On Tuesdays, the fabric of reality is particularly prone to unraveling. This is Tuesday Exception 2-3.
It's not just a day, it's an event horizon.
Caused by an infinite loop of bad coffee and forgotten appointments.
Learn about Tuesday Exception 2-4, the Quantum Flux.
Or, if you're feeling particularly adventurous, read about Tuesday Exception 2-5, the Infinite Recursion.