How to extract Week from a Date Formula

Hi everyone,

i have created a a formula "Date" in Bex. the Data look like this:

16.06.2016

17.06.2016

18.06.2016

and now based on this Formula, i want to extract Week and year. some thing looks like this:

WW.YYY

25.2016

26.2016

Can you please help me how to do it?

Thanks