Most of Ireland's past is known only to the year. These are the 75 days whose exact date is recorded, set out through the calendar.
Feast days: 15 Jan, St Íte
Feast days: 1 Feb, St Brigid of Kildare
Feast days: 8 Mar, St Senan · 17 Mar, St Patrick · 21 Mar, St Enda of Aran
Feast days: 16 May, St Brendan the Navigator · 30 May, St Dymphna
Feast days: 3 Jun, St Kevin of Glendalough · 6 Jun, St Jarlath · 9 Jun, St Colmcille
Feast days: 1 Jul, St Oliver Plunkett · 6 Jul, St Moninne · 8 Jul, St Killian · 24 Jul, St Declan of Ardmore
Feast days: 11 Aug, St Attracta · 30 Aug, St Fiachra · 31 Aug, St Aidan of Lindisfarne
Feast days: 9 Sep, St Ciarán of Clonmacnoise · 25 Sep, St Finbarr of Cork
Feast days: 11 Oct, St Canice · 16 Oct, St Gall · 27 Oct, St Otteran
Feast days: 3 Nov, St Malachy · 14 Nov, St Laurence O'Toole · 23 Nov, St Columbanus · 24 Nov, St Colman of Cloyne
Each date is the one Wikidata records for the event's Wikipedia article, taken only where it is given to the day. Ireland used the Julian calendar until 1752, and Wikidata usually gives the Gregorian date, so older events can appear ten or eleven days later than the date traditionally quoted: the Boyne, fought on 1 July Old Style, falls here on 11 July. Where that matters, the entry says so.
Want the years as well as the days? The full timeline has every event, dated or not.