diff --git a/src/backend/utils/adt/jsonpath_exec.c b/src/backend/utils/adt/jsonpath_exec.c
index 41430bab7ed22..2d0599b4aaae3 100644
--- a/src/backend/utils/adt/jsonpath_exec.c
+++ b/src/backend/utils/adt/jsonpath_exec.c
@@ -1840,20 +1840,29 @@ executeDateTimeMethod(JsonPathExecContext *cxt, JsonPathItem *jsp,
 		 * According to SQL/JSON standard enumerate ISO formats for: date,
 		 * timetz, time, timestamptz, timestamp.
 		 *
-		 * We also support ISO 8601 for timestamps, because to_json[b]()
-		 * functions use this format.
+		 * We also support ISO 8601 format (with "T") for timestamps, because
+		 * to_json[b]() functions use this format.
 		 */
 		static const char *fmt_str[] =
 		{
-			"yyyy-mm-dd",
+			"yyyy-mm-dd",		/* date */
+			"HH24:MI:SS.USTZH:TZM", /* timetz */
+			"HH24:MI:SS.USTZH",
 			"HH24:MI:SSTZH:TZM",
 			"HH24:MI:SSTZH",
+			"HH24:MI:SS.US",	/* time without tz */
 			"HH24:MI:SS",
+			"yyyy-mm-dd HH24:MI:SS.USTZH:TZM",	/* timestamptz */
+			"yyyy-mm-dd HH24:MI:SS.USTZH",
 			"yyyy-mm-dd HH24:MI:SSTZH:TZM",
 			"yyyy-mm-dd HH24:MI:SSTZH",
-			"yyyy-mm-dd HH24:MI:SS",
+			"yyyy-mm-dd\"T\"HH24:MI:SS.USTZH:TZM",
+			"yyyy-mm-dd\"T\"HH24:MI:SS.USTZH",
 			"yyyy-mm-dd\"T\"HH24:MI:SSTZH:TZM",
 			"yyyy-mm-dd\"T\"HH24:MI:SSTZH",
+			"yyyy-mm-dd HH24:MI:SS.US", /* timestamp without tz */
+			"yyyy-mm-dd HH24:MI:SS",
+			"yyyy-mm-dd\"T\"HH24:MI:SS.US",
 			"yyyy-mm-dd\"T\"HH24:MI:SS"
 		};
 
diff --git a/src/test/regress/expected/jsonb_jsonpath.out b/src/test/regress/expected/jsonb_jsonpath.out
index 328a6b391990f..6659bc9091ac0 100644
--- a/src/test/regress/expected/jsonb_jsonpath.out
+++ b/src/test/regress/expected/jsonb_jsonpath.out
@@ -1920,6 +1920,21 @@ select jsonb_path_query('"2017-03-10T12:34:56+3:10"', '$.datetime()');
 select jsonb_path_query('"2017-03-10t12:34:56+3:10"', '$.datetime()');
 ERROR:  datetime format is not recognized: "2017-03-10t12:34:56+3:10"
 HINT:  Use a datetime template argument to specify the input data format.
+select jsonb_path_query('"2017-03-10 12:34:56.789+3:10"', '$.datetime()');
+        jsonb_path_query         
+---------------------------------
+ "2017-03-10T12:34:56.789+03:10"
+(1 row)
+
+select jsonb_path_query('"2017-03-10T12:34:56.789+3:10"', '$.datetime()');
+        jsonb_path_query         
+---------------------------------
+ "2017-03-10T12:34:56.789+03:10"
+(1 row)
+
+select jsonb_path_query('"2017-03-10t12:34:56.789+3:10"', '$.datetime()');
+ERROR:  datetime format is not recognized: "2017-03-10t12:34:56.789+3:10"
+HINT:  Use a datetime template argument to specify the input data format.
 select jsonb_path_query('"12:34:56"', '$.datetime().type()');
      jsonb_path_query     
 --------------------------
diff --git a/src/test/regress/sql/jsonb_jsonpath.sql b/src/test/regress/sql/jsonb_jsonpath.sql
index bd025077d520d..e0ce509264a9a 100644
--- a/src/test/regress/sql/jsonb_jsonpath.sql
+++ b/src/test/regress/sql/jsonb_jsonpath.sql
@@ -414,6 +414,9 @@ select jsonb_path_query('"2017-03-10 12:34:56+3:10"', '$.datetime().type()');
 select jsonb_path_query('"2017-03-10 12:34:56+3:10"', '$.datetime()');
 select jsonb_path_query('"2017-03-10T12:34:56+3:10"', '$.datetime()');
 select jsonb_path_query('"2017-03-10t12:34:56+3:10"', '$.datetime()');
+select jsonb_path_query('"2017-03-10 12:34:56.789+3:10"', '$.datetime()');
+select jsonb_path_query('"2017-03-10T12:34:56.789+3:10"', '$.datetime()');
+select jsonb_path_query('"2017-03-10t12:34:56.789+3:10"', '$.datetime()');
 select jsonb_path_query('"12:34:56"', '$.datetime().type()');
 select jsonb_path_query('"12:34:56"', '$.datetime()');
 select jsonb_path_query('"12:34:56+3"', '$.datetime().type()');