Cinco de Mayo is an obscure holiday even in Mexico. Unless you are a French-hating Mexican from the state of Puebla there is no reason to call today a “holiday.”
No Americans celebrate the Battle of Trenton!
You don’t have to use a fake holiday as an excuse to drink a midweek Margarita.
renrutkram 
Well said. It is another contrived reason to just spend money.
Cinco de Mayo is a holiday celebrated originally by Mexicans. It was introduced to America by the Chicanos (Americans with Mexican heritage), who wanted a day to celebrate their Mexican heritage. To the Chicanos, its more of a national family reunion day. Mark is right to an extent, though. To the a lot of Americans, it is an excuse to go out to a mexican resteraunt and have a few margaritas.
At least, that’s what my Spanish teacher tells me.
I’m with you ( except for the margarita thing)! That and Secretary day, boss’ day, and Grandparent’s day.