Some Superstitions.

A ship that sails on Friday will have bad luck.
Never start a trip on Friday or you will meet misfortune.
Never start to make a garment on Friday unless you can finish it the same day.

Fear of Friday the 13th is rooted in ancient, separate bad-luck associations with the number 13 and day Friday. The two unlucky entities combine to make one super unlucky day.




Both Friday and the number 13 were once closely associated with capital punishment. In British tradition, Friday was the conventional day for public hangings, and there were supposedly 13 steps leading up to the noose.
It is traditionally believed that Eve tempted Adam with the apple on a Friday. Tradition also has it that the Flood in the Bible, the confusion at the Tower of Babel, and the death of Jesus Christ all took place on Friday.
Numerologists consider 12 a "complete" number. There are 12 months in a year, 12 signs of the zodiac, 12 gods of Olympus, 12 labors of Hercules, 12 tribes of Israel, and 12 apostles of Jesus. In exceeding 12 by 1, 13's association with bad luck has to do with just being a little beyond completeness.

More than 80 percent of high-rises lack a 13th floor.
Many airports skip the 13th gate.
Airplanes have no 13th aisle.
Hospitals and hotels regularly have no room number 13.
Italians omit the number 13 from their national lottery.
On streets in Florence, Italy, the house between number 12 and 14 is addressed as 12 and a half.
Many cities do not have a 13th Street or a 13th Avenue
In France, socialites known as the quatorziens that is fourteeners once made themselves available as 14th guests to keep a dinner party from an unlucky fate.
Those who fear the unlucky integer are known, point to the ill-fated mission to the moon, Apollo 13.

Cut your hair on Good Friday to prevent headaches in the year to come