Caturday is the natural conclusion that all cat owners eventually reach: Cats live everyday like it's Saturday. Also a great excuse to share cat stuff online all weekend long.
It makes me so sad that black cats often aren't adopted because they're “difficult to photograph.” Imagine getting an animal for the sole purpose of sharing its image on social media! Of course, that isn't the only reason black cats are neglected. Old-timey superstitions about black cats being “bad luck” don't help the adoption rates go up.