Hi Mike Treat,
There are two approaches to DateTime with RadChart. You may choose to display the "year-month" values along the X axis simply as strings -- in this case you can use the XAxis.DataLabelsColumn --
this approach is shown in this help topic
If you need to plot bars at the exact date you will need to use the OLEAutomation date equivalent -- this is the format supported by RadChart (through DateTime.ToOADate
method). You can find an example here
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