The internal medicine rotations really throw off any sense of a routine a family may have.
The interns only get four days off each month, (which comes out to less than one day off each week!), and usually they do not find out what day it will be until up to a day or two beforehand. During their day off, the interns are often trying to catch up on sleep because of the one or two 30-hour shifts they have had during the week, so the day off is usually merely a day to catch up on sleep and prepare for another grueling week.
Each week our family is so excited for my husband to have a day off. We all expect him to be all ours! It is stressful for him, I'm sure, as during these months he truly does need a day of rest and catch-up.
Conversely, when my husband suddenly has a day off, we feel like we need to cancel everything (which is often difficult to do) so that we can spend time with him.
So, the rare days off for my husband come and go. And even if we are able to plan something fun as a family, it still feels like we've been short-changed, and so we immediately start thinking about and planning for what we can do during his next day off, even though we don't know quite when it will be.