As with any month that starts on a Sunday, December has a Friday the 13th, which is today. If you've ever boarded a plane and noticed the 13th row is "missing," you can blame "Triskaidekaphobia" on the phenomenon. (Incidentally, fear of Friday the 13th is called "paraskevidekatriaphobia" - from the Greek word for Friday, "Paraskevi.")
The number 13 gets a bad rap - among them, the Apollo XIII mission. But the number 13 isn't all that bad though.
In Italy, 13 is considered lucky in some contexts. Friday the 13th is considered a "lucky day" at Colgate University. The school was founded by 13 men with $13 and 13 prayers.
Have you ever been to a wedding and heard the pastor say "Love is patient, love is kind. It does not envy, it does not boast, it is not proud?" That verse is in in Paul's 1st letter to the Corinthians - 1 Corinthians 13 to be exact.
Judaism celebrates a young man’s coming of age at a Bar Mitzvah celebration when he turns 13. According to TatooRoadTrip.com, in Punjabi, the word 13 is pronounced "tera," which also means "yours," evoking a devotional pronouncement to God.
Tattoos of the number 13 can represent luck - but also entails misfortune before a greater reward.
(To show I'm not superstitions, I posted this article at 13:13 (1:13 pm MST) on Dec. 13, 2013)