St Patrick's Day occurs on March 17 and is day to remember one of Ireland’s patron saints, St Patrick. It largely celebrates Irish-American culture in the United States, and the use of the color green is predominant.
St Patrick is one of Ireland's patron saints and many Americans with Irish ancestry remember him on March 17. Patrick's Day is fixed on March 17, but may occasionally be moved by the authorities of the Catholic Church. This happened in 1940, so that the celebrations would not fall on Palm Sunday, and in 2008 to avoid Holy Monday, the last Monday before Easter Sunday.
Religious symbols include snakes and serpents. Other Irish-related symbols seen on St Patrick’s Day include the harp, which was used in Ireland for centuries, as well as a mythological creature known as the leprechaun and a pot of gold that the leprechaun hides.