Friday the 13th is considered to be the unluckiest day in the Gregorian Calendar. Many people believe this day must be taken with caution, avoid black cats, ladders and mirrors. Some even believe is a must to carry a good luck charms for protection.
The fear of the number 13 has been given a scientific name: “triskaidekaphobia”; and on analogy to this the fear of Friday the 13th is called paraskevidekatriaphobia, from the Greek words Paraskeví (Παρασκευή, meaning “Friday”), and dekatreís (δεκατρείς, meaning “thirteen”).
This Friday 13th, don’t worry about bad luck, book yourself a massage at Better Body Spa and you will feel like the luckiest person in the world!
https://en.wikipedia.org/wiki/Friday_the_13th
http://www.timeanddate.com/calendar/13-things-friday-13.html