Did you know that the concept of "Friday the 13th" doesn't exist in Spain? Instead, the unlucky day is Tuesday the 13th (also known as today.) I'm told the Friday-Tuesday switch has to do with Tuesday's association in many languages with Ares/Mars, the god of war (in Spanish, Tuesday is Martes.) Also, the fall of Constantinople happened on a Tuesday, which explains why the Greeks aren't so wild about it, either.
Anyway, despite the anxieties of various Spanish friends, I am happy to report that nothing untoward happened to me today (and it's 11:42 PM, so I'm hoping I can get off scot-free saying that. If no one hears from me in the next 48 hours, send out a search party armed with four leaf clovers and pennies picked up from the sidewalk.)