Summary: Today is National Pizza Day, and that means there are tons of deals and freebies to be had over the next week. So drop your original dinner plans—they were probably boring anyway—and get yourself a slice of heaven. Laura Northrop at The Consumerist has put together a list of all of the cheesy, stuffed crust, extra anchovy goodness. Some of the highlights include: Pilot Flying J: Get a free slice of pizza with a coupon from the chain’s Facebook page.