Useless bit of trivia for a Friday afternoon
Paraskevidekatriaphobia or friggatriskaidekaphobia are the terms given to having a fear of Friday 13th.
Meaning you will probably have spent most of today touching various bits of wood or trying to type with crossed fingers.
Incidentally, hippopotomonstrosesquippedaliophobia is the fear of long words.
Which, when you think about it, is slightly insensitive of the people down the phobia naming department.