Christmas to March - The Black Death: "The pestilence gathered strength in Kilkenny during Lent ... there was scarcely a house in which only one died."[1]
3 February - Conall Ó Mórdha killed by his brothers. Succeeded as King of Laois by his son, Ruaidhrí.
May - The Black Plague ends after causing several thousand deaths.
17 June - Fulk de la Freigne killed by the Irish of Leinster
18 June - The Statute of labourers is passed at Westminster and will later be applied in Ireland.
17 July - Thomas de Rokeby appointed Justicier of Ireland; arrives 20 December. John de Carew acts as deputy Justicier.
Shortage of corn and spices, leading to prices of twenty pence for a pound of corn and forty pence for pepper and ginger.
Aedh Ó Ruairc defeats Flaithbertaigh Ó Ruairc and his allies, Donough Ó Domhnaill; Aedh Mag Fhlannchaidh, Chief of Dartry; Gilchreest Mag Fhlannchaidh; Loughlin mac Aindiles Ó Baoighill.
Flaithbheartach Domnall Carrach Ó Ruairc deposed from kingship of West Bréifne.
Sean Dubh MacDonnell was killed by Manus mac Eochaid Mac Mathghamhna
Warfare between Ruaidri mac Tairdelbach Ó Conchobair and Ferghal MacDermot; the former burns, wastes and plunders Moylurg.
Donough Reagh mac Melaghlin Carragh MacDermot seized by Cormac Bodhar Mac Dermot, who has him killed by the son of Gilchreest Mac Taichligh and The Ó Cearnaigh.
Gilbert Ó Flannagáin, Chief of Tuath Ratha, was slain by the sons of Brian Ó Flannagáin.
Murtough Riaganagh Mag Aenghusa killed by his brothers.
Cormac Ballach mac Art Ó Maoilsheachlainn and the Irish of Mide defeated by the Lord Justice and the English of Meath, "in which many of their chieftains were slain."
A raid by The Clanricarde into Lower Connacht is met and heavily defeated by Mac William Burk and Mac Feorais, resulting in his capture and the capture and death of many of his followers.
Births
Friar John, Minister of the Friar Preachers of Ireland (alive 1405).
^ Williams, Dr. Bernadette. (2007).The Annals of Ireland by Friar John Clyn. Dublin: Four Courts Press. ISBN 978-1-84682-034-2
"The Annals of Ireland by Friar John Clyn", edited and translated with an Introduction, by Bernadette Williams, Four Courts Press, 2007. ISBN 978-1-84682-034-2, pp. 240–244.
"A New History of Ireland VIII: A Chronology of Irish History to 1976", edited by T. W. Moody, F.X. Martin and F.J. Byrne. Oxford, 1982. ISBN 0-19-821744-7.