Gengzi is one of the main branches, with a rank of 37. The former is Ji Hai, and the latter is Xin Chou. On the five elements of yin and yang, the Geng of heavenly stem belongs to the gold of yang, and the son of earthly branch belongs to the water of yang, which is the birth of golden water. The 37th year of a cycle in China's traditional calendar year is called "Gengzi Year". In the following Gregorian calendar years, if the number of years is divided by more than 60 and 40, or the number of years is reduced by 3, the remainder divided by 10 is 7, and the remainder divided by 12 is 1. The years from the first day of the first month of that year to the New Year's Eve of the following year are all "Gengzi Year".
Calendars are not commonly used, but calendars are mostly used for numerology. Therefore, it is based on the solar term month, not the new moon, which is different from the Gregorian calendar year based on the lunar year. In fact, the year of "Ganzhi" which has been widely circulated in recent years began in beginning of spring that year. This is a numerology view, not a common folk practice.
In ancient China, the time (year, month and day) was recorded by heavenly stems and earthly branches. There are 10 stems and 12 branches, which are combined in pairs, and one round is 60, which is called a flower. When a person reaches the age of 60, it is called "flower armor". Gengzi Day ranks 37th among 60 heavenly stems and earthly branches, the former is self-love, and the latter is hatred and ugliness. Gengzi Day is held every 60 days. For example, in 2009, 65438+1October 22nd (the fifth day of the ninth lunar month) was a boxer day, and 65438+February 20th (the sixth day of the eleventh lunar month) was also a boxer day.