@den_boey,
In the code snippet shared above, you are using the label to pass date and time values as string. Instead, you can pass the timestamp of the given date to the x-value. To customize the format of the date and time values on the axis you can use valueFormatString as per your requirement. Please take a look at this gallery example for creating a chart with date and time values in ASP.NET MVC.
—
Shashi Ranjan
Team CanvasJS
