[1][2] While there is some debate among historians about the start of the era, most currently agree that it is 1118-1119 AD.
[4] Scholars have used Abul Fazl's Akbarnama, dates mentioned in Sanskrit, Bengali and Maithili manuscripts, and copper-plate inscriptions to deduce the start of the era.
[2] In the Akbarnama, Abul Fazl mentions that "in the country of Bang (Bengal) dates are calculated from the beginning of the reign of Lacchman Sen".
[4] (The Tarikh-e-Ilahi would later serve as the basis of the Bangladeshi calendar.
[6] The era was used in many manuscripts produced in Bengal and Bihar for at least the next 400 years.