Friggatriskaidekaphobia (or paraskevidekatriaphobia) is the name for the fear of Friday the 13th. That’s not to be confused with the fear of the number 13 – which is known as triskaidekaphobia.

Related Fact: The original Friday the 13th film was made for only $550,000 and earned more than $39 Million in the United States alone.

[Source: Psych Central, Merriam-Webster and IMDB. See previous Numbers of the Day here. ]