Bengali Calendar is also called as Bengali Ponjika or Bangla Panjika. Download Free Bengali Calendar 1427, 2020 2021 Download online Free Bangla Panjika 1427, 2020 2021 Download Free Bengali Calendar 1427, 2020 2021 For all Free Durga Puja Dates So, the converted Bangla date displayed here for any Gregorian date prior to 1988 should be considered to be the correct date. Countries change, governments fall, cultures and languages change, people move from one place to another and what is fashionable today is gone tomorrow.