St. David's Day!
http://en.wikipedia.org/wiki/Saint_David's_DayDewi Sant – St. David was born towards the end of the fifth century, less than a hundred years after the last Roman legions had marched out of Wales. He was the son of Sant a scion of the royal house of Ceredigion, his mother was Non, daughter of Cynyr of Caio, remembered by numerous churches and holy wells in Wales, Cornwall and Brittany. Educated at Henfynyw (Old Menevia) in Ceredigion, where he 'learned the alphabet, the psalms, the lessons for the whole year, the Masses and the Synaxis', he founded a Celtic monastic community at Glyn Rhosin (The Vale of Roses) on the western headland of Sir Benfro, at the spot where St. David's Cathedral stands today. The spot may well have been the site of a very early religious community, for it is also associated with St. Patrick, the patron saint of Ireland, who was also born in Wales and is said to have spent time at Glyn Rhosyn before embarking again (this time voluntarily) for Ireland from Porth Mawr nearby.
David's fame as a teacher and ascetic spread throughout the Celtic world. He earned the curious nickname Dewi Ddyfrwr – David the Waterman – no doubt reflecting the harsh bread-and-water regime of Celtic monks. Many traditions and legends are associated with him. When he rose to address to a great crowd at a synod at Llanddewi Brefi in Ceredigion, the ground rose under his feet forming a little hill so that all could hear him speak. Again, a golden-beaked dove is said to have landed on his shoulder as a symbol of his holiness.
His foundation at Glyn Rhosin became one of the most important shrines of the Christian world, and the most important centre in Wales. Roads and tracks from all over the nation led to it and in the Middle Ages two pilgrimages to Menevia was equal to one to Rome (Dos i Rufain unwaith ac i Fynyw ddwywaith). Over fifty churches and innumerable holy wells were dedicated to him in Wales alone.
The religious centre of St David's thus became a focus for the religious aspirations of the Welsh nation and as Gerallt Cymro (Giraldus Cambrensis) relates: The Bishopric of St Davids became ... a symbol of the independence of Wales ... and that is why David himself was exalted into a Patron Saint of Wales.