July 30 is National Cheesecake Day and what better way to celebrate than to go to the leading restaurant chain for cheesecake, Cheesecake Factory.Cheesecake factory is celebrating in more ways than one this year. Today they debut a new flavor, the Oreo Dream Extreme Cheesecake and they are also offering half off of any slice of cheesecake for two days, on July 30 and 31. "In our fifth year of celebrating National Cheesecake Day, we couldn't be more excited to have created this memorable cheesecake featuring the world-famous Oreo cookie, which is celebrating its 100th birthday this year," said David Overton, founder of The Cheesecake Factory.