When is Jiazi?

Jiazi is from 23: 00 p.m. to the next morning 1: 00, which is the first time in ancient times. In ancient times, people divided the whole day (day and night) into twelve hours, and each hour is equivalent to two hours now. Jiazi time only appears on the first day or the second day, that is, the first hour of these two days, so only on these specific days, from 23: 00 pm to the next morning 1 will it be called Jiazi time. In ancient times, a day and night was divided into twelve hours, that is, one hour was equivalent to two hours, and twelve hours were equivalent to twenty-four hours, from 23: 00 one day to 1 the next day. Starting from Jiazi Day, the time branches of this day are Jiazi, Ebu, Bingyin, Ding Mao, Chen Wu and Keith in turn, and the cycle is repeated according to 60 Jiazi. According to its inherent law, the ancients also summed up a formula as follows: A plus A, B plus C as the beginning. Bing Xin starts from E, and a man is born as a boxer. How can I send it? That is to say, only when there is Jiazi in Grade One or Grade Two.