The Bangladeshi calendar (Bengali: বাংলা সাল, also called the Bangla Year) is a civil calendar used in Bangladesh, alongside the Gregorian calendar and the Islamic calendar. With roots in the ancient calendars of the region, it is based on Tarikh-e-Ilahi (Divine Era), introduced by the Mughal Emperor Akbar on 10/11 March 1584. Amartya Sen states that only traces of Akbar's influence survive. The calendar is important for Bangladeshi agriculture, as well as festivals and traditional record keeping for revenue and taxation.