Why is Friday the 13th unlucky? Well, Dan Brown's theory about the Templar Knights all being arrested and murdered on Friday, the 13th way back in 1307 comes to mind.
Then there's Giachino Rossini, composer of 39 operas, who was superstitious about Friday, the 13th. As it turns out, he was right! He ended up dying on a Friday, the 13th.
The Brits have every reason to be fearful of a Friday and a 13 falling on the same day as King Harold II made the decision to go into battle against William the Conqueror on a Friday the 13th, 1066. The good (or not so good) English King Harold ended up dying and losing the battle of Hastings. Worked out well for the French though, so they obviously have a different view on the whole freaky Friday thing.
I reckon its all a matter of culture, perception and projection. For some people it's lucky, for others it's not. The Spanish, for example, reckon the Tuesday/13 combo is an unlucky dish. The Greeks hold that same day as calamitous due to the Fall of Constantinople.
Is there such a thing even? Lucky and unlucky? Amazingly, according to some statistics I was reading, people actually do stay in bed on a Friday, the 13th and call in sick at work.
Hm, maybe I should have done that too, seeing as I got dumped today. My revenge consisted of clicking on the "unfriend" button on Facebook. That's so satisfying. At least it was in the heat of the moment. In hindsight, not so much fun.
Nevertheless, I will meet the next Friday the 13th head on and spit in its face. Or something similar. Whatever. It's just a day like any other, right?