The influence of leap month setting on the morning and evening of seasons

This is really a misunderstanding. If we record the time of solar terms according to the lunar calendar every year, it is often wrong. Even in the long years when China was still using the "dry support year", people arranged their farming according to the 24 solar terms, not according to the lunar calendar. For example, the words "Before and after Tomb-Sweeping Day, point melons and grow beans" and "Before Grain Rain" circulating in the Yellow River Basin are real evidence. Leaping moon has no effect on the 24 solar terms, which is determined according to the relative angle between the sun and the earth. The longitude of the sun or something? Therefore, the date determined by the Gregorian calendar changes every year, but the magnitude is not large, just as the solar term Song said: the first half of the year is on the sixth day, and the second half is on the eighth day, with a difference of at most one or two days. Of course, local climate change will have an impact, but it is not necessarily related to leap months. What matters is the speed at which the weather warmed that spring. For example, there is a saying in the Yellow River Basin that "the poplars will not fall in September and the awns and wheat will not be cut". In other words, at the end of September, the tidbits of poplar will fall. If it is not healthy, the maturity of wheat in that year will be delayed, but it will not be linked with leap month. Therefore, the specific situation needs to be known to the local meteorological or agricultural departments, rather than with the help of leap months.