Celtic Happy Birthday Greeting Card Celebrate being aÂ Celtic fanÂ with thisÂ Celtic Happy BirthdayÂ Greeting Card. This Celtic Happy Birthday Greeting CardÂ reads "Happy Birthday.Â Have a brilliant birthday!"Â There is lots of space to write your own personal message and this card comes with a Celtic badge as well. Order now for Delivery and same day dispatch when you order before 2pm Monday to Friday. Â Worldwide delivery also available.