One of the most awaited annual celebrations – National Cheeseburger Day – is less than two days away, but Burger King has extended its celebrations for a whole week. Even health-conscious foodies would consider eating an extra burger on the occasion celebrating the popular fast food, especially when you can get it for free. Furthermore, a new report claims Burger King’s cheeseburgers to be the “least unhealthy”. Burger King has freebies for National Cheeseburger Day Burger King has free giveaways starting September 16 through September 22. Here’s everything you can grab this week to celebrate …