diff -U3 /home/jcoleman/Source/postgres/src/test/regress/expected/collate.linux.utf8.out /home/jcoleman/Source/postgres/src/test/regress/results/collate.linux.utf8.out
--- /home/jcoleman/Source/postgres/src/test/regress/expected/collate.linux.utf8.out	2020-03-07 21:08:36.096817992 -0500
+++ /home/jcoleman/Source/postgres/src/test/regress/results/collate.linux.utf8.out	2020-03-07 21:14:54.834103402 -0500
@@ -437,43 +437,38 @@
 
 -- to_char
 SET lc_time TO 'tr_TR';
+ERROR:  invalid value for parameter "lc_time": "tr_TR"
 SELECT to_char(date '2010-02-01', 'DD TMMON YYYY');
    to_char   
 -------------
- 01 ŞUB 2010
+ 01 FEB 2010
 (1 row)
 
 SELECT to_char(date '2010-02-01', 'DD TMMON YYYY' COLLATE "tr_TR");
    to_char   
 -------------
- 01 ŞUB 2010
+ 01 FEB 2010
 (1 row)
 
 SELECT to_char(date '2010-04-01', 'DD TMMON YYYY');
    to_char   
 -------------
- 01 NIS 2010
+ 01 APR 2010
 (1 row)
 
 SELECT to_char(date '2010-04-01', 'DD TMMON YYYY' COLLATE "tr_TR");
    to_char   
 -------------
- 01 NİS 2010
+ 01 APR 2010
 (1 row)
 
 -- to_date
 SELECT to_date('01 ŞUB 2010', 'DD TMMON YYYY');
-  to_date   
-------------
- 02-01-2010
-(1 row)
-
+ERROR:  invalid value "ŞUB" for "MON"
+DETAIL:  The given value did not match any of the allowed values for this field.
 SELECT to_date('01 Şub 2010', 'DD TMMON YYYY');
-  to_date   
-------------
- 02-01-2010
-(1 row)
-
+ERROR:  invalid value "Şub" for "MON"
+DETAIL:  The given value did not match any of the allowed values for this field.
 SELECT to_date('1234567890ab 2010', 'TMMONTH YYYY'); -- fail
 ERROR:  invalid value "1234567890ab" for "MONTH"
 DETAIL:  The given value did not match any of the allowed values for this field.