The Irish. Mostly Catholic
Americans
the us
every age group
Almost everyone
celebrates Saint Patrick (circa AD 385-461), the most commonly recognised of the patron saints of Ireland, and is generally celebrated on 17th of March.
If you are refering to which religious or religously divided population of people celebrate, everyone celebrates, as it is traditionally a day of celebrating patron saint Patrick a revolutionist in Irish history and religion. St Patrick is both respected by all Christian Faiths in Ireland, that being the traditional religious teaching of the native gaelics, Roman Catholic, Catholic and Church of Ireland (Protestant).
On St. Patrick's Day we commemorate the life of St. Patrick, the Apostle of Ireland.
Saint Patrick's Day CelebrationsOur users share with us:Most people in the US with kids and people in Ireland.Everyone in Canada (generally)
Many nationalities and Christians honour St Patrick on 17 March, but the ones who celebrate St Patrick's Day the most are the Irish, since he is the Patron Saint of Ireland.
You have it backwards. Saint Patrick's Day was named after Saint Patrick. March 15 is the Catholic feast day of Saint Patrick.
Saint Patrick was not married.