The rumours about the Diablo III release date were quashed by Blizzard’s Community Manager via Twitter, @Bashiok, he said: “Diablo III does not have a release date. Any store or person claiming otherwise is guessing,” added by Akardo.
For all of you who have been waiting for the ages it looks like Diablo 3 finally has an official release date! Well….Best Buy official that is. It seems that in Rochester, Minnesota a countdown display for the game was spotted inside of a Best Buy store. Blizzard has not commented on this yet but it looks like Best Buy’s website reads the same date. For proof the picture is below, it has been checked and it is legitimate. IGN and Joystiq are looking for comments from Blizzard soon.
Gaming and Tech Network 
The reason for the blunder? They are required to put a release date into the computer system before they can sell any pre-orders. site admin decided to put Feb 1st in as that would be the day that they would start selling pre-orders.