▶ Why Friday the 13th Is Unlucky
The sixth day of the week and the number 13 both have foreboding reputations said to date from ancient times. It seems their inevitable conjunction from one to three times a year (there will be three such occurrences in 2012, exactly 13 weeks apart) portends more misfortune than some credulous minds can bear. According to some sources it’s the most widespread superstition in the world today. Some people refuse to go to work on Friday the 13th; some won’t eat in restaurants; many wouldn’t think of setting a wedding on the date.
Exactly how old is difficult to say, because determining the origins of superstitions is an inexact science, at best. In fact, it’s mostly guesswork.