This software converts dates of Gregorian Calendar to their corresponding date of Bangla Calendar and vice versa. It also provides a way to save customized comments for any particular date, which will be displayed each time selecting the date. The rules of Bangla Calendar defined by Bangla Academy is applied here, which is followed by the Govt. of People's Republic of Bangladesh. It supports both Bangla and English interfaces. This software was awarded First Prize in the district level Science & Technology Week of Gazipur District, Bangladesh in 2000.