Fix the bug on created_at in the customer_entity table on update

.all-contributorsrc

@@ -21,6 +21,15 @@
         "code"
       ]
     },
+    {
+      "login": "sdecalom",
+      "name": "Sebastien DECALOM",
+      "avatar_url": "https://avatars.githubusercontent.com/u/3275377?s=96&v=4",
+      "profile": "https://github.com/sdecalom",
+      "contributions": [
+        "code"
+      ]
+    }
     {
       "login": "LeeSaferite",
       "name": "Lee Saferite",

app/code/core/Mage/Eav/Model/Entity/Attribute/Backend/Time/Created.php

@@ -53,11 +53,23 @@ public function beforeSave($object)
         } else {
             // convert to UTC
             $zendDate = Mage::app()->getLocale()->utcDate(null, $date, true, $this->_getFormat($date));
-            $object->setData($attributeCode, $zendDate->getIso());
+            $date = $this->removeTimezone($zendDate->getIso());
+            $object->setData($attributeCode, $date);
         }
 
         return $this;
     }
+
+    /**
+     * Remove the timezone format
+     *
+     * @param string $date
+     * @return string
+     */
+    public function removeTimezone($date): string
+    {
+        return strtr($date, ["+00:00" => "", "T" => " "]);
+    }
 
     /**
      * Convert create date from UTC to current store time zone