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).
Empress Zhang (Liu Shan's second wife) Empress Zhang (birth and death dates unknown), personal name unknown, was an empress of the state of Shu Han in the Three Kingdoms period. She was a daughter of the Shu general Zhang Fei and a younger sister of Empress Jing'ai. In 237, she became an Imperial Consort (貴人) of the Shu emperor Liu Shan. In the first lunar month of 238, she became the empress, succeeding her elder sister, who died in the previous year. In 264, after Shu was conquered by the rival state of Cao Wei, Empress Zhang accompanied her husband to the Wei capital Luoyang.