Friday is a full moon.
Friday is also the 13th .
Now, make of it what you will.
There are those who say that the full moon makes no difference in how people behave.
And you might believe that, unless you are a cop, an ambulance driver, a bartender, or work in an emergency room. Then you know that is bullshit.
People get WEIRD in the light of the full moon, at least a subset of them, anyway...A full moon Friday night (or Saturday) makes things fun for the above folks.
Add in a Friday 13th.....
Won't happen again 'til 2049, I am told.