The World Association for the Development of Philately (WADP) and the Universal Postal Union (UPU) jointly conceived and developed the WADP Numbering System - WNS, which was launched on 1 January 2002.

BD001.09

Country / Post Bangladesh
Date of Issue 20 February 2009
Primary theme History (History of Peoples)
Literature, Press and Comics
Subject International Mother Language Day 2009
Width 32.0 mm
Height 41.5 mm
Denomination 0.50 BDT
Number in set 1
Layout/Format miniature sheet of 1
Perforations 12.5 by 12.5
Stamp issuing authority Bangladesh Post
Printer The Security Printing Corporation (BD) Ltd