:: paraskavedekatriaphobia

"The fear of Friday the 13th is called paraskavedekatriaphobia. This is a specialized form of triskaidekaphobia, a simple phobia (fear) of the number thirteen, and is also known as friggatriskaidekaphobia. The term triskaidekaphobia was derived in 1911 and first appeared in a mainstream source in 1953." *

será?

* in wikipedia