Date Filter - Range AND Relative in same slicer/filter

Here is an example:

Generally a user wants to see analyse Sales data for say last 1 week/month, etc.

But there are certain cases where users would want to see Sales for say 1 week/month before July 4th ... right now the user would have to be given the default filter where start date and end date has to be selected.

But just like the developer can set an anchor date, is it possible to have  adate filter in which the end-user can also select the anchor date or can the anchor date become  a dynamic field (such that it can be derived from another input/calculated field)?