St David or Dewi Sant is the patron saint of Wales and his death (strangely!) is celebrated on March 1st. Schools across Wales celebrate this day with eisteddfodau. These consist of competitions with regard to poetry recitations, traditional dancing, choral, individual and folk singing, instruments, sketches, etc. I just finished comparing part of ours. Great day - all without a drop of alcohol! I'll wait until St. Patrick's Day for that. :)
Here's an example of how we're governed:
Cross-party support resulted in the National Assembly for Wales voting unanimously to make St. David's Day a public holiday in 2000. A poll conducted for Saint David's Day in 2006 found that 87% of people in Wales wanted it to be a bank holiday, with 65% prepared to sacrifice a different bank holiday to ensure this. A petition in 2007 to make St. David's Day a bank holiday was rejected by the office of the British Prime Minister, Tony Blair.