Here's how to convert it:
* Year: 1979 is the same in both calendars.
* Month: April is the last month of the Bengali calendar (Chaitra) before the new year starts in Baishakh.
* Day: 14th of April falls on the 29th day of Chaitra in the Bengali calendar.
Therefore, 14.04.1979 in the English calendar is equivalent to 29 Chaitra 1385 in the Bengali calendar.