Scheißtage

Scheißtage: During the "crap days", German workers had to work for free to compensate for the time they have on the toilet the months before.

There are memorial days for pretty much every kind of nonsense – from “International Lost Socks Memorial Day” or “Wiggle Your Toes Day.” However, the “Crap Days” in Germany were a real thing, and pretty severe for the ones they affected.