I need to obtain certain data for current week and the same week of the previous year based on the current date.

For example, today is 23/11/2017 - Thursday.
I have the next date range for current week: 20/11/2017 (Monday) - 23/11/2017 (Thursday).

What is the best way to obtain a corresponding weekly date range for the previous year ( 21/11/2016 (Monday) - 24/11/2016 (Thursday) )?