Why is Friday 13th unlucky? Ancient curse and origins and terrifying phobia

For many superstitious people around the world, Friday the 13th is not a date to look forward to in the calendar thanks to its associations with back luck and misfortune – but why is this?For many superstitious people around the world, Friday the 13th is not a date to look forward to in the calendar thanks to its associations with back luck and misfortune – but why is this?