Over 33 million Irish-Americans are set to be involved in the festivities . Chicago River was dyed green for the 32nd time this year . St. Patrick 's Day will see $ 4.6 billion in sales . Reports suggest four tours of Guinness will be drunk globally .
Over 33 million Irish-Americans are set to be involved in the festivities . Chicago River was dyed green for the 32nd time this year . St. Patrick 's Day will see $ 4.6 billion in sales . Reports suggest around 13 million pints of Guinness will be drunk globally .