html, body, #container {

    width: 100%;

    height: 100%;

    margin: 0;

    padding: 0;

}

anychart.onDocumentReady(function () {

​

    // create data

    var data = [

      {x: "2020-01-12", value: "6"},

      {x: "2020-01-15", value: "2"},

      {x: "2020-01-18", value: "2"},

      {x: "2020-01-19", value: "5"},

      {x: "2020-02-03", value: "1"},

      {x: "2020-02-19", value: "9"},

      {x: "2020-03-19", value: "2"},

      {x: "2020-04-13", value: "3"},

      {x: "2020-04-15", value: "3"},

      {x: "2020-04-20", value: "4"},

      {x: "2020-04-21", value: "1"},

      {x: "2020-05-10", value: "3"},

      {x: "2020-05-11", value: "1"},

      {x: "2020-05-14", value: "1"},

      {x: "2021-01-12", value: "2"}

    ];

​

    // create a chart and set the data

    var chart = anychart.calendar(data);

​

    // configure months

    var months = chart.months();

    months.stroke("#0767b1", 2);

    months.noDataStroke("#dd2c00");

    months.labels().fontColor("#dd2c00");

    months.labels().fontWeight(600);

    months.labels().fontStyle('italic');

    months.underSpace(20);

​

    // configure years

    chart.years().title().fontSize(30);

​

    // set the chart title

    chart.title().useHtml(true);

    chart.title("Calendar Chart: Months<br><br>" +

                "<span style='font-size:12; font-style:italic'>" +

                "GitHub Contributions</span>");

​

    // set the container id

    chart.container("container");

​

    // initiate drawing the chart

    chart.draw();

});