diff --git a/src/Legacy/Common.php b/src/Legacy/Common.php
index e6706cfe..aaed1271 100644
--- a/src/Legacy/Common.php
+++ b/src/Legacy/Common.php
@@ -106,16 +106,16 @@ protected function ymdTodmy($data = '')
      */
     public function toTimestamp($input)
     {
-//        $regex = '^(2[0-9][0-9][0-9])[-](0?[1-9]'
-//            . '|1[0-2])[-](0?[1-9]'
-//            . '|[12][0-9]'
-//            . '|3[01])T(0[0-9]'
-//            . '|1[0-9]|2[0-3]):[0-5][0-9]:[0-5][0-9]-(01|02|03|04|05):00$';
-//
-//        if (!preg_match("/$regex/", $input)) {
-//            return 0;
-//        }
-//        return \DateTime::createFromFormat("Y-m-d\TH:i:sP", $input)->getTimestamp();
+        $regex = '^(2[0-9][0-9][0-9])[-](0?[1-9]'
+            . '|1[0-2])[-](0?[1-9]'
+            . '|[12][0-9]'
+            . '|3[01])T(0[0-9]'
+            . '|1[0-9]|2[0-3]):[0-5][0-9]:[0-5][0-9]-(01|02|03|04|05):00$';
+
+        if (!preg_match("/$regex/", $input)) {
+            return 0;
+        }
+        return \DateTime::createFromFormat("Y-m-d\TH:i:sP", $input)->getTimestamp();
     }
 
     /**