Yeah, in Ireland it was a solemn day of church going and prayer. Americans aren’t really into that kind of holiday though, we like to drink, eat, dress like idiots, and just generally have fun. In the parts of Mexico that actually care about Cinco De Mayo it’s a fun holiday, but it’s very regional. We have a lot of those 1 region holidays here too, mostly revolving around the Revolution, or the Civil War, and some day some beer company will figure out how to hook a marketing campaign on them and they’ll become national.
It is all about marketing something or other.