I've already told you that all Diamond and Pearl discussion goes in the Diamond and Pearl thread
. This is your final warning
There is also no way the release date is that early. If you look at games like Ruby and Spaphire you'll notice it took at least 4 months for the game to be released in the US after the JP release date. Bulbapedia even says that it is extremely unlikely that they were even talking about the US D/P release date.