St. Patrick's day is not a national holiday in the U.S. It is a Catholic feast day. As they say, everyone is Irish on St. Patrick's Day.
saoire / lá saoire
Ireland does not celebrate Thanksgiving at all. It is US and Canadian holiday. Nobody else celebrates it. The Irish living in America, celebrate Thanksgiving the same as everyone else.
robin
The Irish Gaelic language has no letter 'y'.
Easter
Halloween
Ireland is a Christian country, so Christmas is an important holiday for Irish people.
The Irish in Us was created in 1935.
USA
When the holidays come.
Easter Sunday.