Need custom date between slicer that by default shows a range, but is manually adjustable by user

I have a few reports for sales users that show their customers open orders, sales history. For their Sales hisory report I want the between slicer to always defualt the date range to show the last 12 mo. from today but when they want to input a new range or change it, it renders what they input. For Open orders 6 mo. forward and 1 month back from today, but can input other dates as needed too.

Am I overthinking this, is there an easy way to do this?

Any help on this would be greatly apprechiated!