diff --git a/include/time.h b/include/time.h
--- a/include/time.h
+++ b/include/time.h
@@ -169,7 +169,6 @@
 
 #if __BSD_VISIBLE
 char *timezone(int, int);	/* XXX XSI conflict */
-void tzsetwall(void);
 time_t timelocal(struct tm * const);
 time_t timegm(struct tm * const);
 int timer_oshandle_np(timer_t timerid);
diff --git a/lib/libc/gen/tzset.3 b/lib/libc/gen/tzset.3
--- a/lib/libc/gen/tzset.3
+++ b/lib/libc/gen/tzset.3
@@ -35,8 +35,7 @@
 .Dt TZSET 3
 .Os
 .Sh NAME
-.Nm tzset ,
-.Nm tzsetwall
+.Nm tzset
 .Nd initialize time conversion information
 .Sh LIBRARY
 .Lb libc
@@ -44,8 +43,6 @@
 .In time.h
 .Ft void
 .Fn tzset void
-.Ft void
-.Fn tzsetwall void
 .Sh DESCRIPTION
 The
 .Fn tzset
@@ -99,13 +96,6 @@
 file and cannot be interpreted as a direct specification,
 .Tn UTC
 is used.
-.Pp
-The
-.Fn tzsetwall
-function
-sets things up so that
-.Xr localtime 3
-returns the best available approximation of local wall clock time.
 .Sh SPECIFICATION FORMAT
 When
 .Ev TZ
@@ -336,3 +326,7 @@
 .Fn tzsetwall
 functions first appeared in
 .Bx 4.4 .
+The
+.Fn tzsetwall
+function was removed in
+.Fx 14.0 .
diff --git a/lib/libc/stdtime/Symbol.map b/lib/libc/stdtime/Symbol.map
--- a/lib/libc/stdtime/Symbol.map
+++ b/lib/libc/stdtime/Symbol.map
@@ -14,7 +14,6 @@
 	strptime;
 	strftime;
 	tzname;
-	tzsetwall;
 	tzset;
 	localtime;
 	localtime_r;
diff --git a/lib/libc/stdtime/ctime.3 b/lib/libc/stdtime/ctime.3
--- a/lib/libc/stdtime/ctime.3
+++ b/lib/libc/stdtime/ctime.3
@@ -395,9 +395,7 @@
 structure points to a static array of characters,
 which will also be overwritten by any subsequent calls (as well as by
 subsequent calls to
-.Xr tzset 3
-and
-.Xr tzsetwall 3 ) .
+.Xr tzset 3 .
 .Pp
 Use of the external variable
 .Fa tzname