Time functions

Hi,
amitchandak , Ahmedx 
I have data in which I have to get the data for the last month and the month before that based on the month and year that I am selecting using slicer. I dont want to use any calendar table here
i.e.., If I am selecting may then I need to get the data for april and march 
not sure how to get this done.

Appreciated your support.

Thanks,