This week's book giveaway is in the OCMJEA forum. We're giving away four copies of OCM Java EE 6 Enterprise Architect Exam Guide and have Paul Allen & Joseph Bambara on-line! See this thread for details.
I would work with Rene's suggested code (no need to write your own conversion when Java has the API to do it for you)! You can also then look at Calendar and Locale classes in order to get things in the correct timezone etc.