The date of signature can be written as follows: "Xin Chou Dong Yue" or "Xin Chou Zhong Dong Yue". When signing, write the year in front and then the month.
Because 202 1 is an ugly year, the ancients called 1 1 "Jia Yue, Long Yueqian, Chang Yue, Gu Yue, Zi Yue, Fu Yue, Winter Solstice, Yi Yi, Xia Yue, Dong Yue, Chang Zhi and Huang Zhong", and you can choose from them. Of course, it is also true that some contemporary calligraphers write "202 1 year 1 1 month" for convenience.
The division of happy and ugly years:
The Year of Love and Ugliness is a year of the lunar calendar, such as 190 1, 196 1, 202 1 and so on. The cycle is 60 years. The so-called lunar calendar year, that is, trunks and branches are literally equivalent to trunks and branches. In ancient China, the sky was dominant and the earth was subordinate. The connection between heaven and stem is called heavenly stem, and the connection between earth and stem is called earthly branch. Together, it is called heavenly stems and earthly branches, or "dry branch" for short.
There are ten dry days, namely, A, B, C, D, E, Ji, G, Xin, Ren and Gui, and twelve branches, namely, Zi, Ugly, Yin, Mao, Chen, Si, Wu, Wei, Shen, You, Xu and Hai.