diff --git a/timezone/checktab.awk b/timezone/checktab.awk
index 6a2d19ae00..6d532141e6 100644
--- a/timezone/checktab.awk
+++ b/timezone/checktab.awk
@@ -1,8 +1,8 @@
 # Check tz tables for consistency.
 
-# @(#)checktab.awk	1.6
+# @(#)checktab.awk	1.7
 
-# Contributed by Paul Eggert <eggert@twinsun.com>.
+# Contributed by Paul Eggert.
 
 BEGIN {
 	FS = "\t"
diff --git a/timezone/private.h b/timezone/private.h
index 5de2f7dfe4..9a1ef22abb 100644
--- a/timezone/private.h
+++ b/timezone/private.h
@@ -25,6 +25,8 @@ static char	privatehid[] = "@(#)private.h	7.55";
 #endif /* !defined NOID */
 #endif /* !defined lint */
 
+#define GRANDPARENTED	"Local time zone must be set--see zic manual page"
+
 /*
 ** Defaults for preprocessor symbols.
 ** You can override these in your C compiler options, e.g. `-DHAVE_ADJTIME=0'.
@@ -91,13 +93,13 @@ static char	privatehid[] = "@(#)private.h	7.55";
 #include "time.h"
 #include "stdlib.h"
 
-#if HAVE_GETTEXT - 0
+#if HAVE_GETTEXT
 #include "libintl.h"
-#endif /* HAVE_GETTEXT - 0 */
+#endif /* HAVE_GETTEXT */
 
-#if HAVE_SYS_WAIT_H - 0
+#if HAVE_SYS_WAIT_H
 #include <sys/wait.h>	/* for WIFEXITED and WEXITSTATUS */
-#endif /* HAVE_SYS_WAIT_H - 0 */
+#endif /* HAVE_SYS_WAIT_H */
 
 #ifndef WIFEXITED
 #define WIFEXITED(status)	(((status) & 0xff) == 0)
@@ -106,20 +108,20 @@ static char	privatehid[] = "@(#)private.h	7.55";
 #define WEXITSTATUS(status)	(((status) >> 8) & 0xff)
 #endif /* !defined WEXITSTATUS */
 
-#if HAVE_UNISTD_H - 0
+#if HAVE_UNISTD_H
 #include "unistd.h"	/* for F_OK and R_OK */
-#endif /* HAVE_UNISTD_H - 0 */
+#endif /* HAVE_UNISTD_H */
 
-#if !(HAVE_UNISTD_H - 0)
+#if !HAVE_UNISTD_H
 #ifndef F_OK
 #define F_OK	0
 #endif /* !defined F_OK */
 #ifndef R_OK
 #define R_OK	4
 #endif /* !defined R_OK */
-#endif /* !(HAVE_UNISTD_H - 0) */
+#endif /* !HAVE_UNISTD_H */
 
-/* Unlike <ctype.h>'s isdigit, this also works if c < 0 | c > UCHAR_MAX.  */
+/* Unlike <ctype.h>'s isdigit, this also works if c < 0 | c > UCHAR_MAX. */
 #define is_digit(c) ((unsigned)(c) - '0' <= 9)
 
 /*
@@ -216,7 +218,7 @@ char *	imalloc P((int n));
 void *	irealloc P((void * pointer, int size));
 void	icfree P((char * pointer));
 void	ifree P((char * pointer));
-char *	scheck P((const char *string, const char *format));
+char *	scheck P((const char *string, char *format));
 
 /*
 ** Finally, some convenience items.
@@ -255,7 +257,8 @@ char *	scheck P((const char *string, const char *format));
 ** add one more for a minus sign if the type is signed.
 */
 #define INT_STRLEN_MAXIMUM(type) \
-    ((TYPE_BIT(type) - TYPE_SIGNED(type)) * 302 / 1000 + 1 + TYPE_SIGNED(type))
+	((TYPE_BIT(type) - TYPE_SIGNED(type)) * 302 / 1000 + \
+	1 + TYPE_SIGNED(type))
 #endif /* !defined INT_STRLEN_MAXIMUM */
 
 /*
@@ -289,11 +292,11 @@ char *	scheck P((const char *string, const char *format));
 */
 
 #ifndef _
-#if HAVE_GETTEXT - 0
+#if HAVE_GETTEXT
 #define _(msgid) gettext(msgid)
-#else /* !(HAVE_GETTEXT - 0) */
+#else /* !HAVE_GETTEXT */
 #define _(msgid) msgid
-#endif /* !(HAVE_GETTEXT - 0) */
+#endif /* !HAVE_GETTEXT */
 #endif /* !defined _ */
 
 #ifndef TZ_DOMAIN
diff --git a/timezone/scheck.c b/timezone/scheck.c
index fd115f9c48..2dd9b35285 100644
--- a/timezone/scheck.c
+++ b/timezone/scheck.c
@@ -11,7 +11,7 @@ static char	elsieid[] = "@(#)scheck.c	8.16";
 char *
 scheck(string, format)
 const char * const	string;
-const char * const	format;
+char * const		format;
 {
 	register char *		fbuf;
 	register const char *	fp;
diff --git a/timezone/tzselect.ksh b/timezone/tzselect.ksh
index be589240d1..f6e28bfdab 100644
--- a/timezone/tzselect.ksh
+++ b/timezone/tzselect.ksh
@@ -1,11 +1,11 @@
 #! @KSH@
 
-# '@(#)tzselect.ksh	1.7'
+# '@(#)tzselect.ksh	1.8'
 
 # Ask the user about the time zone, and output the resulting TZ value to stdout.
 # Interact with the user via stderr and stdin.
 
-# Contributed by Paul Eggert <eggert@twinsun.com>.
+# Contributed by Paul Eggert.
 
 # Porting notes:
 #
diff --git a/timezone/zdump.c b/timezone/zdump.c
index 2fcce38c06..78cc28ef65 100644
--- a/timezone/zdump.c
+++ b/timezone/zdump.c
@@ -1,4 +1,4 @@
-static char	elsieid[] = "@(#)zdump.c	7.64";
+static char	elsieid[] = "@(#)zdump.c	7.65";
 
 /*
 ** This code has been made independent of the rest of the time
@@ -144,8 +144,10 @@ static time_t	absolute_min_time;
 static time_t	absolute_max_time;
 static size_t	longest;
 static char *	progname;
+static int	warned;
 
 static char *	abbr P((struct tm * tmp));
+static void	abbrok P((const char * abbr, const char * zone));
 static long	delta P((struct tm * newp, struct tm * oldp));
 static void	dumptime P((const struct tm * tmp));
 static time_t	hunt P((char * name, time_t lot, time_t	hit));
@@ -191,6 +193,44 @@ time_t *	tp;
 }
 #endif /* !defined TYPECHECK */
 
+static void
+abbrok(abbr, zone)
+const char * const	abbr;
+const char * const	zone;
+{
+	register int		i;
+	register const char *	cp;
+	register char *		wp;
+
+	if (warned)
+		return;
+	cp = abbr;
+	wp = NULL;
+	while (isascii(*cp) && isalpha(*cp))
+		++cp;
+	if (cp - abbr == 0)
+		wp = _("lacks alphabetic at start");
+	if (cp - abbr < 3)
+		wp = _("has fewer than 3 alphabetics");
+	if (cp - abbr > 6)
+		wp = _("has more than 6 alphabetics");
+	if (wp == NULL && (*cp == '+' || *cp == '-')) {
+		++cp;
+		if (isascii(*cp) && isdigit(*cp))
+			if (*cp++ == '1' && *cp >= '0' && *cp <= '4')
+				++cp;
+	}
+	if (*cp != '\0')
+		wp = _("differs from POSIX standard");
+	if (wp == NULL)
+		return;
+	(void) fflush(stdout);
+	(void) fprintf(stderr,
+		"%s: warning: zone \"%s\" abbreviation \"%s\" %s\n",
+		progname, zone, abbr, wp);
+	warned = TRUE;
+}
+
 int
 main(argc, argv)
 int	argc;
@@ -216,7 +256,7 @@ char *	argv[];
 	INITIALIZE(cutlotime);
 	INITIALIZE(cuthitime);
 #if HAVE_GETTEXT
-	(void) setlocale(LC_MESSAGES, "");
+	(void) setlocale(LC_ALL, "");
 #ifdef TZ_DOMAINDIR
 	(void) bindtextdomain(TZ_DOMAIN, TZ_DOMAINDIR);
 #endif /* defined TEXTDOMAINDIR */
@@ -297,6 +337,7 @@ _("%s: usage is %s [ --version ] [ -v ] [ -c [loyear,]hiyear ] zonename ...\n"),
 			show(argv[i], now, FALSE);
 			continue;
 		}
+		warned = FALSE;
 		t = absolute_min_time;
 		show(argv[i], t, TRUE);
 		t += SECSPERHOUR * HOURSPERDAY;
@@ -527,6 +568,8 @@ int	v;
 		}
 	}
 	(void) printf("\n");
+	if (tmp != NULL && *abbr(tmp) != '\0')
+		abbrok(abbr(tmp), zone);
 }
 
 static char *
diff --git a/timezone/zic.c b/timezone/zic.c
index fb86fc69d2..57dc5311d5 100644
--- a/timezone/zic.c
+++ b/timezone/zic.c
@@ -1,4 +1,4 @@
-static char	elsieid[] = "@(#)zic.c	7.122";
+static char	elsieid[] = "@(#)zic.c	7.124";
 
 /*
 ** Regardless of the type of time_t, we do our work using this type.
@@ -10,6 +10,10 @@ typedef int	zic_t;
 #include "locale.h"
 #include "tzfile.h"
 
+#ifndef ZIC_MAX_ABBR_LEN_WO_WARN
+#define ZIC_MAX_ABBR_LEN_WO_WARN	6
+#endif /* !defined ZIC_MAX_ABBR_LEN_WO_WARN */
+
 #if HAVE_SYS_STAT_H
 #include "sys/stat.h"
 #endif
@@ -475,8 +479,7 @@ char *	argv[];
 	(void) umask(umask(S_IWGRP | S_IWOTH) | (S_IWGRP | S_IWOTH));
 #endif /* defined unix */
 #if HAVE_GETTEXT
-	(void) setlocale(LC_CTYPE, "");
-	(void) setlocale(LC_MESSAGES, "");
+	(void) setlocale(LC_ALL, "");
 #ifdef TZ_DOMAINDIR
 	(void) bindtextdomain(TZ_DOMAIN, TZ_DOMAINDIR);
 #endif /* defined TEXTDOMAINDIR */
@@ -2197,6 +2200,41 @@ const char * const	string;
 {
 	register int	i;
 
+	if (strcmp(string, GRANDPARENTED) != 0) {
+		register const char *	cp;
+		register char *		wp;
+
+		/*
+		** Want one to ZIC_MAX_ABBR_LEN_WO_WARN alphabetics
+		** optionally followed by a + or - and a number from 1 to 14.
+		*/
+		cp = string;
+		wp = NULL;
+		while (isascii(*cp) && isalpha(*cp))
+			++cp;
+		if (cp - string == 0)
+wp = _("time zone abbreviation lacks alphabetic at start");
+		if (noise && cp - string > 3)
+wp = _("time zone abbreviation has more than 3 alphabetics");
+		if (cp - string > ZIC_MAX_ABBR_LEN_WO_WARN)
+wp = _("time zone abbreviation has too many alphabetics");
+		if (wp == NULL && (*cp == '+' || *cp == '-')) {
+			++cp;
+			if (isascii(*cp) && isdigit(*cp))
+				if (*cp++ == '1' && *cp >= '0' && *cp <= '4')
+					++cp;
+		}
+		if (*cp != '\0')
+wp = _("time zone abbreviation differs from POSIX standard");
+		if (wp != NULL) {
+			wp = ecpyalloc(wp);
+			wp = ecatalloc(wp, " (");
+			wp = ecatalloc(wp, string);
+			wp = ecatalloc(wp, ")");
+			warning(wp);
+			ifree(wp);
+		}
+	}
 	i = strlen(string) + 1;
 	if (charcnt + i > TZ_MAX_CHARS) {
 		error(_("too many, or too long, time zone abbreviations"));