<div id="chart"></div>
<script>
$("#chart").kendoChart({
  categoryAxis: {
    categories: ["Jan", "Feb", "Mar", "Apr"],
    notes: {
      data: [
        { value: "Feb", text: "Important month" }
      ]
    }
  },
  series: [
    { data: [10, 20, 30, 40] }
  ]
});
</script>