What is ugly day?

In ancient China, heavenly stems and earthly branches was often used to mark age, including ten heavenly stems: A, B, C, D, E, Ji, G, Xin, Man and Ghost; There are twelve branches: Zi, Ugly, Yin, Mao, Chen, Si, Wu, Wei, Shen, You, Xu and Hai. The combination pattern of heavenly stems and earthly branches is the heavenly stems and earthly branches. Heavenly stems and earthly branches together is sixty jiazi:

1 ~ 10 Jia Chou bing yin ding Mao Ji si Geng Wu Shen

1 1~20 A, B, H, C, D, Ugly Mao, Xin Siren, Wu Guiwei.

2 1~30 Shen Jia Yiyou Xu Bingding Wu Haizi Ugly Geng Yin Xin Mao Chen Ren Gui Si

3 1~40 Wu Jia B did not apply for Ding You, the Reform Movement of 1898, and Ji Hai Geng Angel was ugly and benevolent.

4 1~50 Chen Jiayi Wu Bing Ding Wei Ji Shen You Geng, 19 1 1 Ren Zi Gui Chou

5 1 ~60 Jia Maobing Chen Dingwu was not worried about Ren Xu Guihai.

The sad and ugly day you mentioned is one of the days when you use this method. The exact date depends on the year and month. For example, today is February 24, 20 1 1 year, today is Geng Xuri, and tomorrow is Xinhai Day ... Understand?