/**
  * Returns the default value for this field, or nullif no default value defined
  *
  * @return mixed The default value for this field, or null if no default value defined
  */
 function getDefaultValue()
 {
     if ($this->getProperty('default_value_type')) {
         $value = $this->formatDate(parent::getDefaultValue());
     } else {
         //Get date of the current day
         $value = $this->formatDate($_SERVER['REQUEST_TIME']);
     }
     return $value;
 }
 private function pushDefaultValueInSubmittedValues(Tracker_FormElement_Field $field, array &$fields_data)
 {
     $fields_data[$field->getId()] = $field->getDefaultValue();
 }