St. Patricks Day, celebrated on 17 March, has grown from a religious observance in Ireland to a global festival. Honouring Irelands patron saint, the day is marked by parades, music, and cultural pride.

In one of the most bizarre St Patrick's Day celebrations from around the world, the Chicago River is dyed green to mark the occasion. Each year the Chicago Plumbers Union dumps a concoction into the waterway from a series of plumping pipes and spout pumps.