《宋书·志·卷十四》
用前代检验后代，意指轩辕、高辛、夏后氏、汉都是以十三月为一年之始；少吴、有唐、有殷都是以十二月为一年之始；高阳、有虞、有因都是以十一月为一年之始。
以前检后，谓轩辕、高辛、夏后氏、汉，皆以十三月为正；少昊、有唐、有殷，皆以十二月为正；高阳、有虞、有周，皆以十一月为正。
To use the previous generation to inspect the next generation means that Xuan Yuan, Gao Xin, Xia Hou Shi, and Han all start the year with the thirteenth month; Shao Wu, You Tang, and You Yin all start the year with the twelfth month; Gao Yang, You Yu, and You Yin all start the year with the eleventh month.