n time series chart, where time period is 'day', if the min and the max dates in the horizontal axis is not further apart same day is printed (different time). Let me explain, say the min and max dates are 20 Apr 2010 and 21 Apr 2010. So the horizontal axis prints 20 Apr 00:00, 20 Apr 04:00, 20 Apr 08:00, ......, 21 Apr 00:00. I don't want to print 20 Apr twice. Actutally my 'time axis tick label mask' is set to 'dd-MMM-yy'. Hence the horizontal axis has no time info and it looks odd. Please see attachment. How can I make sure the same day is not repeated?