update: added support for date format with many supported

src/Rule.php

@@ -289,15 +289,15 @@ public static function dateEquals(string|DateTimeInterface $date): string
     }
 
     /**
-     * The field under validation must match the given *format*.
+     * The field under validation must match one of the given formats. You should use **either** *date* or *dateFormat*
+     * when validating a field, not both. This validation rule supports all formats supported by PHP's *DateTime* class.
      *
      * @link https://laravel.com/docs/11.x/validation#rule-date-format
      * @link https://www.php.net/manual/en/datetime.format.php
-     * @param string $dateFormat A format supported by the *DateTime* class
      */
-    public static function dateFormat(string $dateFormat): string
+    public static function dateFormat(string ...$dateFormat): string
     {
-        return 'date_format:'.$dateFormat;
+        return 'date_format:'.implode(',', $dateFormat);
     }
 
     /**

src/RuleSet.php

@@ -339,15 +339,15 @@ public function dateEquals(string|DateTimeInterface $date): self
     }
 
     /**
-     * The field under validation must match the given *format*.
+     * The field under validation must match one of the given formats. You should use **either** *date* or *dateFormat*
+     * when validating a field, not both. This validation rule supports all formats supported by PHP's *DateTime* class.
      *
      * @link https://laravel.com/docs/11.x/validation#rule-date-format
      * @link https://www.php.net/manual/en/datetime.format.php
-     * @param string $dateFormat A format supported by the *DateTime* class
      */
-    public function dateFormat(string $dateFormat): self
+    public function dateFormat(string ...$dateFormat): self
     {
-        return $this->rule(Rule::dateFormat($dateFormat));
+        return $this->rule(Rule::dateFormat(...$dateFormat));
     }
 
     /**

tests/Unit/RuleTest.php

@@ -761,6 +761,16 @@ public static function ruleDataProvider(): array
                 'rules' => fn() => RuleSet::create()->dateFormat('d-M-Y'),
                 'fails' => true,
             ],
+            'dateFormat of many valid' => [
+                'data' => '2021-Jan-01',
+                'rules' => fn() => RuleSet::create()->dateFormat('d-M-Y', 'Y-M-d'),
+                'fails' => false,
+            ],
+            'dateFormat of many invalid' => [
+                'data' => '2021-01-01',
+                'rules' => fn() => RuleSet::create()->dateFormat('d-M-Y', 'Y-M-d'),
+                'fails' => true,
+            ],
             'decimal valid' => [
                 'data' => '1.1',
                 'rules' => fn() => RuleSet::create()->decimal(1),