<!-- "none" is preferred when the title is sufficiently descriptive -->
Events in the year 1912 in Ireland.
Events
February
- 8 February – The First Lord of the Admiralty Winston Churchill addressed a pro-Home Rule meeting in Belfast despite Ulster Unionist attempts to prevent him speaking. He shared the platform with John Redmond, the leader of the Irish Parliamentary Party.
March
- 31 March – John Redmond, Eoin MacNeill, Patrick Pearse, Tim Healy and others addressed a monster meeting of 200,000 people in favour of Home Rule at the General Post Office, Dublin.
April
- 9 April – 250,000 Orangemen converged on Balmoral Showground in Belfast, declaring that under no circumstances would they accept Home Rule.
- 11 April – The prime minister of the United Kingdom H. H. Asquith introduced the Third Home Rule Bill in the House of Commons of the United Kingdom.
- 12 April – A convention of Sinn Féin delegates led by Arthur Griffith opposed the Home Rule Bill.
- 14 April – The , the largest vessel in the world, built in Belfast and making her last call at Queenstown, collided with an iceberg and sank.
- 22 April – Englishman Denys Corbett Wilson flying a Blériot XI monoplane completed the first aeroplane crossing of the Irish Sea, flying westbound from Goodwick in southwest Wales to Enniscorthy in southeast Ireland. The flight took 100 minutes.
- 26 April – Welsh aviator Vivian Hewitt made a westbound aeroplane crossing of the Irish Sea in 90 minutes from Holyhead in northwest Wales to Phoenix Park in Dublin.
- 18 July – Suffragettes attempted an arson attack on the Theatre Royal, Dublin, during Asquith's visit.
- 27 July – the Blenheim Unionist rally: Bonar Law, leader of the British Conservative Party in opposition, made a defiant speech at a massive Unionist rally at Blenheim Palace against Home Rule, implying support for armed resistance to it in Ulster.
September
- 28 September – 'Ulster Day' – the Ulster Covenant to resist Home Rule was signed by almost 250,000 men throughout Ulster; 229,000 women signed a parallel declaration.
October
- 23 October – Large numbers of cattle were slaughtered in Mullingar due to the outbreak of foot and mouth disease in the area.
Undated
- The golden eagle became extinct in Ireland (prior to reintroduction).
Arts and literature
- 11 April – Lennox Robinson's play Patriots was first performed, at the Abbey Theatre in Dublin.
- 20 April – Bram Stoker, author of Dracula and theatrical manager, died in London.
- November – Lord Dunsany's short story collection The Book of Wonder was published.
Undated
- Peadar Kearney and Patrick Heeney's A Soldier's Song (which later became Amhrán na bhFiann, the Irish national anthem) was first published in Irish Freedom by Bulmer Hobson.
- Eleanor Hull published The Poem-Book of the Gael: translations from Irish Gaelic poetry into English prose and verse and first versified the traditional Irish hymn Be Thou My Vision in English.
- Forrest Reid's coming-of-age novel Following Darkness was published.
- James Stephens' novel The Crock of Gold was published.
- The popular song "When Irish Eyes Are Smiling" was written and published in the United States for the show The Isle O' Dreams.
Sport
Association football
<!--These are description lists; please see Help:List before changing-->
- ; International
- : 10 February – Ireland 1–6 England (in Dublin).
- : 6 March – Ireland 1–4 Scotland (in Belfast)–
