16 March – Éamon de Valera was greeted by Benito Mussolini in Rome and a luncheon was held in his honour.
22 March – Irish neutrality was discussed during a Dáil debate on defence estimates. The Government considered the implications for the export market to Britain if a neutral stand was taken.
30 March – The Treason Bill passed its fifth and final stage in Dáil Éireann.
9 April – The Gaelic Athletic Association voted to keep the name of the President, Douglas Hyde, off its list of patrons. The situation arose when Hyde attended an international soccer game.
19 April – In a speech to Seanad Éireann (the Senate) Taoiseach Éamon de Valera referred to the dropping of all references to the King and Great Britain from new Irish passports.
9 September – Billed as "The Last Race in Europe" until after World War II, the Irish Motor Racing Club held its Phoenix Park Race; this included motorcycle and car races.[8]
11 September – The Irish-flagged tanker Inverliffey was shelled and sunk by the Nazi submarine, U-38. The U-boat towed the lifeboats away from the blazing oil.
English-born Irish composer Elizabeth Maconchy returned to Ireland from England, living in Dublin for a brief period, during which she composed her Fifth String Quartet.[14]