St Patrick`s Day in Ireland

Saint Patrick`s Day celebrates Saint Patrick and people celebrate it on 17th of March. It is a national holiday in Ireland but it is also celebrated in Canada, United Kingdom, Australia, United States, New Zealand and other countries. St. Patrick's Day is a holy day of obligation for catholics in Ireland. It is a first class feast in Ireland.
Saint Patrick was living in c. 387-493. He was a Roman-Briton and Christian missionary who is the most well-known patron saint of Ireland.
When he was about 14 he was captured from Britain by Irish raiders and taken as a slave to Ireland. He lived there for six years before escaping to his family. After entering the Church, he returned to Ireland as an bishop in the north and west of the island. Little is known about the places where he worked.
By the eighth century he had come to be revered as the patron saint of Ireland.
Legend tells that Patrick was teaching the Irish about the concept of the Trinity by showing people the shamrock (3-leaved clover) using it to highlight the Christian belief of three divine persons in one God.
St Patrick`s Day colour is green. The color green - because it is the color of spring, Ireland, and the shamrock.
For the St Patrick`s Day the Chicago River is dyed green in every year.

http://en.wikipedia.org/wiki/Saint_Patrick's_Day ; http://en.wikipedia.org/wiki/Saint_Patrick