St. Patrick’s Day celebration has a lot of history that starts in the fifth century after Christ, when St. Patrick lived. The feast day is celebrated by the Catholics, the Anglicans, Eastern Orthodox and the Lutheran churches. The symbol of the shamrock was used by the saint to explain the concept of the Holy Trinity to the pagans. This day relation to drinking comes from the historical lifting of Lent restrictions for the celebration.
I wish you a happy and safe St. Patrick’s Day!
Picture by Andreas F. Borchert [CC BY-SA 3.0 de, CC BY-SA 4.0-3.0-2.5-2.0-1.0 or GFDL], via Wikimedia Commons