Revert "Augment dates using display_timezone config"

This reverts commit a133e51.

Author: duncanmcclean

config/system.php

@@ -74,21 +74,6 @@
 
     'date_format' => 'F jS, Y',
 
-    /*
-    |--------------------------------------------------------------------------
-    | Display Timezone
-    |--------------------------------------------------------------------------
-    |
-    | Dates and times are stored in UTC. This setting allows you to determine which
-    | timezone dates and times are displayed in. For a full list of supported timezones,
-    | please see the PHP documentation.
-    |
-    | https://www.php.net/manual/en/timezones.php
-    |
-    */
-
-    'display_timezone' => 'UTC',
-
     /*
     |--------------------------------------------------------------------------
     | Default Character Set

src/Fieldtypes/Date.php

@@ -311,7 +311,7 @@ public function augment($value)
         }
 
         if ($value instanceof Carbon) {
-            return $value->setTimezone(config('statamic.system.display_timezone'));
+            return $value;
         }
 
         if ($this->config('mode') === 'range') {
@@ -321,8 +321,7 @@ public function augment($value)
             ];
         }
 
-        $date = $this->parseSaved($value)
-            ->setTimezone(config('statamic.system.display_timezone'));
+        $date = $this->parseSaved($value);
 
         if (! $this->config('time_enabled')) {
             $date->startOfDay();
@@ -350,7 +349,7 @@ public function toQueryableValue($value)
     private function parseSaved($value)
     {
         try {
-            return Carbon::createFromFormat($this->saveFormat(), $value, 'UTC');
+            return Carbon::createFromFormat($this->saveFormat(), $value);
         } catch (InvalidFormatException|InvalidArgumentException $e) {
             return Carbon::parse($value);
         }

tests/Fieldtypes/DateTest.php

@@ -26,10 +26,8 @@ public function setUp(): void
 
     #[Test]
     #[DataProvider('augmentProvider')]
-    public function it_augments(string $displayTimezone, array $config, string $value, string $expected)
+    public function it_augments($config, $value, $expected)
     {
-        config()->set('statamic.system.display_timezone', $displayTimezone);
-
         $augmented = $this->fieldtype($config)->augment($value);
 
         $this->assertInstanceOf(Carbon::class, $augmented);
@@ -40,52 +38,35 @@ public static function augmentProvider()
     {
         return [
             'date' => [
-                'UTC',
                 [],
                 '2012-01-04',
                 '2012 Jan 04 00:00:00',
             ],
             'date with custom format' => [
-                'UTC',
                 ['format' => 'Y--m--d'],
                 '2012--01--04',
                 '2012 Jan 04 00:00:00',
             ],
-            'date with display timezone' => [
-                'America/New_York',
-                [],
-                '2012-01-04',
-                '2012 Jan 04 00:00:00',
-            ],
 
             // The time and seconds configs are important, otherwise
-            // when parsing dates without times, the time would inherit from "now".
+            // when when parsing dates without times, the time would inherit from "now".
             // We need to rely on the configs to know when or when not to reset the time.
 
             'date with time' => [
-                'UTC',
                 ['time_enabled' => true],
                 '2012-01-04 15:32',
                 '2012 Jan 04 15:32:00',
             ],
             'date with time but seconds disabled' => [
-                'UTC',
                 ['time_enabled' => true],
                 '2012-01-04 15:32:54',
                 '2012 Jan 04 15:32:00',
             ],
             'date with time and seconds' => [
-                'UTC',
                 ['time_enabled' => true, 'time_seconds_enabled' => true],
                 '2012-01-04 15:32:54',
                 '2012 Jan 04 15:32:54',
             ],
-            'date with time and display timezone' => [
-                'America/New_York',
-                ['time_enabled' => true],
-                '2012-01-04 15:32',
-                '2012 Jan 04 10:32:00', // -5 hours
-            ],
         ];
     }
 
@@ -108,21 +89,6 @@ public function it_augments_a_carbon_instance()
         $this->assertSame($instance, $augmented);
     }
 
-    #[Test]
-    public function it_augments_a_carbon_instance_using_display_timezone_config()
-    {
-        // Could happen if you are using the date fieldtype to augment a manually provided value.
-
-        config()->set('statamic.system.display_timezone', 'America/New_York'); // -5 hours
-
-        $instance = new Carbon('2025-01-01 12:00:00');
-        $augmented = $this->fieldtype()->augment($instance);
-
-        $this->assertInstanceOf(Carbon::class, $augmented);
-        $this->assertEquals('America/New_York', $augmented->getTimezone()->getName());
-        $this->assertEquals(7, $instance->hour); // 12pm in UTC is 7am in New York
-    }
-
     #[Test]
     public function it_augments_a_range()
     {