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).
Chandragupta II
Several feudatories of Chandragupta are known from historical records:The following ministers and officers of Chandragupta are known from various historical records:"Jyotirvidabharana" (22.10), a treatise attributed to Kalidasa, states that nine famous scholars known as the Navaratnas ("nine gems") attended the court of the legendary Vikramaditya. Besides Kalidasa himself, these included Amarasimha, Dhanvantari, Ghatakarapara, Kshapanaka, Shanku, Varahamihira, Vararuchi, and Vetala Bhatta. However, there is no historical evidence to show that these nine scholars were contemporary figures or proteges of the same king. "Jyotirvidabharana" is considered a literary forgery of a date later than Kalidasa by multiple scholars. There is no mention of such "Navaratnas" in earlier literature, and D. C. Sircar calls this tradition "absolutely worthless for historical purposes".