Fuel-calendar is a project mainly written in ..., it's free.
Calendaring package for FuelPHP (nowhere near completion)
If you have feature requests, please add them as issues.
Add calendar
to the packages array in app/config/config.php.
public function action_month($year = null, $month = null)
{
$calendar = Calendar::factory((int) $year, (int) $month)->generate_month();
Calendar::$nav_uri = 'appointments/month';
$this->template->content = $calendar;
}