About as valid as the declared “holiday”. Mostly a “Hey! Let’s all get drunk!” sorta occasion.
In 1912, the President of Mexico visited England for a diplomatic meeting...While there, he ate a sandwich with a condiment on it he had never tasted...
He loved it....He loved it so much, he ordered 1000 cases of the condiment to be shipped to his country...he wanted his people to be able to taste it...
On the way over, the ship carrying the condiment, which was mayonnaise, hit an iceberg and sank...It was the Titanic!!!!
The President felt so bad, he declared a holiday....
SINKO DE MAYO.....