.B TZ
variable does not appear in the environment, the system timezone is used.
The system timezone is configured by copying, or linking, a file in the
-.BR tzfile "(5) format to"
+.BR tzfile (5)
+format to
.IR /etc/localtime .
A timezone database of these files may be located in the system
timezone directory (see the \fBFILES\fP section below).
When a TZ string includes a dst timezone without anything following it,
then this file is used for the start/end rules.
It is in the
-.BR tzfile "(5) format."
+.BR tzfile (5)
+format.
By default, the zoneinfo Makefile hard links it to the
.IR America/New_York " tzfile."
.PP