Where I'm from it's very typical for jobs to offer rotating shifts and advertise them as "day/nights". It depends on the facility as to what "rotating" really means. For some jobs rotating is temporary while you are on orientation and then you will be moved to a permanent position depending on what positions are open. If your position will always be rotating unless otherwise notified, then it most likely means you will be required to work a certain ratio of days to nights. For example, one hospital I worked at required that you scheduled yourself for at least three night shifts a month. Another hospital required that half of my schedule for the month was days and half was nights. Some switch month for month and one month you are days and the next you are nights. I suggest you go into an interview and ask how they're scheduling policy works and go from there. Good luck!