St. David, Patron Saint of Wales

During the life of Saint Patrick (Ireland's Welsh born patron saint) an angel foretold him the birth of a man who would become Wales' patron saint. 30 years later, a nun named Non gave birth to a boy named David in a cloister (covered walk) called Ty Gwyn (tee gwin) near modern day Whitesand Bay. Although he was baptised with the name David, he was known as Dewidd by his mum or Dewi to the locals.
As an adult, David became a missionary and spread Christianity throughout Wales. A missionary is a person who is sent on a religious mission to promote Christianity in a foreign country. David rededicated the abbey at the English town of Glastonbury (known today for its music festival) and brought a rock back from Jerusalem to Wales. David's miracles include using tears to bring a dead by back to life and restoring a blind man's sight. David lived for 100 years, dying on 1st March 589CE. It is tradition for a saint's feast day to fall on their death anniversary so St David's Day is celebrated in Wales on 1st March by wearing a daffodil or leek while children would sing Welsh folk songs, perform traditional Welsh dances and recite Welsh poems.