2015 St. Patrick's Day celebrations (24 images)

A child holds a photo of his father while marching on the parade route at the St. Patrick's Day Parade on Fifth Avenue in New York City on March 17, 2015. The St. Patrick's Day parade marches up Fifth Avenue today with an openly gay group in its ranks for the first time. Photo by John Angelillo/UPI

A paradegoer wears a costume while watching the St. Patricks Day parade in downtown St. Louis on March 14, 2015. Photo by Bill Greenblatt/UPI

A parade group march behind the banner OUT@NBCUniversal at the St. Patrick's Day Parade on Fifth Avenue in New York City on March 17, 2015. For the first time in the parades 254 year history a gay and lesbian (LGBT) group is among the participants. The group making history is an alliance of LGBT employees of NBC Universal which is a corporate sponsor of the parade. Photo by John Angelillo/UPI

A parade group march behind the banner OUT@NBCUniversal at the St. Patrick's Day Parade on Fifth Avenue in New York City on March 17, 2015. For the first time in the parades 254 year history a gay and lesbian (LGBT) group is among the participants. The group making history is an alliance of LGBT employees of NBC Universal which is a corporate sponsor of the parade. Photo by John Angelillo/UPI