CODE EXAMPLE FOR PHP

laravel validation date time format

public function validateDate($attribute, $value)
 {
   if ($value instanceof DateTimeInterface) {
     return true;
   }

   if ((! is_string($value) && ! is_numeric($value)) || strtotime($value) === false) {
     return false;
   }

   $date = date_parse($value);

   return checkdate($date['month'], $date['day'], $date['year']);
 }

############## OR ###################

public function validateDateFormat($attribute, $value, $parameters)
{
  if (! is_string($value) && ! is_numeric($value)) {
    return false;
  }

  $format = $parameters[0];

  $date = DateTime::createFromFormat('!'.$format, $value);

  return $date && $date->format($format) == $value;
}