战国时楚历建正,学术界已作了不少讨论。较多学者主张楚历建正,这是由睡虎地简中与秦历的对照,以及楚历本身七至八月的名称确定的,验之包山2号墓简全部历日,无不符合。但有些学者主张楚历建丑,除这样可以同于三正说中的殷正外,还举有一个证据,是墓中出土有梅子。《包山楚墓》附录《包山简牍所反映的楚国历法问题》说:“包山2号墓出土植 During the Warring States period, the Chu calendar was established, and many academic circles have made a lot of discussions. More scholars advocate the establishment of the Chu calendar, which is determined by comparison between the simplified form of the tiger’s land and the Qin calendar and the name of the Chu calendar itself from July to August. . However, some scholars advocate the establishment of the ugly Churches, in addition to this can be the same as the three positive Yinzheng said, but also hold a proof that the tomb was unearthed plums. ”Baoshan Chu Tomb“ appendix ”Baoshan simple bamboo reflects the issue of the calendar of Chu“ said: ”Baoshan No. 2 tomb unearthed