In 1912, the home office of Hellman's mayonnaise, at that time still in England, was contacted by the government of Mexico and urgently requested to send a resupply of mayonnaise to that country.
The only ship available which could ensure the timely arrival of this condiment was the RMS Titanic.
The ill-fated ship was, in fact, carrying 20,000 jars of the condiment scheduled for delivery in Vera Cruz, Mexico, which was to be the next port of call for the great ship after New York City.
Apparently at this time, the Mexican people had an inordinate fondness for mayonnaise, and were looking forward to the arrival of the shipment with a fervor bordering upon fanatic.
They were so rabidly fanatic about Hellman's famous product, that when they learned of the sinking of the ship containing their precious cargo, they declared a National Day of Mourning, which many people observe to this very day.
It is known, of course, as the Sinko de Mayo.
Oh, I'm going to hell for that one.