Nollaig Shona Dhuit is Merry Christmas in Irish Gaelic, which is still taught in schools in Eire, the Irish Republic. Northern Ireland is part of the United Kingdom. Christmas in Ireland is a traditional holiday in both parts of the island, and very much a family and religious celebration!
Northern Ireland and the Republic of Ireland have different currencies.
In the Republic of Ireland the currency used is the Euro and in Northern Ireland the currency used is the Pound Sterling.
The Republic of Ireland is divided into 30 administrative regions, mostly tied to the 26 constituent counties (county Tipperary is divided in two and county Dublin in four).