Bangla Calendar, developed by OrkoNet LLC, is the official Bengali calendar used in Bangladesh. It provides users with dates from the year 1990 ADBD) to 10 years in the future. With this app, users can view any Bengali or Gregorian month and see the corresponding Bangla dates. Additionally, the app includes a Hijri calendar in the Bangla language.

The current Bangla calendar system in Bangladesh was defined by Bangla Academy, based on recommendations from Dr. Muhammad Shahidullah's committee. It has been the official calendar in Bangladesh sinceIt should be noted that the dates displayed in this app may not align exactly with the calendars still in use in West Bengal, as this is a modified version of the traditional Bengali calendar.