Do This: Sunday is National Cheeseburger Day, people

To celebrate the food holiday, BurgerFi will offer $5 double cheeseburgers.

National Cheeseburger Day

714 S. Howard Ave., Tampa. Sept. 18, all day. $5 cheeseburgers. 813-440-2283.

BurgerFi is making its observance of National Cheeseburger Day double tasty.

The Florida-born burger franchise will offer $5 cheeseburgers — featuring double Angus beef, double American cheese, lettuce, tomato and its signature sauce — from open to close Sunday. To claim a burger, diners must show the offer on their phones (BurgerFi plans to post the deal to its social media pages), or simply ask for the discount, at the order counter.

BurgerFi has fast-casual restaurants locally in Tampa's SoHo neighborhood, Trinity and Sarasota.