...a thing I haven't experienced since 2003. The quarter system gives you a long summer. And we structured our teaching so as to be able to have a quarter off each year. But that quarter always included graduate advising.
So say you had the fall off. You teach a ten week term starting in January. Then you grade a compulsory exam and final papers. This massively eats into your spring holiday. And you also have to prepare two more classes for the spring. This was a common scenario as most people wanted that space in the fall.