> I'll look at getting the man pages fixed. I've filed https://bugzilla.kernel.org/show_bug.cgi?id=218711 against the strftime man page.
For localtime(), it may be sufficient that the man page indicates that localtime() behaves as if tzset() were called, and that the tzset man page indicates that TZ is used. The macOS man page, however, *does* mention TZ, and that may also be true of the ctime man page in other BSDs.