Ireland

The Dublin brigade of the IRA attacks and sets fire to the Customs House; 120 of its men are captured and 11 are killed

1st parliament for Northern Ireland is elected

IRA troops under Tom Maguire fight off 600 English troops in Tourmakeady, Co. Mayo

Lord FitzAlan of Derwent becomes the first Catholic lord lieutenant

Tom Barry and the West Cork Flying Column routs a superior force from the Essex Regiment at Crossbarry

The Crossbarry ambush or Battle of Crossbarry occurred on 19 March 1921 and was one of the largest engagements of the Irish War of Independence.

First women jurors in Glasgow Sheriff Court.

The Sex Disqualification (Removal) Act 1919 was an Act of Parliament in the United Kingdom. It became law when it received royal assent on 23 December 1919.

Sir James Comyn, lawyer, is born in Dublin

Sir James Peter Comyn (8 March 1921 – 5 January 1997) was an Irish-born barrister and English High Court judge. The scion of a prominent Nationalist legal family, Comyn was sent to England after they fell out with Éamon de Valera. Considered by many to be “the finest all-round advocate at the English bar”, Comyn was appointed to the High Court of Justice in 1978, serving on the bench until his retirement in 1985.

Limerick Mayor George Clancy is shot and killed in his home by disguised members of the Black and Tans

George Clancy (18 March 1881 – 7 March 1921; also known as Seoirse Mac Fhlannchadha), was an Irish nationalist politician and Mayor of Limerick.

Cecil King, painter, is born in Rathdrum, Co. Wicklow

Patrick Scott, artist, is born in Kilbrittain, Co. Cork

Patrick Scott (24 January 1921 – 14 February 2014) was an Irish artist.