Gir doesn't know Gir's own birthday. When does Gir gets its own birthday cake with the candles and frosting and om nom noms? Gir wants to know. Gir NEEEDS to know!
I can't remember your birthday Gir, but I do remember you arriving.
I don't think you are ten years old yet though. Certainly less than twenty. We're cooking up a load of birthday pork-rinds here - should I send you some?