title: Why error "c.getTimezoneOffset is not a function"?
body: <p>I was try to make simple line graph using Google chart that retrieve data from mysql. My json work but when I try call it in full coding, it say "c.getTimezoneOffset is not a function".</p>
  
  <p>Here my json php</p>
  
  <pre><code>&lt;?php
  include("config.php");
  
  $query = "SELECT * FROM reading";
  $sql = mysqli_query($con, $query);
  
  if (!$sql) {
  die("Error running $sql: " . mysql_error());
  }
  
  $results = array(
  'cols' =&gt; array (
  array('label' =&gt; 'Date', 'type' =&gt; 'datetime'),
  array('label' =&gt; 'API', 'type' =&gt; 'number')
  ),
  'rows' =&gt; array()
  );
  while($row = mysqli_fetch_assoc($sql)) {
  
  $year=date("Y", strtotime($row['time']));
  $month=date("m", strtotime($row['time']));
  $day=date("d", strtotime($row['time']));
  $hour=date("H", strtotime($row['time']));
  $minute=date("i", strtotime($row['time']));
  $second=date("s", strtotime($row['time']));
  
  $results['rows'][] = array('c' =&gt; array(
  array('v' =&gt; "time($year, $month, $day, $hour, $minute, $second)"),
  array('v' =&gt; $row['api'])
  ));
  }
  $json = json_encode($results, JSON_NUMERIC_CHECK);
  echo $json;
  ?&gt;
  </code></pre>
  
  <p>Here my json</p>
  
  <pre><code>{"cols":[{"label":"Date","type":"datetime"},
  "label":"API","type":"number"}],
  "rows":[{"c":[{"v":"time(2016, 05, 22, 12, 24, 26)"},{"v":26}]},
  {"c":[{"v":"time(2016, 05, 22, 12, 24, 41)"},{"v":26}]},
  {"c":[{"v":"time(2016, 05, 22, 12, 24, 56)"},{"v":27}]}]}
  </code></pre>
  
  <p>And here is my html coding</p>
  
  <pre><code>&lt;html&gt;
  &lt;head&gt;
  &lt;!--Load the AJAX API--&gt;
  &lt;script type="text/javascript" src="https://www.google.com/jsapi"&gt;&lt;/script&gt;
  &lt;script type="text/javascript" src="//ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"&gt;&lt;/script&gt;
  &lt;script type="text/javascript"&gt;
  
  // Load the Visualization API and the piechart package.
  google.load('visualization', '1', {'packages':['corechart']});
  
  // Set a callback to run when the Google Visualization API is loaded.
  google.setOnLoadCallback(drawChart);
  
  function drawChart() {
  $.ajax({
  url: 'getData.php',
  dataType: 'json',
  success: function (jsonData) {
  // Create our data table out of JSON data loaded from server.
  var data = new google.visualization.DataTable(jsonData);
  
  // Instantiate and draw our chart, passing in some options.
  var chart = new google.visualization.LineChart(document.getElementById('chart_div'));
  chart.draw(data, {width: 400, height: 240});
  }
  });
  }
  
  &lt;/script&gt;
  &lt;/head&gt;
  
  &lt;body&gt;
  &lt;div id="chart_div"&gt;&lt;/div&gt;
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>