smart filtering in multisource report

I am building a Power BI report from multiple sources, that have diferent intervals of updates. Every update I place a new dump file in Sharepoint so I can compare the data and see old dashboards by filtering the report date.

The data looks like this:

What I want is some sort of smart filter:

select nothing: show maximum date (1-2-21 for risks, 1-1-21 for planning)

select feb-21 from date table: show  1-2-21 for risks, 1-1-21 for planning

select jan-21 from date table: (show 1-1-21 for both risks and planning

Do I need to enter this in every measure, (and if so: how?) Or is there some smart way of using the page-filter function?