No, God makes that decision.
No, God decides. But it is St Peter at the gates of Heaven... perhaps you have confused the two.
Nobody. St. Patrick's Day did not begin until years after St. Patrick was already dead. If he celebrated the day, he was already in heaven.
St. Patrick was a bishop in Ireland before he was reborn into Heaven.
He watches over them and decides if they will get into heaven.
Legend says that St. Patrick died on March 17 so that is considered as his feast day - when he entered Heaven.
Patrick is not the one shown with the keys. It is St. Peter, the Apostle. When Our Lord appointed him as leader of His Church He told Peter, "I will give to you the keys of the Kingdom of heaven."
It is not a celebration of his death but a celebration of his rebirth into Heaven.
Roman Catholic AnswerOne of the things that the Church does when it recognizes a saint is to assign a Mass, usually on the anniversary of their death "their birthday into heaven" as it were. St. Patrick's Day is on the 17th of March. As St. Patrick is the patron saint of the Irish, that day is a Holy Day of Obligation in Ireland, people are released from their Lenten fasting, they have a dispensation from Rome if the day falls on a Friday. In Ireland, it is a holy day when everyone goes to Mass.
St. Patrick became a saint by popular acclamation and approval of a local bishop long before the canonization process that requires miracles to prove the person is actually in Heaven was instituted.
St. Patrick's Cathedral
St. Patrick was not married.
St. Patrick was not married.