Slicer: relative date's week format

Hello,

with colleague we stumbled upon an issue. We are to create a report with revenues which to be sent each week to the various managers. Issue is, by default "Last week (calendar)" slicer is some sort of (American?) format which starts from Sunday and ends at Saturday instead of "normal" Monday to Sunday. That only brings confusion and is generally unwanted. We both spent some time looking this up but it seems to be nowhere to be found. The issue seems to be with default slicer itself, not with the dates. Welcome any type of solution, ideally if there is a community slicer adressing this issue.

Thanks, Pavel