In my book Goodbye, My Love, Jess, the would-be nanny, arrives for her interview with Ben late afternoon on Friday the 13th. Although she scoffs at the notion of being superstitious about the number and the day, she assigns the strange things happening to Friday the 13th.
The fear of Friday the 13th is a widespread phobia, right up there with the superstitions about black cats and walking under a laden and spilling salt. Everyone knows that bad things happen on Friday the 13th and many people avoid the bad luck by staying home on that day, they change appointments, and refrain from certain activities like having a haircut or even changing their bed linens.
There is at least one Friday the 13ht every year, but there can't be more than three - which should be a relief to the phobics. TGIF - thank God it's Friday - normally heralds the beginning of the weekend, so what changes when Friday is also the 13th day of the month? Every month has a thirteenth day. When it fall on a different day of the week, no one pays it any attention. But it isn't very clear why Friday the 13th has such significance, except the link with the fear of the number 13 and the association with historical facts about the day. Here is the link to an article I wrote a while ago. https://maggietideswell.blogspot.co.za/2016/04/the-number-13.html
Some people believe this fear has a biblical link, because Jesus was crucified of Friday the thirteenth and there were 13 people at the table for the Last Supper. In history, the Knights Templar were massacred on Friday, October 13. But nobody really knows where this fear came from, and the media has a great time perpetuating it with movies like the Friday the 13th series.
Here are the links to a couple of wonderful articles about the fear of Friday the 13th: