Problem in Latest End

Hi,

I have an requirement that I need to show the Final Approval date for the course. This Date is displaying from the configuration which is maintained.

And the same date should display in the Latest END tab in Workitem. But its calculation wrong date.

For Example:

Final Approval Date is : 28.01.2016

Latest End Tab            : 29.01.2016

I don't know how its calculating.