How to setup a default date in a data slicer?

Hi All,

I am cracking my head to figure out a way to set the default value of a date slicer. The lower boundary should always point to 'today - 5 weeks' and the upper boundary should point to 'today + 5 weeks'. Is there a way to achieve this?

Note: The users want the date slicer with 'between' mode and not 'relative' mode.

Thanks,
SKR
Santhana