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).
Haridasa
This movement was ushered in by the "Haridasas" ("lit" "servants of Lord Hari") and took shape in the 13th century – 14th century CE period, prior to and during the early rule of the Vijayanagara empire. The main objective of this movement was to propagate the Dvaita philosophy of Madhvacharya ("Madhva Siddhanta") to the masses through a literary medium known as "Dasa Sahitya" ("lit" "literature of the servants of the lord").