Who's afraid of Friday the 13th?
Browsing the net, I have found the following trivia about this day:
Friday is considered to be unlucky by many Christians. They believe that number 13 brings bad luck because there were 13 people at "The Last Supper" (the last meal Jesus had with his 12 Apostles). Judas, the betrayer, was the 13th to arrive and Jesus was consequently crucified on a Friday.
The superstition surrounding Friday 13 can also be linked to Norse mythology. According to legend, 12 gods were at a banquet at Valhalla when Loke, the demi god of mischief who was not invited, turned up, bringing the total number of guests to 13. He was responsible for the chaos that led to the death of one of the good gods – Balder – so all the gods grieved.
Triskaidekaphobia is the fear of the number 13 while the fear of Friday the 13th is called Paraskevidekatriaphobia.
Many airports skip the 13th gate. Aeroplanes don't have a 13th row.
Many buildings do not have a 13th floor. Numbers on elevators (=lifts) skip from 12 to 14. 90% of US skyscrapers do away with floor number 13, according to reports by the world's largest elevator manufacturers.
In Formula 1 racing, there is no car with the number 13. The number was removed after two drivers were killed in crashes, both driving cars numbered 13.
In Britain, Friday was the conventional day for public hangings. There were 13 steps leading up to the rope and 13 knots in the noose.
There are three Friday the 13ths to look forward to this year and they are 13 weeks apart.