Today is Friday the 13th, the third and last of three this year.
Of course, most folks know that today is supposed to be unlucky, but why is lost in the mists of time and misfortune.
Still, the superstition persists and is so widespread that experts have come up with two names for the fear of Friday the 13th - friggatriskaidekaphobia and paraskevidekatriaphobia.
Talk about mouthfuls. (The irrational fear of things associated with the number 13 is known as triskaidekaphobia.)