diff --git a/src/backend/utils/adt/datetime.c b/src/backend/utils/adt/datetime.c
index 5a1613ef7d0..c9ec9aff19d 100644
--- a/src/backend/utils/adt/datetime.c
+++ b/src/backend/utils/adt/datetime.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/adt/datetime.c,v 1.174.2.1 2007/05/29 04:59:13 neilc Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/adt/datetime.c,v 1.174.2.2 2007/06/12 15:58:39 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -719,11 +719,17 @@ DecodeDateTime(char **field, int *ftype, int nf,
 				}
 				/***
 				 * Already have a date? Then this might be a time zone name
-				 * with embedded punctuation (e.g. "America/New_York") or
-				 * a run-together time with trailing time zone (e.g. hhmmss-zz).
+				 * with embedded punctuation (e.g. "America/New_York") or a
+				 * run-together time with trailing time zone (e.g. hhmmss-zz).
 				 * - thomas 2001-12-25
+				 *
+				 * We consider it a time zone if we already have month & day.
+				 * This is to allow the form "mmm dd hhmmss tz year", which
+				 * we've historically accepted.
 				 ***/
-				else if ((fmask & DTK_DATE_M) == DTK_DATE_M || ptype != 0)
+				else if (ptype != 0 ||
+						 ((fmask & (DTK_M(MONTH) | DTK_M(DAY))) ==
+						  (DTK_M(MONTH) | DTK_M(DAY))))
 				{
 					/* No time zone accepted? Then quit... */
 					if (tzp == NULL)
diff --git a/src/test/regress/expected/timestamptz.out b/src/test/regress/expected/timestamptz.out
index be3d7bed5d1..c2732e310d4 100644
--- a/src/test/regress/expected/timestamptz.out
+++ b/src/test/regress/expected/timestamptz.out
@@ -153,6 +153,38 @@ INSERT INTO TIMESTAMPTZ_TBL VALUES ('Feb 16 17:32:01 -0097');
 ERROR:  time zone displacement out of range: "Feb 16 17:32:01 -0097"
 INSERT INTO TIMESTAMPTZ_TBL VALUES ('Feb 16 17:32:01 5097 BC');
 ERROR:  timestamp out of range: "Feb 16 17:32:01 5097 BC"
+-- Alternate field order that we've historically supported (sort of)
+-- with regular and POSIXy timezone specs
+SELECT 'Wed Jul 11 10:51:14 America/New_York 2001'::timestamptz;
+         timestamptz          
+------------------------------
+ Wed Jul 11 07:51:14 2001 PDT
+(1 row)
+
+SELECT 'Wed Jul 11 10:51:14 GMT-4 2001'::timestamptz;
+         timestamptz          
+------------------------------
+ Tue Jul 10 23:51:14 2001 PDT
+(1 row)
+
+SELECT 'Wed Jul 11 10:51:14 GMT+4 2001'::timestamptz;
+         timestamptz          
+------------------------------
+ Wed Jul 11 07:51:14 2001 PDT
+(1 row)
+
+SELECT 'Wed Jul 11 10:51:14 PST-03:00 2001'::timestamptz;
+         timestamptz          
+------------------------------
+ Wed Jul 11 00:51:14 2001 PDT
+(1 row)
+
+SELECT 'Wed Jul 11 10:51:14 PST+03:00 2001'::timestamptz;
+         timestamptz          
+------------------------------
+ Wed Jul 11 06:51:14 2001 PDT
+(1 row)
+
 SELECT '' AS "64", d1 FROM TIMESTAMPTZ_TBL; 
  64 |               d1                
 ----+---------------------------------
diff --git a/src/test/regress/sql/timestamptz.sql b/src/test/regress/sql/timestamptz.sql
index fc597a6b2cf..af6752addbc 100644
--- a/src/test/regress/sql/timestamptz.sql
+++ b/src/test/regress/sql/timestamptz.sql
@@ -127,6 +127,14 @@ INSERT INTO TIMESTAMPTZ_TBL VALUES ('Jan 01 17:32:01 2001');
 INSERT INTO TIMESTAMPTZ_TBL VALUES ('Feb 16 17:32:01 -0097');
 INSERT INTO TIMESTAMPTZ_TBL VALUES ('Feb 16 17:32:01 5097 BC');
 
+-- Alternate field order that we've historically supported (sort of)
+-- with regular and POSIXy timezone specs
+SELECT 'Wed Jul 11 10:51:14 America/New_York 2001'::timestamptz;
+SELECT 'Wed Jul 11 10:51:14 GMT-4 2001'::timestamptz;
+SELECT 'Wed Jul 11 10:51:14 GMT+4 2001'::timestamptz;
+SELECT 'Wed Jul 11 10:51:14 PST-03:00 2001'::timestamptz;
+SELECT 'Wed Jul 11 10:51:14 PST+03:00 2001'::timestamptz;
+
 SELECT '' AS "64", d1 FROM TIMESTAMPTZ_TBL; 
 
 -- Demonstrate functions and operators