What month is the Millennium?

The Millennium is Wednesday, September 7, 2022 (August 12 of the lunar calendar). Millennium is the fifteenth solar term among the twenty-four solar terms, and autumn is the third solar term, indicating the end of the Qiu Meng season and the beginning of the Mid-Autumn Festival, which is an important festival reflecting the temperature changes in nature. The Millennium is the end of the application of the lunar calendar in the lunar calendar and the beginning of January. The time point is September 7th to 9th every year in Gregorian calendar, and the sun reaches longitude 165 degrees.

The origin of the twenty-four solar terms

The twenty-four solar terms were originally formulated according to the changes of the stars, which was the time system for the ancients to guide agricultural production. In the long farming society, the 24 solar terms have played an important role. The official written records of the twenty-four solar terms appeared in Huainanzi Astronomical Training in the early years of the Western Han Dynasty.

According to documents, four solar terms such as midsummer, midsummer, midsummer and winter solstice appeared in the Central Plains of northern China in Shang Dynasty, and eight solar terms appeared in Zhou Dynasty. The "twenty-four solar terms" currently listed in the Lunar Calendar come from the "Fixed Qi Method" concluded more than 300 years ago, which divides the ecliptic into 24 equal parts, separated by 15, forming 24 solar terms.

The "twenty-four solar terms" divided by the longitude of the sun are almost fixed in the international Gregorian calendar, with a difference of one or two days at most. Through historical development, according to the change cycle of the lunar phases, the lunar calendar takes each lunar phase as January and the year when the sun returns as the length of a year, plus 24 solar terms, setting leap months to make them even.