"Cerdyn San Padrig"
Translation:A Saint Patrick's card
The card or Saint Patrick?
This is a huge tradition in Ireland and the Irish community abroad. My wife, who has an Irish passport, gets Saint Patrick's cards every year from her Irish born mother and other Irish relatives.
No - that's a 'Saint Patrick's Day card'! After all, you send a Mother's Day card, not a 'Mother's card'.
The season is 'Christmas', not 'Christmas Day'. There is no season of 'St Patrick'.