I noticed Columbus day on the calendar sometime last week, but I had forgotten all about it until I saw this meme.
I think Columbus day only matters if you get it off, and otherwise nobody pays much attention to it. That being said, it was a big accomplishment for him to discover the New World, even if he never realized it. He thought he had found the East Indies and believed this for the rest of his life. Even after returning to the New World multiple times and spending a lot of time there, he persisted in believing he'd reached East Asia.