Hi Robert,
It is possible to set the DateTimeFormat to X-Axis using the chartControl1.PrimaryXAxis.DateTimeFormat property. Please refer to the same code below.
Sample code:this.chartControl1.PrimaryXAxis.ValueType = ChartValueType.DateTime;
this.chartControl1.PrimaryXAxis.DateTimeFormat = "MMM:yy";
Also I have attached the sample that illustrates the same in this link below.
http://websamples.syncfusion.com/samples/Chart.Windows/F75742/Main.htmKindly let us know if this meets your requirements. Thanks for your patience.
Regards,
Manohari.R