I tend to use YYYY.MM.COUNTER these days (at least for projects that have frequent releases). It makes it pretty obvious how fresh or stale an installed version

I tend to use YYYY.MM.COUNTER these days (at least for projects that have frequent releases). It makes it pretty obvious how fresh or stale an installed version is, and I don't have to argue with anybody about what a feature, a bugfix or a backwards incompatible change is.