OK, some tables ex B25038 have hard-coded field descriptions that change every 2 years. I think the actual column name would stay the same? and it would just be the description would change. Typicially you never have time dimensions like this. It's last 2 years, last 3 years etc. so its good year after year. If you had a report that you relabeled / shortened any names or descriptions, you would have to be careful the following year.
This is something people do have to be aware of that isn't obvious. Keeps everyone on their toes. It also comes up in tables dealing with year home built, among others.