-The system timezone directory used depends on the (g)libc version.
-Libc4 and libc5 use
-.IR /usr/lib/zoneinfo ,
-and, since libc-5.4.6,
-when this doesn't work, will try
-.IR /usr/share/zoneinfo .
-Glibc2 will use the environment variable
-.BR TZDIR ,
-when that exists.
-Its default depends on how it was installed, but normally is
-.IR /usr/share/zoneinfo .
-.LP
-This timezone directory contains the files
-.nf
-localtime local timezone file
-posixrules rules for POSIX-style TZ's
-.fi
-.LP
-Often
-.I /etc/localtime
-is a symlink to the file
-.I localtime
-or to the correct timezone file in the system timezone directory.
-.SH "CONFORMING TO"
+.TP
+.B /etc/localtime
+The system timezone file.
+.TP
+.B /usr/share/zoneinfo/
+The system timezone database directory.
+.TP
+.B /usr/share/zoneinfo/posixrules
+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."
+By default, the zoneinfo Makefile hard links it to the
+.IR America/New_York " tzfile."
+.PP
+Above are the current standard file locations, but they are
+configurable when glibc is compiled.
+.SH CONFORMING TO