but really couldn’t find anything useful. So I eventually came up with the following Flex function to place in a script block in my Graph Component . private function monthLabel(categoryValue:Number, previousCategoryValue:Object, axis:CategoryAxis, categoryItem:Object):String { var months:Array = ["Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"]; return months[categoryValue - 1]; } And within the MXML I used a Category