diff --git a/system/I18n/TimeTrait.php b/system/I18n/TimeTrait.php
index d9abb16e29a2..e8c3472d63c0 100644
--- a/system/I18n/TimeTrait.php
+++ b/system/I18n/TimeTrait.php
@@ -1238,19 +1238,11 @@ public function __isset($name): bool
 
     /**
      * This is called when we unserialize the Time object.
+     *
+     * @param array{date: string, timezone: string, timezone_type: int} $data
      */
-    public function __wakeup(): void
+    public function __unserialize(array $data): void
     {
-        /**
-         * Prior to unserialization, this is a string.
-         *
-         * @var string $timezone
-         */
-        $timezone = $this->timezone;
-
-        $this->timezone = new DateTimeZone($timezone);
-
-        // @phpstan-ignore-next-line `$this->date` is a special property for PHP internal use.
-        parent::__construct($this->date, $this->timezone);
+        parent::__construct($data['date'], new DateTimeZone($data['timezone']));
     }
 }
diff --git a/utils/phpstan-baseline/loader.neon b/utils/phpstan-baseline/loader.neon
index 7c302e27351d..7378ca423744 100644
--- a/utils/phpstan-baseline/loader.neon
+++ b/utils/phpstan-baseline/loader.neon
@@ -1,4 +1,4 @@
-# total 2122 errors
+# total 2126 errors
 
 includes:
     - argument.type.neon
diff --git a/utils/phpstan-baseline/method.childParameterType.neon b/utils/phpstan-baseline/method.childParameterType.neon
index d6446dcbb7bd..d5b6014b15a6 100644
--- a/utils/phpstan-baseline/method.childParameterType.neon
+++ b/utils/phpstan-baseline/method.childParameterType.neon
@@ -1,4 +1,4 @@
-# total 8 errors
+# total 12 errors
 
 parameters:
     ignoreErrors:
@@ -41,3 +41,23 @@ parameters:
             message: '#^Parameter \#1 \$value \(int\) of method CodeIgniter\\Entity\\Cast\\IntBoolCast\:\:get\(\) should be contravariant with parameter \$value \(array\|bool\|float\|int\|object\|string\|null\) of method CodeIgniter\\Entity\\Cast\\CastInterface\:\:get\(\)$#'
             count: 1
             path: ../../system/Entity/Cast/IntBoolCast.php
+
+        -
+            message: '#^Parameter \#1 \$data \(array\{date\: string, timezone\: string, timezone_type\: int\}\) of method CodeIgniter\\I18n\\Time\:\:__unserialize\(\) should be contravariant with parameter \$data \(array\) of method DateTimeImmutable\:\:__unserialize\(\)$#'
+            count: 1
+            path: ../../system/I18n/Time.php
+
+        -
+            message: '#^Parameter \#1 \$data \(array\{date\: string, timezone\: string, timezone_type\: int\}\) of method CodeIgniter\\I18n\\Time\:\:__unserialize\(\) should be contravariant with parameter \$data \(array\) of method DateTimeInterface\:\:__unserialize\(\)$#'
+            count: 1
+            path: ../../system/I18n/Time.php
+
+        -
+            message: '#^Parameter \#1 \$data \(array\{date\: string, timezone\: string, timezone_type\: int\}\) of method CodeIgniter\\I18n\\TimeLegacy\:\:__unserialize\(\) should be contravariant with parameter \$data \(array\) of method DateTimeInterface\:\:__unserialize\(\)$#'
+            count: 1
+            path: ../../system/I18n/TimeLegacy.php
+
+        -
+            message: '#^Parameter \#1 \$data \(array\{date\: string, timezone\: string, timezone_type\: int\}\) of method CodeIgniter\\I18n\\TimeLegacy\:\:__unserialize\(\) should be contravariant with parameter \$data \(array\) of method DateTime\:\:__unserialize\(\)$#'
+            count: 1
+            path: ../../system/I18n/TimeLegacy.php