I was curious about what it all REALLY meant so I did a little research on the net. I visited Wikipedia.org and found a description on it. Here's what the website says about the origins of Friday the 13th:
The origin of the Friday the 13th superstition has been linked to the belief that there were 13 people at The Last Supper of Jesus, who was crucified on Good Friday, but it probably originated in medieval times. It has also been linked to the fact that a lunisolar calendar must have 13 months in some years, while the solar Gregorian calendar and lunar Islamic calendar always have 12 months in a year. Another suggestion is that the belief originated in a Norse myth about twelve gods having a feast in Valhalla. The mischievous Loki gate-crashed the party as an uninvited 13th guest and arranged for Hod, the blind god of darkness, to throw a branch of mistletoe at Balder, the god of joy and gladness. Balder was killed instantly and the Earth was plunged into darkness and mourning as a result.
I guess there are many different interpretations and meanings behind "Friday the 13th". In today's world, I think there still are some hotels or motels that actually close up the 13th floor and prohibit people from staying there. There are even some people in this world who, when visiting hotels, insist on stay on any floor EXCEPT the 13th floor for fear of bad luck or misfortune. LoL Its interesting to see how different people feel towards superstitions and how the react towards it. It is also said that if you are BORN on Friday the 13th then this day, instictively, is your GOOD LUCK day, instead of being a day of misfortune LoL. How cool is that! xD Anyone reading this born on Friday the 13th? =P