St Patrick's Day is one of those holidays that they could have simply not bothered with. Blasphemy for somebody with an Irish name? Perhaps. Most scholars don't think the guy even existed. It's not a day off of work holiday. Chicago dies its river green for a few hours. It's mainly just an excuse to get drunk. When Bonded Agent came out, I tried to get some home brewer to make some Martian Red Ale. No one would do it.
Mint shakes at some fast food places. And that corned beef and cabbage. They can keep that, thank you.