will appear in the solar terms in beginning of spring.

According to the law of climate facts in normal years, the great cold is a relatively cold period, usually during the period of 3949, as the old saying goes: 3949 doesn't make a move, 5969 walks on the ice. Therefore, when it is cold, it is the coldest time of the year. Although there will be "peach blossom snow in March" in the Yellow River basin in some years, the temperature is not as cold as the great cold.