I think anything authentically Irish--or even not authentic!--would be packed tomorrow.
What about cooking something at home?
http://allrecipes.com/recipe/slow-cooker-corned-beef-and-cabbage/
I usually just pick up soda bread from a bakery, too.
This for dessert for the kids
http://www.enchantedlearning.com/crafts/stpatrick/rainbowjello/
With whipped cream and gold sprinkles on top (for the gold at the end of the rainbow)