In XamDataChart's Axis has AxisFormatLabelEventHander.

The customer would like to get information that which interval is currently called.

e.g. Let's set Interval value is 6 in CategoryDateTimeAxis class.

and Min and Max range is 24 hours.each 4 hours interval.

The customer can set conditional formatting based on which interval (how many times) is called, he/she can change format (YYYY/MM/DD HH:mm:ss then certain intervals would be MM/DD HH:mm:ss)

Same thing for NumericAxis - can add unit string to the last interval.