佛祖歷代通載 21.79

21.79

（庚辰）　十七年二月宜中（奉衛王自落鶴經占城回。四月復入厓山。張世傑死未幾。二廣皆歸一統。六月新曆成。賜名授時。明年始頒行天下）。

(gengchen) In the seventeenth year, in the second month, Yizhong (escorted the Prince of Wei back from Luohu via Champa. In the fourth month, they re-entered Yaishan. Not long after Zhang Shijie died, both Guang regions were unified. In the sixth month, the new calendar was completed and granted the name Shoushi Calendar. In the following year, it began to be promulgated throughout the empire).