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101 Least Lucky St. Patrick's Day ToastsThe Shamrock
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St. Pat's Day irish jokes
One traditional icon of the day is the shamrock. And this stems from an Irish tale that tells how Patrick used the three-leafed shamrock to explain the Trinity. He used it in his sermons to represent how the Father, the Son, and the Holy Spirit could all exist as separate elements of the same entity. His followers adopted the custom of wearing a shamrock on his feast day.