Hi Gururaj,
Try This FM's CONVERSION_EXIT_SDATE_OUTPUT/CONVERSION_EXIT_IDATE_OUTPUT
Go through the below links briefly explained how to convert the date formats.
http://wiki.sdn.sap.com/wiki/display/Snippets/FUNCTION+MODULE+FOR+CONVERTING+DATE+INTO+THE+GIVEN+FORMAT
Regard's,
Shashi Kanth.