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).
Kumaragupta I Kumaragupta I, also known as Shakraditya and Mahendraditya , was an emperor of the Gupta Empire in 415–455 CE. He was the son of his predecessor, Chandragupta II, and Dhruvadevi (also known as "Dhruvasvamini"). He was an able ruler and retained, intact, the vast empire, which extended from Bengal to Kathiawar and from the Himalayas to the Narmada. He ruled efficiently for nearly forty years. However, the last days of his reign were not good. The Gupta Empire was threatened by the rebellion of Pushyamitras of central India and invasion of the White Huns (probably the Kidarites). But, Kumaragupta was successful in defeating both threats and performed the Ashvamedha (horse sacrifice) to celebrate his victory. He issued new coins with images of his namesake, Lord Kumara.