Cinco de Mayo is the fifth of May, (obviously).  Cinco de Mayo is the celebration of the Battle of Puebla. The holiday commemorates the Mexican Army's 1862 victory over France at the Battle of Puebla during the Franco-Mexican War.  Everyone can celebrate Cinco de Mayo it is a good day in Mexican history.  If people really wanted to yes it could become a national holiday because it was one of the most remembered days in Mexican history.  I don't know who decided no homework day I will be spending it doing homework.