Submitted by swalzer on

Do you have triskaidekaphobia* (fear of the number 13)? Ever wonder how Friday the 13th became such an unlucky day?

National Geographic provides a summary of the mythic and religious associations with the number 13.

For a more in-depth look at how this day got a bad reputation and how other superstitions started, check out these books:

The encyclopedia of superstitions
Webster, Richard
398.41 Web

Strange customs, how did they begin? : The origins of the unusual and occult customs, superstitions and traditions
Brasch, R.
133 Bra

A treasury of American superstitions
Lys, Claudia de.
398 DeL

Why people believe weird things : pseudoscience, superstition, and other confusions of our time
Shermer, Michael
133 She

*Triskaidekaphobia translates from Greek as tris (three), kai (and), deka (ten), phobia (fear).