Burger King's birthday promotion is designed to make customers feel celebrated. When customers join the BK Royal Perks loyalty program, they receive a birthday reward that often includes a free menu item, like a Whopper, fries, or dessert, on their special day. 

The rewards are automatically loaded onto the participant's account and are redeemable during the birthday period. This initiative provides an extra incentive for customers to sign up for the loyalty program, allowing them to earn more rewards and benefits throughout the year. Terms and conditions apply, and they are usually outlined during registration or within the app.