It's because the universe has a bad case of temporal dysentery, that's why.
Apparently, the fabric of space-time has become so tangled that it's now stuck on repeat, reliving the same week over and over. It's like Groundhog Day, but with more coffee.
As a result, every Friday has become indistinguishable from every other Friday. It's like they're all just a bunch of identical, soulless, coffee-fueled drones.
You know, if you really think about it, that's just a pretty bleak outlook.
On the bright side, at least it's always happy hour somewhere... probably.
Read more about the feline perspective on this temporal mess
Tips for dealing with the existential dread of Fridays