I'm sure many folks of different backgrounds would conclude i'm superstitious about some things, but i can't imagine that i would ever label myself superstitious. It seems to be a matter of framing one's understanding of the world My frame makes sense: if you don't share my frame, you might look at some of my reasoning and conclude it is based on superstition.

With respect to Friday the 13th, i treat it no differently than any other Friday.