Best September deals: Your guide to the month’s freebies and bargains

If National Cheeseburger Day is anything like National Burger Day, which was held in May, we can expect a long list of specials. Download the chain’s new Wayback App by Sept. 17 for a National Cheeseburger Day buy-one-get-one free deal Sept. 18. Also earn a free classic burger after making your first in-app purchase and earn other freebies.