Cinco de Mayo, as it turns out, is is “a holiday that celebrates the date of the Mexican army’s May 5, 1862 victory over France at the Battle of Puebla during the Franco-Mexican War” (from the interwebs). So it really is about more than just tacos.
I hope you had a good day. I hope you had tacos or enchiladas or burritos or some other Mexican-themed food to celebrate the day. I hope you are able to fully appreciate and celebrate the upcoming holiday of — wait for it — Revenge of the Sixth. Another Star Wars holiday.