What day is cognac?

On the right of Dry Yi is twenty-one. 2 1 year means 2 1 year. 2 1 day is the 2nd1day of a month in China lunar calendar.

The 10th day of the first lunar month is the 1st to 10th day of the first lunar month, 11th to 20th of the first lunar month is 11th to 20th, and 21st to 29th of the first lunar month is 21st to 29th.

Twenty, both Chinese characters and pinyin are niàn, which means twenty.

Source: The Peach Blossom Fan Catching Society by Confucius in Qing Dynasty: "Look at the Thirteen Classics, the Twenty-first History, the Nine Schools, the Three Religions, the Hundred Essays, the Bad Essays, and the Novels. The upper and lower frames are full, and the high and low columns are connected." Among them, the 21st history is the 21st history.

The lunar calendar is a traditional calendar in China, and it has other names, such as the lunar calendar, China calendar, Xia calendar, Han calendar and national calendar. But the lunar calendar is not a lunar calendar, but a combination of yin and yang. Take the change period of the moon phase, that is, the length of the moon, as the month, and the length of the tropical year of the sun as the year. By setting 24 solar terms and leap months, the average calendar year can adapt to the tropic year.