In Warhammer 40,000 the human Imperium of Man uses a different dating system for official documents. As such writing background fiction can be irritating due to the conversion needed if one wants to create proper Imperial dates. This calculator creates Imperial format dates to solve that problem. Like my previous project this takes into account leap years. It avoids rounding but complete precision isn't possible due to the nature of the system (A year is divided into 0 - 999). This calculator does not add the check digit - that's up to the user to decide. "X" isn't a valid check digit, it's simply a placeholder. Read about the dating system here for more information: http://wh40k.lexicanum.com/wiki/Imperial_Dating_System The graphics and sound are included as a course requirement, not because they're actually necessary. Background artwork created by Clayton Tait and licensed under a Creative Commons Attribution-Non-Commercial-Share-Alike license.