Vacations ought to be that long that you ran out of things to do. You get bored, so that you start missing the rhythm of the workdays.
I had the loveliest two weeks in Finland. Hunting berries, walking with the dogs, seeing all the people I care for, baking of course.
But getting bored, that would never happen, there is always still something to be done. And yet still, one has to go back to work.