Is early autumn morning or evening?

Good morning and good evening in early autumn.

If the morning is in early autumn, the weather will be cooler, and if the evening is in early autumn, the weather will be hot and dry. In fact, this understanding must be wrong, because when you are in beginning of autumn, this day will naturally be beginning of autumn, and there is no difference between morning and evening, so beginning of autumn is good morning and good evening.

Attention.

The working people in ancient China accumulated a great deal of astronomical and meteorological knowledge in their production practice, many of which were expressed by folk proverbs, and their correctness stood the test of time.

The early autumn and late autumn mentioned in ancient proverbs should refer to the morning and evening of beginning of autumn in the lunar calendar, not the morning and evening of a day. Solar terms represent weather phenomena and are directly related to farming time. Moreover, the time of each solar term in the solar calendar is fixed, because the solar calendar is based on the revolution of the earth around the sun. August 7th or 8th every year is beginning of autumn.

But as far as the lunar calendar is concerned, the solar terms in beginning of autumn are quite different, sometimes as long as one month, so, of course, some are hot and some are cold, and the difference is much greater. So, let's not just understand its meaning literally, but think about it carefully.