Apparently there is no evidence that Friday 13th is unlucky, at least not until the Victorians added it to their long list of phobias and superstitions. Friday and 13 separately however, have long been associated with bad luck so there's a fair bet that's where it all started.
The fear of Friday 13th is called friggatriskaidekaphobia (or other equally unpronounceable things depending on what source you read). According to research an estimated 17-21 million people suffer from it in the USA. Some people are so paralyzed by fear they won't even get out of bed. And they estimate between $800-$900 million is lost in business on Friday 13th.
Statistically, in certain countries, you are less likely to have an accident on Friday 13th because so many people choose to stay home to avoid accidents. According to UK research it is the opposite which suggests we're far less superstitious than other countries.
|The other 'Friday 13th'. Much scarier|
Personally, despite being a very superstitious child, I think it's a load of rubbish. Nothing bad has ever happened to me on Friday 13th.
I'll let you know at the end of the day if I survived without mishap.