About T-Shirt Design
There is a nice, simple feel to Irish American Flag T-Shirt that keeps the joke from feeling overdone. It fits really well with St. Patrick's Day, but you do not have to be obsessed with that stuff to enjoy the joke.
This would be easy to give as a gift for parties, parades, or any random day when you want to make someone laugh. It has the easy look of a graphic tee that lets the saying do most of the talking.
It has the same easy attitude people usually want from sarcasm shirts without sounding forced. This one is mostly about having a little fun with what you wear, which is kind of the point.