Analysis of information sources in references of the Wikipedia article "Ημέρα του Αγίου Πατρικίου" in Greek language version.
In nineteenth-century America it became a celebration of Irishness more than a religious occasion, though attending Mass continues as an essential part of the day.
The religious occasion did involve the wearing of shamrocks, an Irish symbol of the Holy Trinity, and the lifting of Lenten restrictions on drinking.
For most Irish-Americans, this holiday is partially religious but overwhelmingly festive. For most Irish people in Ireland the day has little to do with religion at all. St. Patrick's Day church services are followed by parades and parties, the latter being the best attended. The festivities are marked by Irish music, songs, and dances.
Like many other forms of carnival, St. Patrick's Day is a feast day, a break from Lent in which adherents are allowed to temporarily abandon rigorous fasting by indulging in the forbidden. Since alcohol is often proscribed during Lent the copious consumption of alcohol is seen as an integral part of St. Patrick's day.
The 40-day period (not counting Sundays) prior to Easter is known as Lent, a time of prayer and fasting. Pastors of Irish- American parishes often supplied "dispensations" for St. Patrick s Day, enabling parishioners to forego Lenten sacrifices in order to celebrate the feast of their patron saint.