diff --git a/src/Authentication/Authenticators/AccessTokens.php b/src/Authentication/Authenticators/AccessTokens.php
index 98ce6b0f0..1c6884475 100644
--- a/src/Authentication/Authenticators/AccessTokens.php
+++ b/src/Authentication/Authenticators/AccessTokens.php
@@ -124,7 +124,7 @@ public function check(array $credentials): Result
             ]);
         }
 
-        $token->last_used_at = Time::now()->toDateTimeString();
+        $token->last_used_at = Time::now()->format('Y-m-d H:i:s');
         $identityModel->save($token);
 
         // Ensure the token is set as the current token
diff --git a/src/Authorization/Traits/Authorizable.php b/src/Authorization/Traits/Authorizable.php
index b239a449b..3a1f8fba9 100644
--- a/src/Authorization/Traits/Authorizable.php
+++ b/src/Authorization/Traits/Authorizable.php
@@ -367,7 +367,7 @@ private function saveGroupsOrPermissions(string $type, $model, array $cache): vo
                 $inserts[] = [
                     'user_id'    => $this->id,
                     $type        => $item,
-                    'created_at' => Time::now()->toDateTimeString(),
+                    'created_at' => Time::now()->format('Y-m-d H:i:s'),
                 ];
             }
 
diff --git a/src/Controllers/MagicLinkController.php b/src/Controllers/MagicLinkController.php
index 0dedeee7d..e06f6f44b 100644
--- a/src/Controllers/MagicLinkController.php
+++ b/src/Controllers/MagicLinkController.php
@@ -78,7 +78,7 @@ public function loginAction()
             'user_id' => $user->id,
             'type'    => Session::ID_TYPE_MAGIC_LINK,
             'secret'  => $token,
-            'expires' => Time::now()->addSeconds(setting('Auth.magicLinkLifetime'))->toDateTimeString(),
+            'expires' => Time::now()->addSeconds(setting('Auth.magicLinkLifetime'))->format('Y-m-d H:i:s'),
         ]);
 
         // Send the user an email with the code
diff --git a/src/Models/LoginModel.php b/src/Models/LoginModel.php
index 654f5d428..fbaf8b113 100644
--- a/src/Models/LoginModel.php
+++ b/src/Models/LoginModel.php
@@ -91,7 +91,7 @@ public function fake(Generator &$faker): Login
             'id_type'    => Session::ID_TYPE_EMAIL_PASSWORD,
             'identifier' => $faker->email,
             'user_id'    => null,
-            'date'       => Time::parse('-1 day')->toDateTimeString(),
+            'date'       => Time::parse('-1 day')->format('Y-m-d H:i:s'),
             'success'    => true,
         ]);
     }
diff --git a/src/Models/TokenLoginModel.php b/src/Models/TokenLoginModel.php
index 59f159bcf..fcb8dee25 100644
--- a/src/Models/TokenLoginModel.php
+++ b/src/Models/TokenLoginModel.php
@@ -22,7 +22,7 @@ public function fake(Generator &$faker): Login
             'ip_address' => $faker->ipv4,
             'identifier' => 'token: ' . random_string('crypto', 64),
             'user_id'    => fake(UserModel::class)->id,
-            'date'       => Time::parse('-1 day')->toDateTimeString(),
+            'date'       => Time::parse('-1 day')->format('Y-m-d H:i:s'),
             'success'    => true,
         ]);
     }
diff --git a/tests/Authorization/AuthorizableTest.php b/tests/Authorization/AuthorizableTest.php
index 34ed87a63..4a3ea3daa 100644
--- a/tests/Authorization/AuthorizableTest.php
+++ b/tests/Authorization/AuthorizableTest.php
@@ -6,6 +6,7 @@
 use CodeIgniter\Shield\Authorization\AuthorizationException;
 use CodeIgniter\Shield\Models\UserModel;
 use CodeIgniter\Test\DatabaseTestTrait;
+use Locale;
 use Tests\Support\FakeUser;
 use Tests\Support\TestCase;
 
@@ -295,4 +296,25 @@ public function testCanCascadesToGroupsWithWildcards(): void
 
         $this->assertTrue($this->user->can('admin.access'));
     }
+
+    /**
+     * @see https://github.com/codeigniter4/shield/pull/238
+     */
+    public function testCreatedAtIfDefaultLocaleSetFaWithAddGroup(): void
+    {
+        $currentLocale = Locale::getDefault();
+        Locale::setDefault('fa');
+
+        Time::setTestNow('March 10, 2017', 'America/Chicago');
+
+        $this->user->addGroup('admin');
+
+        $this->seeInDatabase('auth_groups_users', [
+            'user_id'    => $this->user->id,
+            'group'      => 'admin',
+            'created_at' => '2017-03-10 00:00:00',
+        ]);
+
+        Locale::setDefault($currentLocale);
+    }
 }