At the Humane Society I worked with, we wouldnt’ adopt black cats on Halloween. You could fill out the paperwork, but not be allowed to bring kitty home until after the holiday is over.
In my experience, people who love black cats don’t just like them, they love them. People come squealing to our adoption tables over black cats, lamenting that they aren’t adopted as often as others. It’s true, and it isn’t. I guess those who adore their darker kitties help make up for that adoption imbalance.
Here is a cool article of someone who photographs black cats to help them get adopted.