Saint Patrick's Day!!!

Saint Patrick is Ireland saint and this day is celebrated on Catholic Church, the Anglican Communion, the Eastern Orthodox Church and Lutheran Church. That day is a religion holiday in the Republic of Ireland, Northern Ireland, Newfoundland and Labrador, Montserrat, Great Britain, Canada, the United States, Argentina, Australia, New Zealand and others. This celebrated is on 17 March and the mains features are shamrock, attire greens, alcoholic beverage  and church services.
In Chicago, every year on Saint Patrick's Day some boats put a green paint in a river. During some hours, the river becomes green. Since 1961 the river is painted on SPD and the organizers say there isn't any environment problem.
Saint Patricks used shamrock to explain how Holy Trinity could gather three god to only one god.
The first picture is Saint Patrick's bracelet.