So, it's Friday the 13th! Spoopy isn't it? Do anything you want really. Tell Friday the 13th stories (real or fake, it's up to you), post related images, talk about your superstitions you have and if you believe in it or not.
Honestly, I don't believe in the concept of "luck" at all, good or bad, and whenever I meet someone who is genuinely scared of Friday the 13th I laugh at them internally.