May 28, 2013 No Comments REMINDER: FREE 1/3 lb Burger at Back Yard Burgers Today On National Burger Day, May 28, 2013, first 100 guests at Back Yard Burgers will receive a FREE 1/3lb Classic Back Yard Burger. Locator. FREE 1/3 lb Burger at Back Yard Burgers on 5/28 – EXPIRED Facebook Twitter Add Comment Notify me of follow-up comments by email. Notify me of new posts by email.