The Reds, like most English top-flight sides, will be playing a second game in just over 48 hours when the face Wolves at Anfield.
“It’s absolutely not OK,” Klopp said.
“And we still have it. None of the managers have a problem with matches on Boxing Day, but playing the 26th and 28th is a crime.
“We can say whatever we want and no-one is really interested but every year it is the same for the coaches involved in it.