There never were snakes in Ireland. This is pure legend.
No.
he brought Christianity to Ireland
St. Patrick's day was first celebrated in Ireland.
no not even close
St. Patrick was brought to Ireland as a captive sometime between 403AD and 406AD. He stayed for about 6 years before escaping. He returned to Ireland to preach Christianity in 432AD.
The original colour was blue, but they changed it to green because its most related with Ireland
the true meaning to saint patricks day is a day observed by the Irish to commemorate the Patton saint of Ireland.
There are many St. Patrick's Cathedrals. In Ireland there is one in Dublin and two in Armagh. There are also St. Patrick's Cathedrals in other countries.
A very interesting theory, but I doubt very much that there is any connection.
It is Ireland's national holiday. Where there are Irish people or people of Irish descent, St. Patrick's day will be celebrated. St. Patrick is credited with bringing Christianity to Ireland, which is why he is so important to the Irish people.
Someone with a driving license from the Republic of Ireland can drive in Northern Ireland.