Bizarro Back Issues: Crisis Of The Calendar Man! (1985)
The Batman of the '80s was certainly skewing darker than the previous eras, but that was also a time where all the leftovers from the Silver Age were still more or less directing the story. That's how you get lengthy sagas like Batman having a custody battle over Jason Todd against a straight up vampire, and it's also how you get a story where the Monitor hires Calendar Man to murder Batman.