They had this, this past year. And it's as mentioned, previously scheduled as early dismissal and I presume they had some of the latitude due to zero snow days. They WERE able to dismiss for the year a few days early.
I'm fine with that. When I was in school, early dismissal meant, end of day classes were cut off - in my kid's classes - they compress them so they get all of their classes, just less time - a third less - which to me is about as good as virtual (meaning, not much).