Happy St David’s Day 2016: Who was the patron saint of Wales and why do we celebrate on March 1st? – Daily Telegraph March 1, 2016 by Fulcrum March 1st is when people around the world celebrate the patron saint of Wales, but what do we know about the man and why do we remember him? Juliet Eysenck. Daily Telegraph 1 March 2016 FulcrumShareTweetShare