Hello, this is my another work for bangla computing. I just made a small plugin to show english date in bengali in joomla1.5. Please don’t think that it will show bangla date everywhere in joomla. This plugin is just for the component com_content which shows the content/article. I gave name for this plugin is Bangla(bn-bd) date or Joomla Bangla date. This will show article create and modification date in our local language bengali. Here is screenshot for backend.
To make this plugin flexible, I tried to give so many options to configure for your joomla site to show dates in bangla. You can use this plugin as multi lingual mode easily as it has some advanced features like detect language or force to show bangla date. Even you can filter or configure for home page(front page or com_frontpage), full article mode, category filtering etc. Please check my post in post in amaderprojukti forum for details in bengali.