Wrong date values are displayed on X-axis

[pwankhed]

I have created a line graph that shows the JVM's heap memory usage over a period of time, the update frequency is 2 seconds. I have configured the x-axis line chart as below,

xyChart.getStyler().setDatePattern("DD/MMM - HH:mm:ss");

My date datapoints are coming from this object,

nodeRunTime = currMemObj.currNodeRunTime;

and I am adding that to chart as below,

usedHeapSeries = xyChart.addSeries(Ser1_UsedHeap, nodeRunTime, usedHeapMemData);

With this configuration, when I run the chart, I can see a date coming as below:
(note the date is displayed as 34 Feb when the actual date is 3 February. In the console, correct date is printed)

When I checked the actual date that I am passing, I found it is being collected correctly but not being displayed in the proper format. Is this a defect? Am I missing something? Reproducible test case is attached here.

398_code.zip

Thanks!

[timmolter]

dd/MMM - HH:mm:ss
http://www.sdfonlinetester.info/#

[pwankhed]

Thanks @timmolter for your help, that fixes the issue. Not sure how it was working earlier with though DD/MMM