public static function coming_events($from = false)
    {
        $time = ($from ? strtotime($from) : mktime(0, 0, 0, date('m'), date('d'), date('Y')));
        $sql = "(StartDateTime >= '".date('Y-m-d', $time)." 00:00:00')";
        $events = PublicEvent::get()->where($sql);
        return $events;
    }