《新五代史·列传·杂传第四十五》
而古今所记载的，考察审定多有差误。《宣明历》气期正而星度得不到验证，《崇玄历》五星符合而每年差一天。以《宣明历》的气朔，合《崇玄历》的五星，两种历害相互参验，然后纔符合自前代各种历书，皆以天正十一月为一年的开头，用太古甲子马上元，积年越久，误差越严重。
而古今所纪，考审多差，《宣明》气朔正而星度不验，《崇玄》五星得而岁差一日，以《宣明》之气朔，合《崇玄》之五星，二历相参，然后符合。自前世诸历，皆起天正十一月为岁首，用太古甲子为上元，积岁愈多，差阔愈甚。
More than the ancient and present record, the examination and review are wrong. The "Xuanming Li" air period is correct but the star degree cannot be proved, the "Chongxuan Li" five stars are consistent but differ one day each year. Based on the air and date of the "Xuanming Li", combined with the five stars of the "Chongxuan", the advantages and disadvantages of the two calendars are mutually verified. Then it conforms to the various calendars of the previous generations, which all use Tianzheng's November as the beginning of the year, the ancient Jiazi Shangyuan, the accumulated years are longer, and the error is more serious.