《宋书·志·卷十二》
堡优兴起继承了塞丛，使用了《颛顼历》，历元是乙卯。一百零二二年后孝武皇帝才改用《太初历》，其历元是丁丑。
汉兴承秦，历用《颛顼》，元用乙卯；百有二岁，孝武皇帝始改《太初》，元用丁丑。
Pu Youxing's emerging inherited the Sai Cong and used the "Zhuan Xu calendar", whose calendar origin was Yimao. One hundred and twenty-two years later, Emperor Xiaowu changed to use the "Tai Chu calendar", whose calendar origin was Ding Chou.