public static function monthNames(array $monthKeys = [], array $options = [])
{
if (!$monthKeys) {
$monthKeys = range(1, 12);
}
$res = [];
$abbr = isset($options['abbr']) ? $options['abbr'] : false;
foreach ($monthKeys as $key) {
$res[static::pad($key)] = static::monthName($key, $abbr, $options);
}
return $res;
}