Stop it with all the random 'National Day' hashtags already

I noticed something a bit strange as I was scrolling through my Twitter feed last weekend: I was being bombarded with unicorns.  #BelieveinYOUnicorns was a top trending topic, and, after poking around, I found out I was late to the party to celebrate National Unicorn Day.  SEE ALSO: Retro tech is huge right now because the present is a depressing nightmare I wasn't aware of April 9's sparkly significance — Unicorn Day wasn't marked on Google, or even on my wall calendar. I only found out via...