Must the first day of September be after the autumnal equinox?

The first day of the ninth lunar month is generally in the autumn equinox, or the cold dew solar terms. This season will usher in late autumn, and the temperature difference between day and night is very large. It can be said that there are depressions in 10,000 mu, autumn is strong, the chill is strong, and the autumn wind is rustling.

The first day of September is also the time when Mid-Autumn Festival and autumn alternate. Entering autumn means that winter is coming and the weather will get colder. Generally, due to the high latitude, the frost and snow in the central, eastern and northeastern parts of Inner Mongolia came earlier, and many places began to rely on heating to keep warm.