I didn't know what this was...thank you Google. “This was the largest shipment of mayonnaise ever to be sent to Mexico,” according to the internet story. “But the ship ran in to a hurricane and sank, and the cargo was lost forever. The people of Mexico, who were crazy about mayonnaise, were inconsolable over the loss. Their sorrow was so intense, that they declared a National Day of Mourning. It still continues to this day each year on May 5th and is known, of course, as ‘Sinko de Mayo.’ ” Read more: http://atlantic.ctvnews.ca/ctv-news...gend-of-cinco-de-mayo-1.1806517#ixzz30tXi4k9F