When was it ugly?

Didn't say self-humiliation is a timeline. As the time of day, only ugly, every day is 1-3 o'clock. The ancients divided a day and night into twelve hours, which were represented by twelve place names and the word "time". Namely Zi Shi, Chou Shi, Yin Shi, Shi Mao, Chen Shi, Shi Si, Noon Shi, Wei Shi, Shen Shi, You Shi, Qi Shi and Shi Hai.

Every moment is equivalent to two hours today. The relationship between these twelve hours and the current timing method is: from midnight to 1 hour, from clown to1hour to 3: 00, from Yin Shi to 3: 00 to 5: 00 ... and so on, the sea time is 2 1 hour to 23: 00.

Ugly year:

The 26th year of a cycle in China's traditional calendar year is called "the year of self-humiliation". In the following Gregorian calendar years, if the number of years is divided by more than 60 and 29, or the number of years is reduced by 3, the remainder divided by 10 is 6, and the remainder divided by 12 is 2. The years from the first day of the first month of that year to New Year's Eve of the following year were "ugly years". Ming Dong Qichang's "Sacrificing Yuan Huan Gong to the Stars": "(Yuan Keli) Wu Zixu (1588) grew up in the countryside and became a scholar."

The lunar calendar is not a dry calendar, but solar terms are used to guide agricultural production. Branches and branches are not divided into solar terms, regardless of traditional habits or official calendars (see the perpetual calendar compiled by Purple Mountain Observatory of Chinese Academy of Sciences for details).