gistfile1.txt

chart = c3.generate({
    data: {
        x: 'x',
        xFormat: '%Y-%m-%d %H:%M:%S UTC',
        url:'http://localhost:3000/api/v1/usages',
        mimeType: 'json',
        keys: {
            x: 'date',
            value: [ "data1"]
        },

    },
    axis: {
        x: {
            type: "timeseries",
            tick: {
                format: '%H:%M:%S'
            }
        }
    }
});


setTimeout(function () {
    chart.load({
        url: 'http://localhost:3000/api/v1/usages',
        mimeType: 'json',
        axis: {
            x: {
                type: "timeseries",
                tick: {
                    format: '%H:%M:%S'
                }
            }
        }
    });
}, 1000);