In history, the year of b ugly is always that year.

Ezhou is an ancient method of calculating time, with a period of 60 years. Therefore, the year of 1898 does not refer to a certain year. The ugliness of B-ultrasound in the last year was 1985, and that of B-ultrasound in the next year was 1925, followed by 2045.

Ebony is one of the main branches, and Ebony Year is the second year of a cycle in the long history of China.

The second year of a cycle in traditional calendar years in China is called "ugly year". In the following AD years, if the number of years is divided by more than 60, or the number of years is reduced by 3, the remainder divided by 10 is 2, and the remainder divided by 12 is 2. The years from beginning of spring to beginning of spring in the following year are all "Ugly Years".

The chronology of cadres and branches begins in beginning of spring with 24 solar terms, and it is the chronology method of the calendar of cadres and branches. The same is true of the official almanac of past dynasties (that is, the Yellow Calendar). After the Republic of China, the emperor's year number was abandoned, so it was impossible to adopt a new chronology method. The lunar calendar can only record the year with dry branches, and its year range is from the first day of the first month to New Year's Eve, which is indisputable. However, the lunar calendar and the trunk calendar are two different calendars, which are different in the starting point of a year, the rules of dividing months and the number of days in each year. Due to the use of the Gregorian calendar after the Republic of China, many people lack calendar knowledge, so they often confuse the calendar with the lunar calendar.