《史记·八书·历书》
周襄王二十六年有闰三月，《春秋》书中非难它置闰月不当。
周襄王二十六年闰三月，而春秋非之。
In the 26th year of King Xiang of Zhou, there was an intercalary third month. The Spring and Autumn Annals criticized the improper placement of the intercalary month.