Get End date from relative date filter

Hi,

I want to create a measure where I will filter records based on user selected End date.

(i.e. if user choose last 2 years from relative date filter than @Enddate will be 31/12/2017 and @ startdate will be 1/1/2016)

Then I want to put condition like fact[EndDate]>@enddate in measure.

 How I can get the value of @enddate in a measure.

Thanks,

Anisha