Run regression tests with timezone America/Los_Angeles.

Historically we've used timezone "PST8PDT", but the recent release
2024b of tzdb changes the definition of that zone in a way that
breaks many test cases concerned with dates before 1970.  Although
we've not yet adopted 2024b into our own tree, this is already
problematic for people using --with-system-tzdata if their platform
has already adopted 2024b.  To work with both older and newer
versions of tzdb, switch to using "America/Los_Angeles", accepting
the ensuing changes in regression test results.

Back-patch to all supported branches.

Per report and patch from Wolfgang Walther.

Discussion: https://postgr.es/m/0a997455-5aba-4cf2-a354-d26d8bcbfae6@technowledgy.de

Author: tglsfdc

doc/src/sgml/ref/set.sgml

@@ -198,7 +198,7 @@ SELECT setseed(<replaceable>value</replaceable>);
 
        <variablelist>
         <varlistentry>
-         <term><literal>'PST8PDT'</literal></term>
+         <term><literal>'America/Los_Angeles'</literal></term>
          <listitem>
           <para>
            The time zone for Berkeley, California.
@@ -296,7 +296,7 @@ SET datestyle TO postgres, dmy;
   <para>
    Set the time zone for Berkeley, California:
 <screen>
-SET TIME ZONE 'PST8PDT';
+SET TIME ZONE 'America/Los_Angeles';
 </screen>
   </para>
 

doc/src/sgml/regress.sgml

@@ -556,11 +556,11 @@ make check NO_LOCALE=1
     <para>
      Most of the date and time results are dependent on the time zone
      environment.  The reference files are generated for time zone
-     <literal>PST8PDT</literal> (Berkeley, California), and there will be
+     <literal>America/Los_Angeles</literal>, and there will be
      apparent failures if the tests are not run with that time zone setting.
      The regression test driver sets environment variable
-     <envar>PGTZ</envar> to <literal>PST8PDT</literal>, which normally
-     ensures proper results.
+     <envar>PGTZ</envar> to <literal>America/Los_Angeles</literal>,
+     which normally ensures proper results.
     </para>
    </sect2>
 

src/test/regress/expected/date.out

@@ -1264,7 +1264,7 @@ SELECT DATE_TRUNC('MILLENNIUM', TIMESTAMP '1970-03-20 04:30:00.00000'); -- 1001
 SELECT DATE_TRUNC('MILLENNIUM', DATE '1970-03-20'); -- 1001-01-01
           date_trunc          
 ------------------------------
- Thu Jan 01 00:00:00 1001 PST
+ Thu Jan 01 00:00:00 1001 LMT
 (1 row)
 
 SELECT DATE_TRUNC('CENTURY', TIMESTAMP '1970-03-20 04:30:00.00000'); -- 1901
@@ -1288,13 +1288,13 @@ SELECT DATE_TRUNC('CENTURY', DATE '2004-08-10'); -- 2001-01-01
 SELECT DATE_TRUNC('CENTURY', DATE '0002-02-04'); -- 0001-01-01
           date_trunc          
 ------------------------------
- Mon Jan 01 00:00:00 0001 PST
+ Mon Jan 01 00:00:00 0001 LMT
 (1 row)
 
 SELECT DATE_TRUNC('CENTURY', DATE '0055-08-10 BC'); -- 0100-01-01 BC
            date_trunc            
 ---------------------------------
- Tue Jan 01 00:00:00 0100 PST BC
+ Tue Jan 01 00:00:00 0100 LMT BC
 (1 row)
 
 SELECT DATE_TRUNC('DECADE', DATE '1993-12-25'); -- 1990-01-01
@@ -1306,13 +1306,13 @@ SELECT DATE_TRUNC('DECADE', DATE '1993-12-25'); -- 1990-01-01
 SELECT DATE_TRUNC('DECADE', DATE '0004-12-25'); -- 0001-01-01 BC
            date_trunc            
 ---------------------------------
- Sat Jan 01 00:00:00 0001 PST BC
+ Sat Jan 01 00:00:00 0001 LMT BC
 (1 row)
 
 SELECT DATE_TRUNC('DECADE', DATE '0002-12-31 BC'); -- 0011-01-01 BC
            date_trunc            
 ---------------------------------
- Mon Jan 01 00:00:00 0011 PST BC
+ Mon Jan 01 00:00:00 0011 LMT BC
 (1 row)
 
 --

src/test/regress/expected/horology.out

@@ -1,11 +1,16 @@
 --
 -- HOROLOGY
 --
-SET DateStyle = 'Postgres, MDY';
-SHOW TimeZone;  -- Many of these tests depend on the prevailing setting
- TimeZone 
-----------
- PST8PDT
+SHOW TimeZone;  -- Many of these tests depend on the prevailing settings
+      TimeZone       
+---------------------
+ America/Los_Angeles
+(1 row)
+
+SHOW DateStyle;
+   DateStyle   
+---------------
+ Postgres, MDY
 (1 row)
 
 --
@@ -765,12 +770,12 @@ SELECT d1 + interval '1 year' AS one_year FROM TIMESTAMPTZ_TBL;
  Sat Feb 14 17:32:01 1998 PST
  Sun Feb 15 17:32:01 1998 PST
  Mon Feb 16 17:32:01 1998 PST
- Thu Feb 16 17:32:01 0096 PST BC
- Sun Feb 16 17:32:01 0098 PST
- Fri Feb 16 17:32:01 0598 PST
- Wed Feb 16 17:32:01 1098 PST
- Sun Feb 16 17:32:01 1698 PST
- Fri Feb 16 17:32:01 1798 PST
+ Thu Feb 16 17:32:01 0096 LMT BC
+ Sun Feb 16 17:32:01 0098 LMT
+ Fri Feb 16 17:32:01 0598 LMT
+ Wed Feb 16 17:32:01 1098 LMT
+ Sun Feb 16 17:32:01 1698 LMT
+ Fri Feb 16 17:32:01 1798 LMT
  Wed Feb 16 17:32:01 1898 PST
  Mon Feb 16 17:32:01 1998 PST
  Sun Feb 16 17:32:01 2098 PST
@@ -836,12 +841,12 @@ SELECT d1 - interval '1 year' AS one_year FROM TIMESTAMPTZ_TBL;
  Wed Feb 14 17:32:01 1996 PST
  Thu Feb 15 17:32:01 1996 PST
  Fri Feb 16 17:32:01 1996 PST
- Mon Feb 16 17:32:01 0098 PST BC
- Thu Feb 16 17:32:01 0096 PST
- Tue Feb 16 17:32:01 0596 PST
- Sun Feb 16 17:32:01 1096 PST
- Thu Feb 16 17:32:01 1696 PST
- Tue Feb 16 17:32:01 1796 PST
+ Mon Feb 16 17:32:01 0098 LMT BC
+ Thu Feb 16 17:32:01 0096 LMT
+ Tue Feb 16 17:32:01 0596 LMT
+ Sun Feb 16 17:32:01 1096 LMT
+ Thu Feb 16 17:32:01 1696 LMT
+ Tue Feb 16 17:32:01 1796 LMT
  Sun Feb 16 17:32:01 1896 PST
  Fri Feb 16 17:32:01 1996 PST
  Thu Feb 16 17:32:01 2096 PST
@@ -2120,7 +2125,7 @@ SELECT '2020-10-05'::timestamptz > '2202020-10-05'::date as f;
 SELECT '4714-11-24 BC'::date::timestamptz;
            timestamptz           
 ---------------------------------
- Mon Nov 24 00:00:00 4714 PST BC
+ Mon Nov 24 00:00:00 4714 LMT BC
 (1 row)
 
 SET TimeZone = 'UTC-2';
@@ -2627,13 +2632,13 @@ RESET DateStyle;
 SELECT to_timestamp('0097/Feb/16 --> 08:14:30', 'YYYY/Mon/DD --> HH:MI:SS');
          to_timestamp         
 ------------------------------
- Sat Feb 16 08:14:30 0097 PST
+ Sat Feb 16 08:14:30 0097 LMT
 (1 row)
 
 SELECT to_timestamp('97/2/16 8:14:30', 'FMYYYY/FMMM/FMDD FMHH:FMMI:FMSS');
          to_timestamp         
 ------------------------------
- Sat Feb 16 08:14:30 0097 PST
+ Sat Feb 16 08:14:30 0097 LMT
 (1 row)
 
 SELECT to_timestamp('2011$03!18 23_38_15', 'YYYY-MM-DD HH24:MI:SS');
@@ -2670,7 +2675,7 @@ SELECT to_timestamp('My birthday-> Year: 1976, Month: May, Day: 16',
 SELECT to_timestamp('1,582nd VIII 21', 'Y,YYYth FMRM DD');
          to_timestamp         
 ------------------------------
- Sat Aug 21 00:00:00 1582 PST
+ Sat Aug 21 00:00:00 1582 LMT
 (1 row)
 
 SELECT to_timestamp('15 "text between quote marks" 98 54 45',
@@ -2734,7 +2739,7 @@ SELECT to_timestamp('1997 AD 11 16', 'YYYY BC MM DD');
 SELECT to_timestamp('1997 BC 11 16', 'YYYY BC MM DD');
           to_timestamp           
 ---------------------------------
- Tue Nov 16 00:00:00 1997 PST BC
+ Tue Nov 16 00:00:00 1997 LMT BC
 (1 row)
 
 SELECT to_timestamp('1997 A.D. 11 16', 'YYYY B.C. MM DD');
@@ -2746,7 +2751,7 @@ SELECT to_timestamp('1997 A.D. 11 16', 'YYYY B.C. MM DD');
 SELECT to_timestamp('1997 B.C. 11 16', 'YYYY B.C. MM DD');
           to_timestamp           
 ---------------------------------
- Tue Nov 16 00:00:00 1997 PST BC
+ Tue Nov 16 00:00:00 1997 LMT BC
 (1 row)
 
 SELECT to_timestamp('9-1116', 'Y-MMDD');
@@ -3016,19 +3021,19 @@ SELECT to_date('-44-02-01 BC','YYYY-MM-DD BC');
 SELECT to_timestamp('44-02-01 11:12:13 BC','YYYY-MM-DD HH24:MI:SS BC');
           to_timestamp           
 ---------------------------------
- Fri Feb 01 11:12:13 0044 PST BC
+ Fri Feb 01 11:12:13 0044 LMT BC
 (1 row)
 
 SELECT to_timestamp('-44-02-01 11:12:13','YYYY-MM-DD HH24:MI:SS');
           to_timestamp           
 ---------------------------------
- Fri Feb 01 11:12:13 0044 PST BC
+ Fri Feb 01 11:12:13 0044 LMT BC
 (1 row)
 
 SELECT to_timestamp('-44-02-01 11:12:13 BC','YYYY-MM-DD HH24:MI:SS BC');
          to_timestamp         
 ------------------------------
- Mon Feb 01 11:12:13 0044 PST
+ Mon Feb 01 11:12:13 0044 LMT
 (1 row)
 
 --