From Tasty.

FREE FOOD on your birthday?! From Starbucks to Krispy Kreme, here are spots giving out birthday freebies! You MUST already have created and signed up for a rewards account before your actual birthday in order to claim. I recommend signing up at least a month before so you don’t run into any issues. Also, for Krispy Kreme you must have already made a purchase on your account prior to the day of your birthday in order to redeem! @juanbiteatatime