Improve Date Slicers

I'm strugling to assemble an date slicer that automatically starts always on the last month. Not last date only, but bringing dates related only with the current month. In this way, I don't have to enter in my reports periodically to atualize them between month transitions. If, in some way, we could dinamycally change the value on the slicer, would be good!

I tryed filtering the slicer with filter pannel (doesn't worked), I also tryed to filter the slicer with another slicher and doesn't worked either.

Finnaly, I'm open to discuss the idea more, but I really think will help a lot of users.

Thanks for your attention!