And you thought Christmas in July was annoying. Here's a holiday -- National Cheesecake Day -- that is a pure sales gimmick. On Friday, July 30, cheesecake enthusiasts will celebrate half-price slices and a new flavor at The Cheesecake Factory. The 50% off deal is good on more than 30 flavors of cheesecake when you eat in the restaurant.

A new flavor, Reese's Peanut Butter Chocolate Cake Cheesecake, will make its debut on the "holiday" and $0.25 from the sale of every slice will benefit Feeding America, a charity devoted to fighting hunger. Get the new slice a day early and for just $1.50 when you "like" the company's page on Facebook and print a coupon.