Kālidāsa
The most popular theory is that Kalidasa flourished during the reign of Chandragupta II, and therefore lived around 4th-5th century CE. Several Western scholars have supported this theory, since the days of William Jones and A. B. Keith. Many Indian scholars, such as Vasudev Vishnu Mirashi and Ram Gupta, also place Kalidasa in this period. According to this theory, his career might have extended to the reign of Kumaragupta I (r. 414 – 455 CE), and possibly, to that of Skandagupta (r. 455 – 467 CE).
Kālidāsa
Several ancient and medieval books state that Kalidasa was a court poet of a king named Vikramaditya . A legendary king named Vikramāditya is said to have ruled from Ujjain around 1st century BCE. A section of scholars believe that this legendary Vikramaditya is not a historical figure at all. There are other kings who ruled from Ujjain and adopted the title "Vikramaditya", the most notable ones being Chandragupta II (r. 380 CE – 415 CE) and Yasodharman (6th century CE).