Lá Fhéile Pádraig Sona Duit.

Though I'm partial to Druids and suspicious of foreign Christians (even kidnapped Welshmen) who change things, St. Patrick was some Welshman. Thanks to Rev. Sandi for providing this:
From 365 Saints by Woodeene Koenig-Bricker:
Today, everyone, no matter what their heritage, can be a little Irish. For someone whose life contains as much fiction as fact, St. Patrick is arguably one of the most famous saints of all times. Although he is probably best known for shamrocks (and green beer), he is also believed to have written the hauntingly beautiful prayer entitled “The Breastplate of St. Patrick.” Containing the request “Christ shield me this day: Christ be with me, Christ before me, Christ behind me, Christ in me, Christ beneath me,” the prayer goes on to say, “Christ in quiet and in danger, Christ in hearts of all that love me, Christ in mouth of friend and stranger.”
Altho’ we can’t be absolutely certain Patrick is the author, this ancient prayer is a perfect reflection of his life and beliefs. Like all the saints, Patrick centered his life in Christ. Everything he did was done out of a passionate belief in the message of Jesus Christ. In a time when few people could read and write, Patrick’s life became a living gospel.
Likewise, our lives reflect the gospel we espouse. If we adhere to the gospel of materialism and consumerism, our actions will demonstrate our conviction. If we follow the gospel of self-interest, it will be apparent to all we meet. If like St. Patrick, however, we embrace the true gospel, which calls for selflessness and sacrifice, we become messengers of life and hope for a fallen world.
When people meet me, what message do I convey? Do I reflect my beliefs in both
word and deed?
And I would add, am I mindful of the message my life conveys?
I think St. Patrick would also want to honor Rosin The Bow & that cruel remorseless old foe on his day.

To mark St Patrick's Day, Faith Central has compiled 10 celebratory tidbits, some myth, some fact, on the Patron Saint of the Irish.
1. The potato crop was traditionally planted in Ireland after March 17
2. Blue not green is the color originally associated with St Patrick. "St Patrick's Blue" is used on Ireland's Presidential Standard or flag, while the Irish Guards sport a plume of St Patrick's blue in their bearskins. The emphasis on green is thought to be linked to "wearing the Green", a symbol from the 18th century on, of sympathy with Irish independence.
3. St Patrick is patron of fishermen in the Loire, where a legend associates him with a blackthorn bush. The saint is said to have slept beneath it, and when he awoke the next day, Christmas, the bush flowered, and was said to have continued to do so every Christmas until its destruction during the First World War.
4. A regiment of the Mexican army in the 1846 -8 War between Mexico and America was named after St Patrick. Members of the Batellón de San Patricio included Afro-Americans freshly liberated from the slave plantations of the South, and the soldiers were granted Mexican citizenship afterwards.
5. The first St Patrick's Day parade took place in 1737 in Boston, followed in 1762 by New York. George Washington allowed his soldiers a holiday on March 17, 1780 as "an act of solidarity with the Irish in their fight for independence."
6. Until the 1970's, all pubs were shut in Ireland on St Patrick's Day, and the sole venue selling drink the annual dog show. Lenten fasting - and the obligation to abstain from meat - were lifted on the day, which most families would begin with Mass.
7. St Patrick's Day is a public holiday in Ireland and also in Monserrat "the Emerald Isle of the Carribean," so called because it was settled in 1633 by Irish migrants from St Kitts.
8. According to legend, on the day of Judgement, while Christ judges all other nations, St Patrick will be the judge of the Irish.
9. Since 1962, tons of green dye are tipped on St Patrick's Day into the Chicago river, although the quantity has reduced, for environmental reasons, from 100 to 40.
10. Should you wish to carry on celebrating St Patrick after March 17, in the United States, you might visit the four Shamrocks in the USA including Mount Gay-Shamrock, W.Va or the nine cities named Dublin, including Dublin, Ohio (the largest Dublin in the U.S.) and Dublin, Georgia.

From St. Patrick's Day: Facts and Legends
See also, 10 Things You Didn't Know About Ireland- "More Guinness Is Sold in Nigeria Than in Ireland . . .Ireland is the third largest market for Guinness. Nigeria is at second, and the U.K. is the first."