Update default timezone to Etc/UTC and adjust related configurations

Author: chapterjason

src/EventListener/TimezoneListener.php

@@ -18,7 +18,7 @@ public function __construct(
         private TimezoneManager               $timezoneManager,
         private RequestStack                  $requestStack,
         private ?RequestContextAwareInterface $router = null,
-        private string                        $defaultTimezone = 'UTC',
+        private string                        $defaultTimezone = 'Etc/UTC',
     )
     {
     }
@@ -60,7 +60,7 @@ private function setTimezone(Request $request): void
 
     private function setRouterContext(Request $request): void
     {
-        $this->router?->getContext()->setParameter('_timezone', $request->headers->get('X-Timezone') ?? $this->defaultTimezone);
+        $this->router?->getContext()->setParameter('_timezone', $this->timezoneManager->getTimezone());
     }
 
     public static function getSubscribedEvents(): array

src/Manager/TimezoneManager.php

@@ -20,10 +20,10 @@ public function __construct(
     )
     {
         if (empty($this->enabledTimezoneNames)) {
-            $this->enabledTimezoneNames = ['UTC', ...Timezones::getIds()];
+            $this->enabledTimezoneNames = Timezones::getIds();
         }
 
-        $this->timezone = new DateTimeZone('UTC');
+        $this->timezone = new DateTimeZone('Etc/UTC');
 
         self::setInstance($this);
     }

src/SoureCodeTimezoneBundle.php

@@ -18,14 +18,14 @@ class SoureCodeTimezoneBundle extends AbstractBundle
 
     public function configure(DefinitionConfigurator $definition): void
     {
-        $timezones = ['UTC', ...Timezones::getIds()];
+        $timezones = Timezones::getIds();
 
         // @formatter:off
         $definition->rootNode()
             ->fixXmlConfig('timezone')
             ->children()
                 ->scalarNode('default_timezone')
-                    ->defaultValue('UTC')
+                    ->defaultValue('Etc/UTC')
                     ->info('The default timezone.')
                     ->validate()
                         ->ifTrue(fn ($v) => !in_array($v, $timezones, true))

tests/Manager/TimezoneManagerTest.php

@@ -43,7 +43,7 @@ public function testDefaultTimezoneIsSetOnInitialization(): void
         $timezone = $timezoneManager->getTimezone();
 
         // Assert
-        $this->assertEquals('UTC', $timezone->getName());
+        $this->assertEquals('Etc/UTC', $timezone->getName());
     }
 
     public function testSetValidTimezone(): void

tests/app/config/config.yml

@@ -17,7 +17,7 @@ services:
 
 soure_code_timezone:
     default_timezone: 'Asia/Tokyo'
-    enabled_timezones: ['UTC', 'Europe/Berlin', 'Asia/Tokyo', 'Australia/Sydney']
+    enabled_timezones: ['Etc/UTC', 'Europe/Berlin', 'Asia/Tokyo', 'Australia/Sydney']
 
 framework:
     session: