Deal correctly with time zones

src/lib/libc/string/strftime.c

@@ -32,7 +32,7 @@
  */
 
 #if defined(LIBC_SCCS) && !defined(lint)
-static char *rcsid = "$OpenBSD: strftime.c,v 1.6 1996/08/19 08:34:18 tholo Exp $";
+static char *rcsid = "$OpenBSD: strftime.c,v 1.7 1996/10/28 16:53:28 tholo Exp $";
 #endif /* LIBC_SCCS and not lint */
 
 #include <sys/localedef.h>
@@ -257,7 +257,8 @@ _fmt(format, t)
 					return(0);
 				continue;
 			case 'Z':
-				if (t->tm_zone && !_add(t->tm_zone))
+				if (tzname[t->tm_isdst ? 1 : 0] &&
+				    !_add(tzname[t->tm_isdst ? 1 : 0]))
 					return(0);
 				continue;
 			case '%':