An old birthday toast is, "Here's to a long life and a merry one, a quick death and an easy one, a pretty girl and an honest one, a cold beer and another one!" The sexual orientation of the person being toasted may require substitution of the word "girl."
Birthday sayings and toasts vary widely depending on the age of the person being celebrated. A suitable birthday saying for a child is, "You have brought so much joy and happiness into our lives. We love you little one. Happy birthday!" A birthday saying is most satisfying when spoken truthfully and from the heart.