釋氏稽古略 3.105

3.105

庚子久視元年冬十月。制復以正月為十一月。一月為正月。

In the gengzi year, the first year of the Jiushi reign era, in winter, the tenth month, it was decreed that the first month be made the eleventh month again, and that the twelfth month be made the first month.