Why does Oda Yue in September have another name?

Because there are two solar terms in this month, some crops mature in this month, which is also the month of labor, so it is called Odayue.

The Millennium is the fifteenth of the twenty-four solar terms, and it is the end of the full moon in the calendar and the beginning of January. The time is from September 7th to 9th every year in Gregorian calendar, when the sun reaches 165 degrees. "Twenty-four solar terms" said: "August Festival ... Yin Qi is getting heavier and heavier, showing white." When the weather turns cold, you will find many dewdrops on the ground and leaves in the morning, named after the water vapor condenses on them at night.

The autumnal equinox is the sixteenth solar term in the twenty-four solar terms of the lunar calendar, usually on September 22nd or 23rd every year.