Clap Your Hands...No, That's Peanut Butter
Believe in Unicorns Day is really something you should do more than just this one day.
Unicorns probably existed in some form at one time in history. What happened to them, we'll never know.
You can take believing in unicorns metaphorically and/or philosophically and do it every day.
Lots of people prefer to believe in things that no longer exist. No examples come to mind, but I'm sure there must be people like that and things for them to believe in.
If you know someone like that, please share. No names, please.
If you are someone like that, please share only under a pseudonym. We really don't need to know who you are.
If you believe in things that never existed, just stop it. Get real. Seriously.
If you believe in things that will only exist in the future, let's talk.