This photograph of President Ronald Reagan and Taoiseach Garret Fitzgerald of Ireland was taken by Bill Fitz-Patrick on March 17, 1986. During a ceremony in the Rose Garden, Taoiseach Fitzgerald, also known as a prime minister, presented a Waterford Crystal bowl of shamrocks to President Reagan. Secretary of State George P. Shultz is also pictured.

This White House photograph of President Barack Obama at the Dubliner Irish pub in Washington, D.C. was taken by Pete Souza on March 17, 2012. President Obama visited the Dubliner on St. Patrick's Day with his Irish cousin, Henry Healy (center), and Ollie Hayes, a pub owner from Moneygall, Ireland (right).

This White House photograph of President Barack Obama and Vice President Joseph R. Biden outside the Oval Office was taken by Pete Souza on March 17, 2015. President Obama and Vice President Biden are pictured in festive ties walking to the motorcade on the South Grounds of the White House for departure to the U.S. Capitol in Washington, D.C. for a St. Patrick's Day luncheon.

This White House photograph of President Barack Obama and Taoiseach Brian Cowen of Ireland was taken by Lawrence Jackson on March 17, 2009. President Obama and Taoiseach Cowen, also known as a prime minister, are pictured holding a shamrock ceremony in the Roosevelt Room of the White House.

This photograph of President Ronald Reagan at the Ireland's Own restaurant in Alexandria, Virginia was taken by Susan Biddle on March 17, 1988. President Reagan is pictured celebrating St. Patrick's Day with the restaurant's owner, Pat Troy.

This photograph of President Ronald Reagan delivering a toast at a St. Patrick's Day luncheon at the United States Capitol was taken by Michael Evans on March 17, 1988. Also pictured are Representative Jim Wright, diplomat Padraic MacKernan, and Senator Edward M. Kennedy.

This photograph of President Ronald Reagan was taken by Pete Souza on March 17, 1988. President Reagan is pictured walking back to the Oval Office on the South Grounds in festive attire following a St. Patrick's Day luncheon at the United States Capitol.

This White House photograph of President John F. Kennedy meeting with Ambassador Thomas J. Kiernan of Ireland was taken by Cecil Stoughton on March 17, 1961 in the Oval Office. Ambassador Kiernan presented President Kennedy with an arrangement of shamrocks and a scroll displaying the Kennedy family coat of arms and signed by the chief herald of Ireland, Gerard Slevin.

This White House photograph of President Barack Obama delivering a toast during a St. Patrick's Day luncheon at the United States Capitol was taken by Pete Souza on March 17, 2015. President Obama is pictured alongside Taoiseach Enda Kenny of Ireland, also known as the prime minister.

This close-up photograph of the scroll presented to President John F. Kennedy by Ambassador Thomas J. Kiernan of Ireland was taken by Cecil Stoughton on March 17, 1961. The scroll was signed by the chief herald of Ireland and features the Kennedy family coat of arms. Ambassador Kiernan presented the scroll and an arrangement of shamrocks to President Kennedy in the Oval Office of the White House that St. Patrick's Day.

This White House photograph of President Barack Obama at the Dubliner, an Irish pub in Washington, D.C., was taken by Pete Souza on March 17, 2012. President Obama is shown greeting the crowds on St. Patrick's Day.

In this photograph by Pete Souza, President Barack Obama has lunch with Speaker of the House Nancy Pelosi and Taoiseach Brian Cowen of Ireland on March 17, 2009. President Obama and Cowen, the prime minister of Ireland, attended a St. Patrick's Day lunch hosted by Speaker Pelosi in the Rayburn House Office Building of the United States Capitol complex.

In this photograph by Sharon Farmer, President Bill Clinton accepts a gift from Taoiseach Albert Reynolds of Ireland on March 17, 1994. The gift, a crystal bowl of shamrocks, was exchanged in the Roosevelt Room in the West Wing in honor of St. Patrick's Day. Reynolds served as taoiseach, or prime minister, from 1992 through 1994.

In this photograph by Lawrence Jackson, President Barack Obama departs the United States Capitol on March 17, 2015. President Obama attended a St. Patrick's Day lunch at the Capitol alongside Taoiseach Enda Kenny of Ireland, right. Accompanying Obama and Kenny were Representative Peter King, left, and Speaker of the House John Boehner, second from the left. Kenny served as taoiseach, or prime minister, from 2011 to 2017.

In this photograph by Ralph Alswang, President Bill Clinton accepts a gift from Taoiseach John Bruton of Ireland on March 17, 1995. The gift, a crystal bowl of shamrocks, was exchanged in the Roosevelt Room in the West Wing in honor of St. Patrick's Day. Bruton served as taoiseach, or prime minister, from 1994 to 1997.

In this photograph by Pete Souza, President Barack Obama and First Lady Michelle Obama speak with Taoiseach Enda Kenny of Ireland and his wife, Fionnuala Kenny, on March 17, 2011. President and Mrs. Obama welcomed the Kennys in the Green Room of the White House prior to a St. Patrick's Day reception. Kenny was taoiseach, or prime minister, from 2011 to 2017.

In this photograph, First Lady Barbara Bush accepts a gift on March 17, 1992. The gift, a crystal bowl of shamrocks, was in honor of St. Patrick's Day and took place in the Rose Garden on the South Grounds of the White House.

In this photograph by Jack Kightlinger, First Lady Pat Nixon celebrates her birthday on board Air Force One on March 16, 1974 en route to South America. Also on board were staff members, including Col. Jack Brennan. Born Thelma Catherine Ryan, Mrs. Nixon was nicknamed "St. Patrick's Day Babe" by her father due to being born the day before St. Patrick's Day. The shortened version, Pat, stuck with Mrs. Nixon the rest of her life.

In this photograph by Mary Anne Fackelman, President Jimmy Carter, First Lady Rosalynn Carter, and their daughter, Amy, welcome the Saffron United Pipe Band on March 16, 1980. Recognizable for their orange-hued kilts, the Irish pipe band was based in Babylon, New York and came to the North Portico of the White House to serenade the Carter family ahead of St. Patrick's Day.

In this photograph by Bill Fitz-Patrick, President Ronald Reagan is greeted by a group dressed in honor of St. Patrick's Day on March 17, 1986. The celebration took place in the Cabinet Room in the West Wing. The group interrupted President Reagan's Issues Briefing Luncheon.

This photograph is of President Reagan sharing a laugh with his assistant and director of the White House Military Office, Edward Hickey, at a St. Patrick's Day party in the White House Military Office. The White House Military Office (WHMO) provides military support for White House functions, including food service, presidential transportation, medical support and emergency medical services, and hospitality services.

In this photograph, President Ronald Reagan attends a luncheon in honor of St. Patrick's Day hosted by Speaker of the House Tip O'Neill at the United States Capitol. Also pictured are House Minority Leader Robert H. Michel and Representative Edward P. Boland. Michael Evans photographed this lunch on March 17, 1983.

In this photograph by Michael Evans, President Ronald Reagan and First Lady Nancy Reagan speak with Taoiseach Charles Haughey of Ireland on March 17, 1982. President and Mrs. Reagan welcomed Haughey in the Red Room of the White House on St. Patrick's Day. Haughey served as taoiseach, or prime minister, three times.

This photograph of Vera Cosgrave, First Lady Betty Ford, chief of protocol Henry Catto, Minister of Foreign Affairs Garret FitzGerald of Ireland, and Secretary of State Henry Kissinger in the Yellow Oval Room was taken by Ricardo Thomas on March 17, 1976. The group was gathered in the Yellow Oval Room, located on the Second Floor of the White House, ahead of a State Dinner held in honor of Taoiseach Liam Cosgrave of Ireland. The dinner for the taoiseach, or prime minister, was held on St. Patrick's Day.

In this photograph taken by Cecil Stoughton, Ambassador William P. Fay of Ireland presents President Lyndon B. Johnson with an engraved Waterford Crystal bowl filled with shamrocks on March 17, 1965 in the Oval Office. The gift was from the President Eamon de Valera of Ireland on St. Patrick's Day.