[Solved]-time scatter plot w/ chart.js-Chart.js

Another solution that worked great for me, was to just use the line type for the chart, configure it for using dates for the x axis, and addtionally disable the lines, so that it just looks like a scatterplot.

new Chart(ctx, {
        type: 'line',
        data: {
            datasets: [{
                x: 2017-07-08T06:15:02-0600,
                y: 23.375
              },{
                x: 2017-07-08T06:20:02-0600,
                y: 23.312
              },{
                x: 2017-07-08T06:25:02-0600,
                y: 23.312
              },{
                x: 2017-07-08T06:30:02-0600,
                y: 23.25
            }]
          },
          options: {
            showLine: false,
            scales: {
              x:{
                type: 'time',
                display: true,
                title: {
                  display: true,
                  text: 'Date'
                },
              },
            }
          }
       }
    );

I see this as a quite elegant solution. The documentation even specifies:

The scatter chart supports all of the same properties as the line chart. By default, the scatter chart will override the showLine property of the line chart to false.

That advice isn't quite right. The javascript moment.js makes it possible to plat scatter data using dates as the x axis value. For some reason the bundled version in Chart.bundle.js wasn't working for me, so I downloaded moment.js directly. I'm using this to setup:

<script src="js/moment.js"></script>
<script src="js/Chart.min.js"></script>

and this for my chart.js data details:

data: [
  {x: moment("2017-07-08T06:15:02-0600"), y: 23.375},
  {x: moment("2017-07-08T06:20:02-0600"),y: 23.312},
  {x: moment("2017-07-08T06:25:02-0600"),y: 23.312},
  {x: moment("2017-07-08T06:30:02-0600"),y: 23.25}
],

It's working great!

According to the documentation of scatter charts:

Unlike the line chart where data can be supplied in two different formats, the scatter chart only accepts data in a point format.

So you can't use values like 2017-07-08T06:15:02-0600. You can convert dates into numbers and use them in your data.

In your case:

data: [{
        x: 1499516102000,
        y: 23.375
    }, {
        x: 1499516402000,
        y: 23.312
    }, {
        x: 1499516702000,
        y: 23.312
    }, {
        x: 1499517002000,
        y: 23.25
    }
]

Now your xAxes will be with numbers, so you can use a callback to modify xAxes labels.