One minor quibble, Charles — Cinco de Mayo isn’t the same thing as Mexican Independence Day. In fact, in Mexico it’s barely celebrated at all:

Cinco de Mayo (Spanish for “fifth of May”) is a holiday held on May 5 that commemorates the Mexican army’s unlikely victory over French forces at the Battle of Puebla on May 5, 1862, under the leadership of General Ignacio Zaragoza Segun. It is celebrated primarily in the state of Puebla and in the United States. While Cinco de Mayo sees limited significance and celebration nationwide in Mexico, the date is observed nationwide in the United States and other locations around the world as a celebration of Mexican heritage and pride. Cinco de Mayo is not Mexico’s Independence Day, the most important national patriotic holiday in Mexico.

en.wikipedia.org

Mexico’s Independence Day is on September 16th.