10 March – one of the first actions of the new Fianna Fáil government is the release of 23 political prisoners.
18 March – the new government suspends the Public Safety Act, lifting the prohibition on a number of organisations including the Irish Republican Army. As a reaction to renewed IRA activity, former National Army Commandant Ned Cronin founds the Army Comrades Association, known as the Blueshirts.[3]
31 March – Dublin Corporation is considering removing Nelson's Pillar from O'Connell Street, Dublin on the grounds that it is an obstruction to traffic.
19 May – the Constitution (Removal of Oath) Bill is passed in Dáil Éireann.
21 May – Amelia Earhart, the first woman to fly solo across the Atlantic, lands just outside Derry having taken 14 hours to cross the ocean.
9 June – Éamon de Valera and some members of his government leave for discussions with the British Government concerning the Ottawa Conference.
21 June – ocean liners carrying thousands of pilgrims from the United States, Lapland and the Netherlands arrive in Irish ports for the Eucharistic Congress.
22 June – the 31st International Eucharistic Congress opens in Dublin Pro-Cathedral, the greatest gathering of Church dignitaries that Ireland has ever seen. The "Blue Hussars", the ceremonial Mounted Escort of the Irish Army, make their first public appearance as a guard of honour for the Papal Legate, Cardinal Lauri.
23 June – 2,000 men attend mass at a High Altar in the Phoenix Park.
24 June – 200,000 women are addressed by the Archbishop of Edinburgh at mass in the Phoenix Park.
26 June – almost a million worshippers attend Pontifical Mass in the Phoenix Park in the final ceremony of the Eucharistic Congress.
26 September – Éamon de Valera gives his inaugural speech as President of the League of Nations. He criticises complacent resolutions where the demand is for effective action.