Saint Patrick’s Day, colloquially St. Paddy’s Day or simply Paddy’s Day, is an annual feast day which celebrates Saint Patrick, the most commonly recognised of the patron saints of Ireland.
Saint Patrick’s Day is celebrated worldwide by those of Irish descent and increasingly by people of other ethnicities as well, notably in Argentina, Australia, New Zealand and North America.
Celebrations are generally themed around all things Irish and, by association, the colour green. Both Christians and non-Christians celebrate the secular version of the holiday by wearing green, eating Irish food and/or green foods, imbibing Irish drink and attending parades, which have a particularly long history in the United States and in Canada.