Without further ado, the following was found: Issue: timezone → B<timezone>(3) "It seems that timezone uses B<tzfile> internally, but glibc refuses to " "expose it to userspace. This is most likely because the standardised " "functions are more useful and portable, and actually documented by glibc. " "It may only be in glibc just to support the non-glibc-maintained timezone " "data (which is maintained by some other entity)."