1. In Chinese fortune telling, there are mainly Bazi and Ziwei Dou Shu. In the theory of Bazi, Zishi is divided into two types: "Zao Zishi" and "Late Zishi", that is, 23:01-24:00 is called late afternoon, while 00:01~01:00 is called early midnight. Late midnight belongs to the same day, while early midnight belongs to the next day.
2. For example: Those born at 23:30 on March 30 are considered born on March 30, and those born between 00:01~01:00 are considered born on March 31.