Hello! I had dinner at Be Our Guest on March 18th, 2017 for my birthday. Not only did I receive a helping of Grey Stuff, but I also received a card and the dessert I originally ordered for free with a candle in it. I was celebrating my 18th birthday and was wearing a birthday pin. We did not mention it being my birthday or explained anything. One thing to note, however, is that we are close family friends with the original manager and one of the main contributors to the opening of the restaurant (hence how we were able to get a reservation on short notice) and our waiter was one of the original waiters who had known our friend. As others mentioned, I really do think it depends on the waiter but I think chances are likely that they'll recognize your birthday (as they have for previous annual birthday trips)!