Happy St. Patrick's Day!

Revelers attend the Saint Patrick's Day parade on March 17, 2019 in Dublin, Ireland.

Members of the Artane Band take part in the annual Saint Patrick's Day parade on March 17, 2019 in Dublin, Ireland.

Festival participants take part in the annual Saint Patrick's Day parade on March 17, 2019 in Dublin, Ireland.

Britain's Prince William, Duke of Cambridge and Britain's Catherine, Duchess of Cambridge enjoy a pint of Guinness with officers and guardsmen of the 1st Battalion Irish Guards after the St Patrick's Day parade, at Cavalry Barracks in Hounslow, west London, on March 17, 2019.

Festival participants make final preparations before taking part in the annual Saint Patrick's Day parade on March 17, 2019 in Dublin, Ireland.

New York Yankees outfielder Matt Lipka wears St. Patrick's Day socks before the start of the spring training game against the Philadelphia Phillies at Spectrum Field in Clearwater, Fla.

Festival participants take part in the annual Saint Patrick's Day parade on March 17, 2019 in Dublin, Ireland.

President Donald J. Trump and First Lady Melania Trump are greeted by Reverend W. Bruce McPherson as they attend services at St. John's Episcopal Church in Washington, DC on St. Patrick's Day.

Anika Wagner, a dancer with the Clark Academy School of Dance, performs on a float with her group in the 50th Annual St. Patrick's Day Parade, Saturday, March 16, 2019, in downtown St. Louis.

Democratic presidential candidate Beto O'Rourke holds up a gift from County Recorder John Murphy and his family during a packed St. Patrick's Day party at his home March 16, 2019 in Dubuque, Iowa.

Tom Menton of Yorktown, N.Y. with a beard dyed appropriately for the occasion, was among the hundreds of thousands that lined Fifth Ave. in Manhattan for the 258th annual St. Patrick's Day Parade on March 16, 2019.

Aidan Alnwick, a bagpiper in the Iona College Pipe Band marches in the 258th annual St. Patrick's Day Parade on March 16, 2019. Hundreds of thousands of people lined Fifth Ave. as the parade made its way from 44th St. up to 79th St.

A group of women from Dublin, Ireland were among the many visitors from Ireland attending the 258th annual St. Patrick's Day Parade in New York City on March 16, 2019.

Thousands marched in the 258th annual St. Patrick's Day Parade in New York City on March 16, 2019.

The City of New York Police Department Emerald Society Pipes and Drums march in the 258th annual St. Patrick's Day Parade in New York City on March 16, 2019.

The City of New York Police Department Emerald Society Pipes and Drums march in the 258th annual St. Patrick's Day Parade in New York City on March 16, 2019. Hundreds of thousands of people lined Fifth Ave. as the parade made its way from 44th St. up to 79th St.

New York City Mayor Bill De Blasio and police commissioner James P. O'Neill march in the 258th annual St. Patrick's Day Parade on March 16, 2019.

A man balances his hat during the annual New York City St. Patrick's Day Parade on March 16, 2019. The New York City St. Patrick's Day parade, dating back to 1762, is the world's largest St. Patrick's Day celebration.

People gather on the banks of the Vilnia river, which has been coloured in green to mark Saint Patrick's Day, on March 16, 2019 in Vilnius, Lithuania. St Patricks Day occurs annually worldwide in observance of the death of St. Patrick, the patron saint of Ireland.

Lynn Knute, second from right, of Green Bay, Wis. watches as bagpipers march up Fifth Avenue during the St. Patrick's Day Parade, Saturday, March 16, 2019, in New York.

A Yonkers Fire Pipe and Drum drummer reacts to being kissed by Kayla DeJesus, right, while he marches in the 195-year-old Savannah St. Patrick's Day parade, Saturday, March 16, 2019, in Savannah, Ga.

Members of the Georgia Southern University Army ROTC Eagle Battalion marches in the 195-year-old Savannah St. Patrick's Day parade, Saturday, March 16, 2019, in Savannah, Ga.

An Irish dance group rehearses ahead of participating in the St. Patrick's Day Parade, Saturday, March 16, 2019, in New York.

Members of a band line up before marching up Fifth Avenue during the St. Patrick's Day Parade, Saturday, March 16, 2019, in New York.

Kayakers make their way up the Chicago River after the river was dyed green in celebration of St. Patrick's Day.

Kayakers make their way up the Chicago River after the river was dyed green in celebration of St. Patrick's Day.

Revelers prepare for the 195-year-old St. Patrick's Day parade on one of the city's historic squares, Saturday, March 16, 2019, in Savannah, Ga.

Joey Homans holds his 3-month-old granddaughter Caroline Homans in one hand and a beer in the other before the start of the Savannah St. Patrick's Day parade, Saturday, March 16, 2019, in Savannah, Ga. Started by Irish immigrants to Georgia’s oldest city 195 years ago, the March parade has ballooned into a sprawling street party that’s the No. 1 tourist draw for Savannah.

Toronto Maple Leafs right wing Mitchell Marner skates wearing a throwback St. Pats jersey in recognition of St. Patrick's Day before playing against the Philadelphia Flyers at Scotiabank Arena in Toronto.