16 January — Three lion cubs reared by an Irish red setter go on view at Dublin Zoo.
17 January — The different sections of the Nationalist Party meet in the Dublin Mansion House's Oak Room to promote national unity.
6 February — The Irish National League and Irish National Federation re-unite within the Irish Parliamentary Party, with John Redmond elected as compromise chairman.
28 February — Unofficial figures show that the Royal Dublin Fusiliers suffered the most in the Second Boer War.
12 March — The 45th Company of the Imperial Yeomanry leave Dublin for service in South Africa.
17 March — In celebration of Saint Patrick's Day, the Lord Lieutenant (Earl Cadogan), accompanied by his staff, reviews a military display in the yard of Dublin Castle, followed by dinner and a ball in Saint Patrick's Hall that evening.
1 April — The Irish Guards regiment of the British Army is formed by order of Queen Victoria to honour the Irish troops fighting in the Boer War for the British Empire.
4 April — Queen Victoria arrives at Kingstown and travels to Dublin where she is greeted by the Lord Mayor and members of the Corporation.
7 April — 52,000 children greet Queen Victoria at the Phoenix Park in Dublin.
23 April — At a meeting in Loughrea, Douglas Hyde complains of the rapid Anglicisation of the country and the loss of the Irish language.
11 May — Edward Carson becomes Solicitor General for England and Wales and is knighted.
13 May — The rift in the Irish Parliamentary Party is healed as John Dillon and John Redmond share a platform for the first time in ten years.
5 July — The British War Office issues a list of Irish prisoners of the Boers from the 1st Battalion Royal Irish Fusiliers. It names 473 men from eight companies.
30 November — Oscar Wilde, dramatist and wit, dies in poverty in Paris aged 46.
31 December — Ceremonies all over the country mark the closing of the 19th century and the dawning of the 20th.
Richard J. Ussher and Robert Warren publish The Birds of Ireland (in London).
The Irish Literary Theatre stages three plays at the Gaiety Theatre, Dublin with an English company: Edward Martyn's Maeve; Alice Milligan's The Last Feast of the Fianna; and George Moore's satirical The Bending of the Bough: a comedy in five acts (an adaptation of his cousin Martyn's The Tale of a Town).
'Moira O'Neill' publishes Songs of the Glens of Antrim.
Derry Celtic is founded and joins the Irish Football League.
10 January — Harry Kernoff, artist (died 1974).
19 January — Frank Devlin, badminton player (died 1988).
January — Michael Donnellan, founder of Clann na Talmhan and TD (died 1964).
22 February — Seán Ó Faoláin, short story writer (died 1991).
27 February — James Ennis, cricketer (died 1976).
6 March — Mark Deering, Fine Gael TD (died 1972).
25 May — John Hunt, expert on mediaeval art (died 1976).
10 July — Paul Vincent Carroll, dramatist (died 1968).
17 July — Paddy Smith, Fianna Fáil TD and longest-serving member of Dáil Éireann (54 years) (died 1982).
22 July — Michael Davern, Fianna Fáil TD for Tipperary South 1948–1965 (died 1973).
2 October — Hubert Butler, writer and historian (died 1991).
18 October — Sarah Makem, traditional singer (died 1983).
23 October — Paddy Ahern, Cork hurler (died 1971).
19 November — Pamela Hinkson, writer (died 1982).
4 December — Tom Farquharson, soccer player (died 1970).
23 December — Noel Purcell, actor (died 1985).
John Stewart Collis, writer and pioneer ecologist (died 1984) and his twin Robert Collis, physician and writer (died 1975).
Eudie Coughlan, Cork hurler (died 1987).
Peter Kerley, radiologist (died 1978).
Seosamh Mac Grianna, writer (died 1990).
William Norton, Labour Party (Ireland) leader, TD and Cabinet Minister (died 1963).
Nano Reid, painter (died 1981).
Frank Ryan, tenor (died 1965).
19 January — William Larminie, poet and folklorist (born 1849).
23 January — Abraham Boulger, soldier, recipient of the Victoria Cross for gallantry in 1857 at Lucknow, India (born 1835).
23 January — James Pearson, soldier, recipient of the Victoria Cross for gallantry in 1858 at Jhansi, India (born 1822).
16 March — Frederick William Burton, painter (born 1816).
22 March — Thomas Murphy, recipient of the Victoria Cross for bravery at sea in saving life in a storm off the Andaman Islands in 1867 (born 1839).
26 April — John Hawkins Hagarty, lawyer, teacher and judge in Canada (born 1816).
2 July — Thomas Farrell, sculptor (born 1827).
12 November — Marcus Daly, businessman in America (born 1841).
30 November — Oscar Wilde, playwright, novelist, poet (born 1854).
14 December — Paddy Ryan, boxer (born 1851).
Thomas Preston, scientist (born 1860).
Thomas Workman, entomologist and arachnologist (born 1844).
1900 in Ireland Wikipedia
Events from the year 1900 in Ireland.