Today’s saint is another one who made a significant impact in Ireland. Our saint is Saint Declan of Ardmore:
Declán of Ardmore (Irish: Declán mac Eircc, Latin: Declanus, died 5th century), also called Déclán or Declan, was an early Irish saint of the Déisi Muman, who was remembered for having converted the Déisi in the late 5th century and for having founded the monastery of Ardmore (Ard Mór) in what is now Co. Waterford. The principal source for his life and cult is a Latin Life of the 12th century. Like Ailbe of Emly, Ciarán of Saigir and Abbán of Moyarney, Declán is presented as a Munster saint who preceded Saint Patrick in bringing Christianity to Ireland. He was regarded as a patron saint of the Déisi of East Munster.
More can be found out about him at his wiki, found here.