Word 2003 Date Reformatting

Microsoft Word 2003 date reformatting

Hi all, I'm having a problem with Word 2003's dates and wondered if anyone can help please. I need to take an inserted date in a document eg. 19/3/09 to a nice formal date like the 19th of March 2009 with the th after the day date in superscript. I really hope someone can help as I am getting in...