What century did Shulgi reign for 48 years?
Babylonian calendar The Babylonian calendar was a lunisolar calendar with years consisting of 12 lunar months, each beginning when a new crescent moon was first sighted low on the western horizon at sunset, plus an intercalary month inserted as needed by decree. The calendar is based on a Sumerian (Ur III) predecessor preserved in the Umma calendar of Shulgi (c. 21st century BC).
History of Ming The History of Ming, "History of the Ming", or "The Ming History" (Míng Shǐ) is one of the official Chinese historical works known as the Twenty-Four Histories of China. It consists of 332 volumes and covers the history of the Ming Dynasty from 1368 to 1644. It was written by a number of officials commissioned by the court of Qing Dynasty, with Zhang Tingyu as the lead editor. The compilation started in the era of the Shunzhi Emperor and was completed in 1739 in the era of the Qianlong Emperor, though most of the volumes were written in the era of the Kangxi Emperor.