4 July – TheDáil debated the Fethard-on-SeaNe Temere boycott.
22 July – The Gough Monument in thePhoenix Park inDublin was wrecked by an explosion so violent that it was heard all over the city.
7 August – A 20-foot high war memorial inLimerick was blown up. It was erected to commemorate British soldiers from Limerick who died inWorld War I.
30 September – Last day of operation of 97 miles (155 km) of railway in Northern Ireland (Great Northern Railway (GNR) branches and the entireSligo, Leitrim and Northern Counties Railway) following government instructions.County Fermanagh lost all its lines. The GNR closed a further 84 miles (134 km) of connecting lines in the Republic on October 12.
10 October – TheWindscale fire began with a fire in a graphite core of areactor at theWindscale Nuclear Power station and reprocessing centre on theCumberland coast ofNorth West England. Years later there were claims that the radiation caused cancers and birth defects inCounty Louth.
27 October – The foundation stone ofGalway Cathedral was blessed.
1 November – TheSoviet satelliteSputnik was visible over Dublin for the second time in a month.
November –Border Campaign: The premature explosion of a bomb at a farmhouse in County Louth killed four IRA men and a householder.[1]
12 May – ThePike Theatre in Dublin staged theTennessee Williams playThe Rose Tattoo. During its short run the theatre was invaded byGardaí (police) and director Alan Simpson was arrested for producing "a lewd entertainment" for a mime of dropping a condom onto the floor.[7]
The Bachelors musical group formed as The Harmonichords in Dublin.