St. Patrick (c.387 to March 17, 461)

When I was a child, I always knew my birth month had arrived, when I turned the calendar page to find leprechauns, shamrocks, and all things Emerald Isle. And, it didn't matter that I wasn't Irish. I was Roman Catholic and could celebrate St. Patrick, too!
He was born c.387 in Bonaven Taberniae, Kilpatrick, Scotland to parents Calpurnus and Conchessa who were Romans.
At age 16, St. Patrick was seized from his father's farm by Irish raiders who sold him into pagan slavery in Ireland. He lived there until he was 22 then escaped and returned to his family. St. Patrick went back to Ireland after he was an ordained bishop.
Legend says that he banished the snakes from Ireland and taught the Irish about the Trinity using a shamrock. He is one of the most beloved saints of all time.
St. Patrick died at Saul on Strangford Lough on March 17, 461. It is thought that he was buried at Down Cathedral in Downpatrick along with St. Brigid and St. Columba. The trio are the patron saints of Ireland.
His feast day, as we all know, is March 17.

St. Mel of Ardagh (? to c.488)

With St. Valentine's Day just around the corner, solo ladies listen up. St. Mel of Ardagh might just be your man. He is fast becoming a patron saint of singles, joining the ranks with Saints Benedict Joseph Labre, Agatha, and Raphael.
St. Mel, the nephew of St. Patrick, went with his uncle to Ireland and worked alongside him until he became Bishop of Ardagh. He helped evangelize Ireland and professed St. Brigid as a nun.
For a while, St. Mel lived with his Aunt Lupait which caused tongues to wag with scandalous accusations. Because of this, St. Patrick took it upon himself to investigate the situation. By miraculous means, St. Mel was plowing a field and managed to scoop up a live fish as though it were in the water and Aunt Lupait carried fiery coals without burning herself, they were cleared of any charges. Still, St. Patrick ordered that they live apart to avoid further scandal.
St. Mel died around 488 AD.