What is the meaning of Friday the 13th?

How some people put it superstition or bad luck.it started as a myth that there was a party of 12 gods but one devious god came to the party and there were 13 gods instead of 12 so that killed 1 of the favorites of gods they blamed it on on the unwanted god so from the years then to now people believe 13 is a very unlucky number espacilly if it falls on a Friday but people try to avoid bad luck with good luck and the next Friday the 13th is June 13, 2008 Friday.