Today is Halloween–supposedly the scariest night of the year. Ghouls, goblins, specters, and wisps rise from their graves to haunt the living. Very chilling stuff. Have you ever stepped back and wondered why October 31 is considered the hub of all things scary? Why not August 11th, or September 27th? What is it about October 31st that makes it so special? Well, perhaps that the number 31 backwards is…gasp…13. The number thirteen is widely considered to be a cursed number; it is so feared that there is even a name for the fear of it: Paraskevideka. What about the number 13 is so scary though? Why do some people refuse to get out of bed on Friday the 13th? Is it mere superstition or somehow based in fact? Well, as it turns out—both.
People’s fear of 13 begins with the uncontrollable cosmos. In a solar year there are exactly 12.41 cycles of the moon. That makes for 12 complete, perfect months, with a .41 excess—the hidden 13th month. There are also 13 constellations that cross the ecliptic path; the 13th is Ophiuchus—the serpent holder. I’m confident you don’t need to be told why a superstitious person would fear that. So perhaps the fear of 13 originates in space.








