30 April – cheering crowds in New York greet the crew of the Bremen after it has made its transatlantic flight.
19 May – the foundation stone of the new Northern Ireland Parliament Building is laid at Stormont.
29 May – it is suggested that the old Irish flag – that of a gold harp with a blue background – should be carried at the Olympic Games in Amsterdam. However, the Irish tricolour has already been registered as the national flag.
14 June – amendments to the Court of Justice bill state that certain judges cannot be appointed if they do not have a competent knowledge of the Irish language.
30 July – the Irish Tricolour is raised for the first time at the Olympic Games when Dr. Pat O'Callaghan wins a gold medal for hammer throwing.
27 August – fifteen countries, including Ireland, sign the Kellog Peace Pact in Paris. The Irish Tricolour flies at the Quai d'Orsay amongst the flags of 50 other nations.
14 October – The Gate Theatre in Dublin is founded by English actors and lovers Micheál Mac Liammóir and Hilton Edwards, initially using the Abbey Theatre's Peacock studio theatre space to stage works by European and American dramatists.
25 February – William O'Brien, nationalist, journalist, agrarian agitator, social revolutionary, politician, party leader, newspaper publisher and author (born 1852).