Saint David's Day is the feast (celebration) day of Saint David. He is the patron saint of Wales. His feast day falls on the 1st of March each year. The day is celebrated by the people of Wales and people of Welsh background throughout the world. The first day of March was chosen in memory of the death of Saint David. It is believed that he died on that day in 589. The date was declared a national day of celebration within Wales in the 18th century.