try {
                  $db = connectPDO();
                  $result = $db->query("SELECT naziv_plan AS name,
                                        objava_odluke AS start_date,
                                        datum_stupanja_glasnika AS end_date
                                        FROM ispu_plan
                                        WHERE datum_donosenja_plana
                                        BETWEEN '2014-01-01'
                                        AND CURDATE()
                                        ORDER BY datum_donosenja_plana ASC");

                        $rows = array();
                        $table = array();
                             $table['cols'] = array(
                               array('label' => 'Godina', 'type' => 'string'),
                               array('label' => 'Odluka', 'type' => 'number'),
                               array('label' => 'glasnik', 'type' => 'number')
                             );

                  foreach($result as $r) {
                   $temp = array();
                   $temp[] = array('v' => (string) $r['naziv_plan']);
                   $temp[] = array('v' => (int) $r['objava_odluke']);
                   $temp[] = array('v' => (int) $r['datum_stupanja_glasnika']);
                   $rows[] = array('c' => $temp);
                    }
                   $table['rows'] = $rows;
                   $jsonTable = json_encode($table,JSON_NUMERIC_CHECK);
                   } catch(PDOException $e) {
                           echo 'ERROR: ' . $e->getMessage();
                   }

{"cols":[{"label":"Godina","type":"string"},{"label":"Odluka","type":"number"},{"label":"glasnik","type":"number"}],"rows":[{"c":[{"v":"Stambenog susjedstva - Stubiu010dki Trnac - I.ID"},{"v":2014},{"v":2014}]},{"c":[{"v":"Prostorni plan ureu0111enja Grada Krapine - IV. ID"},{"v":2013},{"v":2015}]},{"c":[{"v":"Prostorni plan ureu0111enja Grada Donja Stubica - I ID"},{"v":2014},{"v":2015}]},{"c":[{"v":"Generalni urbanistiu010dki plan Grada Krapine - V.ID"},{"v":2015},{"v":2016}]}]}

google.charts.setOnLoadCallback(drawChart);
    function drawChart() {

        var container = document.getElementById('timeline');
        var chart = new google.visualization.Timeline(container);
        var data = new google.visualization.DataTable(<?php echo $jsonTable;?>);
        chart.draw(data);

+-----------+------------------+-----------------+
| name|     |   start_date     |  end_Date       |
+-----------+------------------+-----------------+
| example_1 | 2014-06-06       | 2014-12-27      |
| example_1 | 2013-12-31       | 2015-06-07      |
| example_1 | 2016-06-06       | 2015-12-31      |
+-----------+------------------+-----------------+