-defined as \fBTZDIR\fP in the include file \fItzfile.h\fP. If
-this file fails for any reason, GMT is used.
+defined as \fBTZDIR\fP in the include file \fItzfile.h\fP. If this file
+fails for any reason, the GMT offset as provided by the kernel is
+used, as described above. If this fails for any reason, GMT is used.