Before the 19th century, though the number 13 was considered unlucky, and Friday was considered unlucky, there was no link between them. The first documented mention of a "Friday the 13th" is generally listed as occurring in the early 1900s.
However, documentation aside, many popular stories exist about the origin of the concept:
*The Last Supper with stories that Judas was the thirteenth guest, and that the Crucifixion of Jesus occurred Friday.
*That the biblical Eve offered the fruit to Adam on a Friday, and that the slaying of Abel happened on a Friday (though the Bible does not identify the days of the week when these events occurred).
*That it started on Friday, October 13, 1307, the date that many Knights Templar were simultaneously arrested in France, by agents of King Philip IV of France.
However, historically, there is no true date that the Friday the 13th superstition can be linked to. Some people are so paralyzed by fear that they are simply unable to get out of bed when Friday the 13th rolls around. The Stress Management Center and Phobia Institute estimates that more than 17 million people are affected by a fear of this day. Despite that, representatives for both Delta and Continental Airlines say that their airlines don't suffer from any noticeable drop in travel on those Fridays.
Warning: A British Medical Journal study has shown that there is a significant increase in traffic related accidents on Friday the 13ths.
Be the exception to the rule...its all about mind over matter and remember, its just another day!