When I was a kid, Columbus Day was regarded as a holiday for someone who heroically braved a vast, unknown sea to find a western passage to China and the Orient. Unbeknownst to him and the three ships he was leading ( Nina, Pinta and Santa Maria), when they first sighted land, it was land in a hitherto unknown ( except for its inhabitants and the Icelanders) New World.
Christopher Columbus opened the way to an intercontinental Empire not only for the Kingdom of Spain, but also for Portugal, France, the Netherlands and ( last but far from least) Great Britain. He was known as being a rather brutal dictator who enslaved the indigenous nations he encountered in the Caribbean and he's also known for introducing all manner of New World produce to the Old World.
Today, the gentleman is rather more well known for his negatives than his positives, but I, personally, was raised with the positives. To those who, like me, think of this holiday ( traditionally October 12, but held today, for some reason) as a celebration of discovery rather than homage paid to a madman, I wish a Happy Columbus Day!