I love knowledge so any day where I can learn something fundamentally new is a good day for me. By “fundamentally new” I mean something that will either greatly enhance stuff I already knew, or completely reorganize my understanding and interpretation of something new.
During breaks I can get very bored because breaks are generally times when I go several days, weeks even, without learning anything that sparks interest. A week or less of that is tolerable, but when it drags out into a months there are problems. Some people, very foolish people I might add, see education as a linear process that ends once they have the degree needed to get a desired job. Other people, more wise people, know that the more you know the more you are aware of how little you know.
But sometimes the brain needs a break from learning things that are fundamentally new. New information is useless if not properly processed.