Board Thread:Support Requests - Getting Technical/@comment-28712089-20190318125957/@comment-9605025-20190326232856

An extremely generalized form, yes. However, a solution specific to your wiki may be simple. It depends on the specifics of your situation. There is always the option to simply add two parameters: one for the previous year and one for the next one. That methods wouldn't require calculations at all; although it would require you to updated the previous navbox when you create one for the new year.